{"title":"Aqua UV Parts \u0026 Accessories","description":"\u003cp\u003eGenuine Aqua Ultraviolet replacement parts and consumables for Classic series UV sterilizers and Ultima II bead filters — lamps, quartz sleeves, transformers, seals, O-rings and gaskets.\u003c\/p\u003e\u003cp\u003eNot sure which part or wattage you need? Send us a photo of your unit's label and we'll confirm before you order.\u003c\/p\u003e","products":[{"product_id":"aqua-uv-replacement-lamp","title":"Aqua UV Classic Replacement UV Lamp - 8W to 57W","description":"\u003cp\u003eGenuine \u003cstrong\u003eAqua Ultraviolet\u003c\/strong\u003e replacement lamps for Classic series pond UV sterilizers, in 8, 15, 25, 40 and 57 watt.\u003c\/p\u003e\n\u003ch3\u003eReplace it at 14 months, not when it dies\u003c\/h3\u003e\n\u003cp\u003eThis is the part people get wrong. Aqua UV rates these lamps for \u003cstrong\u003e14 months of continuous use\u003c\/strong\u003e, and after that \u003cem\u003ethe lamp may still light while producing almost no useful UV-C\u003c\/em\u003e. A glowing lamp tells you nothing.\u003c\/p\u003e\n\u003cp\u003eIt matters more than it sounds: Aqua UV calculates the published flow-rate ratings for their units \u003cstrong\u003eat end-of-lamp-life output\u003c\/strong\u003e. Run past 14 months and your sterilizer is operating below its own spec sheet — which is usually the real answer when someone says their UV \"stopped working\" and the water went green.\u003c\/p\u003e\n\u003ch3\u003eOrder by wattage\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e8 watt\u003c\/strong\u003e — part A20008, 11-1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e15 watt\u003c\/strong\u003e — part A20015, 11-1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25 watt\u003c\/strong\u003e — part A20025, 17-3\/8\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40 watt\u003c\/strong\u003e — part A20040, 33-3\/8\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e57 watt\u003c\/strong\u003e — part A20057, 17-3\/8\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWatch this one:\u003c\/strong\u003e the 25 watt and 57 watt lamps are \u003cem\u003ethe same physical length\u003c\/em\u003e. One will slide happily into the other's unit and it is not the right lamp. Aqua UV's own guidance is blunt about it — lamp length has nothing to do with power output. Order by the wattage marked on your sterilizer, not by measuring the old lamp.\u003c\/p\u003e\n\u003ch3\u003eWhile you have it apart\u003c\/h3\u003e\n\u003cp\u003eWipe the quartz sleeve at the same time. Scale on the sleeve blocks UV-C just as effectively as a dead lamp, and there's no point fitting a fresh lamp inside a fouled sleeve. Clean it with Lime Away or CLR — never anything abrasive, which scratches the quartz. If it won't come clear, fit a \u003ca href=\"\/products\/aqua-uv-quartz-sleeve-w-rubber-seal\"\u003enew quartz sleeve\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhich unit does this fit?\u003c\/h3\u003e\n\u003cp\u003eThese are the lamps for the \u003ca href=\"\/products\/aqua-uv-classic-uv-sterilizer-white\"\u003e\u003cstrong\u003eAqua Ultraviolet Classic UV Sterilizer\u003c\/strong\u003e\u003c\/a\u003e. If you don't have one yet, that's the unit. \u003ca href=\"\/collections\/aqua-uv-parts\"\u003eBrowse all Aqua UV parts →\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eWhy buy from ChampKoi?\u003c\/h3\u003e\n\u003cp\u003eChampKoi has supplied koi keepers from our San Jose, California facility since 1998. Not sure which wattage you're running? Send us a photo of the label on your unit and we'll match it.\u003c\/p\u003e","brand":"Aqua UV","offers":[{"title":"8 Watt UV Lamp","offer_id":45106853609784,"sku":"UVAQR8","price":74.19,"currency_code":"USD","in_stock":true},{"title":"15 Watt UV Lamp","offer_id":48590779744568,"sku":"","price":76.18,"currency_code":"USD","in_stock":true},{"title":"25 Watt UV Lamp","offer_id":48590798487864,"sku":"","price":78.17,"currency_code":"USD","in_stock":true},{"title":"40 Watt UV Lamp","offer_id":48590809497912,"sku":"","price":87.94,"currency_code":"USD","in_stock":true},{"title":"57 Watt UV Lamp","offer_id":48590822375736,"sku":"","price":93.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6132\/2296\/products\/UVAQR8_0.gif?v=1683000553"},{"product_id":"aqua-uv-quartz-sleeve-w-rubber-seal","title":"Aqua UV Classic Quartz Sleeve with Rubber Seal - 8W to 57W","description":"\u003cp\u003eGenuine \u003cstrong\u003eAqua Ultraviolet\u003c\/strong\u003e quartz sleeves, supplied with the rubber seal, for Classic series pond UV sterilizers in 8, 15, 25, 40 and 57 watt.\u003c\/p\u003e\n\u003ch3\u003eWhat the sleeve does\u003c\/h3\u003e\n\u003cp\u003eThe lamp never touches pond water. It sits inside this clear quartz tube, which keeps it dry while letting germicidal UV-C pass straight through. Quartz is used rather than glass precisely because ordinary glass blocks UV-C.\u003c\/p\u003e\n\u003ch3\u003eWhy it needs attention\u003c\/h3\u003e\n\u003cp\u003eMinerals in your water build a film on the outside of the sleeve. Aqua UV's guidance is to \u003cstrong\u003eclean or change the sleeve every few weeks\u003c\/strong\u003e — and that scale is the silent killer of UV performance, because everything looks fine from outside while the lamp shines into a chalky tube.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eClean with \u003cstrong\u003eLime Away, CLR or similar\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNever use anything abrasive.\u003c\/strong\u003e Scratched quartz scatters UV and can't be polished back.\u003c\/li\u003e\n\u003cli\u003eReplace the sleeve when cleaning no longer restores clarity, or if it is chipped or cracked.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTwo things worth knowing before you order\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuartz sleeves carry no warranty from Aqua UV\u003c\/strong\u003e, and any damage caused by a broken sleeve isn't covered either. That's normal for a glass consumable, but worth knowing.\u003c\/li\u003e\n\u003cli\u003eAqua UV advises installing the sterilizer \u003cstrong\u003eafter\u003c\/strong\u003e your filter. Debris arriving at speed is what cracks sleeves.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOrder by wattage\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e8 watt\u003c\/strong\u003e — part A10008, 15\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e15 watt\u003c\/strong\u003e — part A10015, 15\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25 watt\u003c\/strong\u003e — part A10025, 19\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40 watt\u003c\/strong\u003e — part A10040, 36\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e57 watt\u003c\/strong\u003e — part A10057, 19\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOrder by the wattage of your unit, not by measuring — the 25 W and 57 W sleeves are the same length.\u003c\/p\u003e\n\u003ch3\u003eWhich unit does this fit?\u003c\/h3\u003e\n\u003cp\u003eThese are the sleeves for the \u003ca href=\"\/products\/aqua-uv-classic-uv-sterilizer-white\"\u003e\u003cstrong\u003eAqua Ultraviolet Classic UV Sterilizer\u003c\/strong\u003e\u003c\/a\u003e. While you're here, the \u003ca href=\"\/products\/aqua-uv-replacement-lamp\"\u003ereplacement lamp\u003c\/a\u003e is the other 14-month consumable, and the \u003ca href=\"\/products\/aqua-uv-quartz-rubber-seal\"\u003epurple rubber seal\u003c\/a\u003e is available on its own if yours has perished — though a new sleeve ships with one fitted. \u003ca href=\"\/collections\/aqua-uv-parts\"\u003eBrowse all Aqua UV parts →\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eWhy buy from ChampKoi?\u003c\/h3\u003e\n\u003cp\u003eChampKoi has supplied koi keepers from our San Jose, California facility since 1998. Send us a photo of your unit's label if you're not sure what you have.\u003c\/p\u003e","brand":"Aqua UV","offers":[{"title":"8 Watt Unit","offer_id":45106854330680,"sku":"UVAQQ8","price":70.39,"currency_code":"USD","in_stock":true},{"title":"15 Watt Unit","offer_id":45106854363448,"sku":"UVAQQ9","price":70.39,"currency_code":"USD","in_stock":true},{"title":"25 Watt Unit","offer_id":45106854396216,"sku":"UVAQQ10","price":76.18,"currency_code":"USD","in_stock":true},{"title":"40 Watt Unit","offer_id":45106854461752,"sku":"UVAQQ11","price":85.95,"currency_code":"USD","in_stock":true},{"title":"57 Watt Unit","offer_id":45106854428984,"sku":"UVAQQ12","price":76.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6132\/2296\/products\/UVAQQ15_0.jpg?v=1683000555"},{"product_id":"aqua-uv-black-transformer","title":"Aqua UV Classic Replacement Transformer - 8W to 57W","description":"\u003cp\u003eGenuine \u003cstrong\u003eAqua Ultraviolet\u003c\/strong\u003e inline replacement transformers for Classic series pond UV sterilizers. 120V \/ 60 Hz.\u003c\/p\u003e\n\u003cp\u003eThe transformer is the black box on the cord that drives the lamp. When a UV unit goes completely dark with a known-good lamp fitted, this is usually the part that has failed.\u003c\/p\u003e\n\u003ch3\u003eOrder by wattage\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e8 watt\u003c\/strong\u003e — part A30007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e15 watt\u003c\/strong\u003e — part A30014\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25 watt\u003c\/strong\u003e — part A30024\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40 watt\u003c\/strong\u003e — part A30044\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e57 watt\u003c\/strong\u003e — part A30055\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe transformer must match your unit's wattage. There is no universal part.\u003c\/p\u003e\n\u003ch3\u003eA note on black and white\u003c\/h3\u003e\n\u003cp\u003eAqua UV's Classic \u003cem\u003esterilizer bodies\u003c\/em\u003e are sold in both black and white, and that colour choice is what people are usually thinking of. Aqua UV lists \u003cstrong\u003eone transformer per wattage\u003c\/strong\u003e regardless of body colour. If your existing transformer looks different from the one pictured — older units have gone through design revisions — send us a photo of it along with the label on your sterilizer before ordering, and we'll confirm the part with Aqua UV rather than guess.\u003c\/p\u003e\n\u003ch3\u003eWhich unit does this fit?\u003c\/h3\u003e\n\u003cp\u003eThis is the Classic transformer for the \u003ca href=\"\/products\/aqua-uv-classic-uv-sterilizer-white\"\u003e\u003cstrong\u003eAqua Ultraviolet Classic UV Sterilizer\u003c\/strong\u003e\u003c\/a\u003e in 8 to 57 watt. For the larger multi-lamp units, see the \u003ca href=\"\/products\/aqua-uv-nema-transformer\"\u003eNema transformer\u003c\/a\u003e (40 W to 240 W) or the \u003ca href=\"\/products\/aqua-uv-raw-transformer\"\u003eraw transformer\u003c\/a\u003e (40 W, 57 W, 80 W). \u003ca href=\"\/collections\/aqua-uv-parts\"\u003eBrowse all Aqua UV parts →\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eWhy buy from ChampKoi?\u003c\/h3\u003e\n\u003cp\u003eChampKoi has supplied koi keepers from our San Jose, California facility since 1998.\u003c\/p\u003e","brand":"Aqua UV","offers":[{"title":"8 Watt Unit Black Transformer","offer_id":45106854560056,"sku":"UVAQWT8","price":137.43,"currency_code":"USD","in_stock":true},{"title":"15 Watt Unit Black Transformer","offer_id":45106854592824,"sku":"UVAQWT15","price":137.43,"currency_code":"USD","in_stock":true},{"title":"25 Watt Unit White Transformer","offer_id":45106854625592,"sku":"UVAQWT25","price":155.53,"currency_code":"USD","in_stock":true},{"title":"40 Watt Unit Black Transformer","offer_id":45106854658360,"sku":"UVAQWT40","price":204.93,"currency_code":"USD","in_stock":true},{"title":"57 Watt Unit Black Transformer","offer_id":45106854691128,"sku":"UVAQWT57","price":211.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6132\/2296\/products\/UVAQWT8_0.jpg?v=1683000556"},{"product_id":"aqua-uv-4-hole-lamp-end-connector","title":"Aqua UV 4-Hole Lamp End Connector (A40002)","description":"\u003cp\u003eGenuine \u003cstrong\u003eAqua Ultraviolet\u003c\/strong\u003e 4-hole lamp end connector, part \u003cstrong\u003eA40002\u003c\/strong\u003e — also sold as the quartz cap.\u003c\/p\u003e\n\u003cp\u003eThis is the small plug that terminates the lamp's wiring at the end of the quartz sleeve. It's a cheap part that strands an expensive sterilizer: crack or lose one and the unit can't be reassembled.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFits \u003cstrong\u003eClassic, Statuary, Advantage and Skimmer series\u003c\/strong\u003e Aqua UV units.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eDoes not fit Viper or SL units.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eNot wattage-specific — the same part covers 8 W through 57 W Classic.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eApproximately 1\" long × 1\/2\" wide × 5\/8\" high.\u003c\/p\u003e\n\u003ch3\u003eWorth keeping a spare\u003c\/h3\u003e\n\u003cp\u003eIt costs less than a bag of koi food and it's the part you'll discover is broken at the exact moment you have the unit in pieces on the lawn.\u003c\/p\u003e\n\u003ch3\u003eWhy buy from ChampKoi?\u003c\/h3\u003e\n\u003cp\u003eChampKoi has supplied koi keepers from our San Jose, California facility since 1998.\u003c\/p\u003e","brand":"Aqua UV","offers":[{"title":"Default Title","offer_id":45106868617528,"sku":"UV4HOLE_LAMPEND","price":7.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6132\/2296\/products\/UV4HOLE_LAMPEND_0.jpg?v=1683000691"},{"product_id":"aqua-uv-quartz-cap-white","title":"Aqua UV Quartz Cap with Ring – Clear Blue (A40011)","description":"\u003cp\u003eGenuine \u003cstrong\u003eAqua Ultraviolet\u003c\/strong\u003e quartz cap with ring, part \u003cstrong\u003eA40011\u003c\/strong\u003e, in clear blue. Approximately 2-1\/4\" long — 1-3\/4\" diameter at the female-thread end, 1-1\/4\" at the male-thread end.\u003c\/p\u003e\n\u003ch3\u003eFits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eClassic series\u003c\/li\u003e\n\u003cli\u003eStatuary units\u003c\/li\u003e\n\u003cli\u003eAdvantage series\u003c\/li\u003e\n\u003cli\u003eOther standard units\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot for Viper or SL units.\u003c\/strong\u003e Those use A40042 (SL, white), A40139 (2\"\/3\" Viper, white), A40142 (4\"+ Viper, grey) or A40115 (stainless and Viper with wiper). Ask us and we'll order the right one in.\u003c\/p\u003e\n\u003ch3\u003eDon't confuse it with the rubber seal\u003c\/h3\u003e\n\u003cp\u003eIf what you actually need is the small \u003cstrong\u003epurple rubber seal that slips onto the quartz sleeve\u003c\/strong\u003e — roughly 1\" across and 5\/8\" high — that is part A40004, and it's a separate, cheaper item in our store. The two get mixed up constantly.\u003c\/p\u003e\n\u003ch3\u003eWhy buy from ChampKoi?\u003c\/h3\u003e\n\u003cp\u003eChampKoi has kept koi ponds running from our San Jose, California facility since 1998. Send us a photo of your unit's label if you aren't sure what you have.\u003c\/p\u003e","brand":"Aqua UV","offers":[{"title":"Default Title","offer_id":45106868683064,"sku":"UVQUARTZ_CAP","price":13.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6132\/2296\/products\/UVQUARTZ_CAP_0.jpg?v=1683000692"},{"product_id":"aqua-uv-ez-twist-cap-top","title":"Aqua UV EZ-Twist Cap Top","description":"\u003cp\u003eO-Ring included with replacement Aqua UV EZ-Twist Cap Top\u003c\/p\u003e","brand":"Aqua UV","offers":[{"title":"Default Title","offer_id":45106868814136,"sku":"UVEZ_TWIST","price":25.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6132\/2296\/products\/UVEZ_TWIST_0.jpg?v=1683000694"},{"product_id":"aqua-uv-ez-twist-o-ring","title":"Aqua UV EZ-Twist O-Ring","description":"\u003cp\u003eReplacement O-Ring for Aqua UV EZ-Twist Cap\u003c\/p\u003e","brand":"Aqua UV","offers":[{"title":"Default Title","offer_id":45106868846904,"sku":"UVEZ_TWIST_ORING","price":7.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6132\/2296\/products\/UVEZ_TWIST_ORING_0.jpg?v=1683000696"},{"product_id":"aqua-uv-nema-transformer","title":"Aqua UV Nema Transformer","description":"\u003cp\u003eAqua UV Nema transformer replacment unit. \u003c\/p\u003e","brand":"Aqua UV","offers":[{"title":"40 Watt","offer_id":45106870485304,"sku":"UVAQWT40NEMA","price":234.78,"currency_code":"USD","in_stock":true},{"title":"57 Watt","offer_id":45106870518072,"sku":"UVAQWT57NEMA","price":239.76,"currency_code":"USD","in_stock":true},{"title":"80 Watt","offer_id":45106870550840,"sku":"UVAQWT80NEMA","price":234.51,"currency_code":"USD","in_stock":true},{"title":"120 Watt","offer_id":45106870583608,"sku":"UVAQWT120NEMA","price":533.44,"currency_code":"USD","in_stock":true},{"title":"160 Watt","offer_id":45106870616376,"sku":"UVAQWT160NEMA","price":656.31,"currency_code":"USD","in_stock":true},{"title":"200 Watt","offer_id":45106870649144,"sku":"UVAQWT200NEMA","price":943.11,"currency_code":"USD","in_stock":true},{"title":"240 Watt","offer_id":45106870681912,"sku":"UVAQWT240NEMA","price":1023.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6132\/2296\/products\/UVAQWT40NEMA_0.jpg?v=1683000712"},{"product_id":"aqua-uv-raw-transformer","title":"Aqua UV Raw Transformer","description":"\u003cp\u003eAqua UV Raw transformer replacment unit. \u003c\/p\u003e","brand":"Aqua UV","offers":[{"title":"40W","offer_id":51055671574840,"sku":"UVAQWT80RAW-40W","price":119.34,"currency_code":"USD","in_stock":true},{"title":"57W","offer_id":51055671607608,"sku":"UVAQWT80RAW-57W","price":171.54,"currency_code":"USD","in_stock":true},{"title":"80W","offer_id":51055671640376,"sku":"UVAQWT80RAW-80W","price":185.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6132\/2296\/products\/UVAQWT57RAW_0.jpg?v=1683000714"},{"product_id":"honeycomb-filtration-media","title":"Honeycomb Filtration Media","description":"\u003cp\u003eThis light media is ideal for bacterial or mechanical filtration. It’s designed for maximum surface area for biological filtration.\u003c\/p\u003e","brand":"Aqua UV","offers":[{"title":"Default Title","offer_id":45106873794872,"sku":"UMEDIA-1","price":150.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6132\/2296\/products\/UMEDIA_0_5_0.jpg?v=1683000721"},{"product_id":"ultima-ii-key-handle","title":"Aqua UV Ultima II Key Handle Assembly, 1-1\/2\" Valve (A50061)","description":"\u003cp\u003eGenuine \u003cstrong\u003eAqua Ultraviolet\u003c\/strong\u003e key handle assembly for the \u003cstrong\u003eUltima II\u003c\/strong\u003e filter, part \u003cstrong\u003eA50061\u003c\/strong\u003e, for \u003cstrong\u003e1-1\/2\" valves\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThis is the multiport valve handle that directs flow through the filter — the lever you turn to move between filter, backwash and rinse. When the handle goes stiff, leaks past the gasket, or the filter starts bypassing between positions, this assembly is the fix.\u003c\/p\u003e\n\u003ch3\u003eWhat's in the box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBlack key handle assembly\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSpider gasket, already fitted\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eValve cover O-ring\u003c\/li\u003e\n\u003cli\u003eSix screw hole openings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eScrews are not included.\u003c\/strong\u003e Reuse the ones from your existing valve.\u003c\/p\u003e\n\u003ch3\u003eCheck before you order\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003esix-hole pattern\u003c\/strong\u003e is what determines whether this fits your valve — it's the compatibility gate between valve generations. Count the screw holes on your existing valve cover before ordering. This is the 1-1\/2\" version; a separate part covers 2\" valves.\u003c\/p\u003e\n\u003ch3\u003eWhy buy from ChampKoi?\u003c\/h3\u003e\n\u003cp\u003eChampKoi has supplied koi keepers from our San Jose, California facility since 1998. Send us a photo of your valve if you're not certain which version you have — it's a costly part to get wrong.\u003c\/p\u003e","brand":"Aqua UV","offers":[{"title":"1.5 Inch Valve","offer_id":52714821517624,"sku":null,"price":301.63,"currency_code":"USD","in_stock":true},{"title":"2 Inch Valve","offer_id":52714821550392,"sku":null,"price":329.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6132\/2296\/files\/aqua-ultraviolet-ultima-ii-key-handle-assembly-valve-w-spider-gasket-1-5inch-valve-1000.jpg?v=1721329677"},{"product_id":"aqua-uv-quartz-rubber-seal","title":"Aqua UV Rubber Seal for Quartz Sleeve – Purple (A40004)","description":"\u003cp\u003eGenuine \u003cstrong\u003eAqua Ultraviolet\u003c\/strong\u003e purple rubber seal for the quartz sleeve, part \u003cstrong\u003eA40004\u003c\/strong\u003e. Approximately 1\" diameter × 5\/8\" high.\u003c\/p\u003e\n\u003ch3\u003eWhat it does\u003c\/h3\u003e\n\u003cp\u003eThis seal slips onto the end of the quartz sleeve and seals the dry lamp chamber against pond water. It also blocks UV light from escaping the housing. It is small, it is cheap, and it is the part that stands between your transformer end and a wet lamp base.\u003c\/p\u003e\n\u003ch3\u003eFits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eClassic series, black or white, with or without wiper\u003c\/li\u003e\n\u003cli\u003eStatuary units\u003c\/li\u003e\n\u003cli\u003eAdvantage series\u003c\/li\u003e\n\u003cli\u003eTwist series and other standard units\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot for Viper or SL units.\u003c\/strong\u003e Those platforms use different seals — A40006 for SL and the 2\"\/3\" plastic Viper, A40016 for the 4\" and larger plastic Viper, or A40015 where a bushing and O-ring are used instead. Ask us and we'll get the right one.\u003c\/p\u003e\n\u003ch3\u003eDo you actually need one?\u003c\/h3\u003e\n\u003cp\u003eA \u003cstrong\u003enew quartz sleeve ships with this seal already fitted\u003c\/strong\u003e at the correct position, so you only need it as a standalone item — if the old one has perished, torn, gone hard, or gone missing during a service. If you are replacing the sleeve anyway, you don't need to add this.\u003c\/p\u003e\n\u003ch3\u003eDon't confuse it with the quartz cap\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003equartz cap (A40011)\u003c\/strong\u003e is a different, larger part — roughly 2-1\/4\" long, clear blue, threaded at both ends. If you are looking for the cap rather than the seal, that is a separate item in our store.\u003c\/p\u003e\n\u003ch3\u003eWhy buy from ChampKoi?\u003c\/h3\u003e\n\u003cp\u003eChampKoi has kept koi ponds running from our San Jose, California facility since 1998. Send us a photo of your unit's label if you aren't sure what platform you have.\u003c\/p\u003e","brand":"Aqua UV","offers":[{"title":"Default Title","offer_id":52714924835128,"sku":"A40004","price":7.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6132\/2296\/files\/307607568.webp?v=1785359233"},{"product_id":"aqua-ultraviolet-ultima-ii-spider-gasket-2-valve-a50024","title":"Aqua UV Ultima II Spider Gasket – 2\" Valve (A50024)","description":"\u003cp\u003eGenuine \u003cstrong\u003eAqua Ultraviolet\u003c\/strong\u003e spider gasket, part \u003cstrong\u003eA50024\u003c\/strong\u003e, for the \u003cstrong\u003e2\" Ultima II\u003c\/strong\u003e multiport valve. Approximately 6-5\/16\" outside diameter, black.\u003c\/p\u003e\n\u003ch3\u003eWhat it does\u003c\/h3\u003e\n\u003cp\u003eThe Ultima II valve has seven positions — Filter, Backwash, Rinse, Waste, Re-Circulate, Closed and Winter. This star-shaped gasket sits in a groove on the underside of the rotating key and its webs isolate each port from its neighbours. It is the single component that decides whether water goes where the handle says it should.\u003c\/p\u003e\n\u003ch3\u003eSymptoms of a failed spider gasket\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater trickling or running out of the waste line while the valve is in Filter position.\u003c\/strong\u003e This is the classic one.\u003c\/li\u003e\n\u003cli\u003eWeak or ineffective backwash — flow short-circuits between ports instead of reversing through the bead bed.\u003c\/li\u003e\n\u003cli\u003eLeaking between ports, or the filter won't hold pressure.\u003c\/li\u003e\n\u003cli\u003eA handle that has become stiff or hard to turn.\u003c\/li\u003e\n\u003cli\u003eVisible flattening, hardening or cracking, or a gasket that has come unseated or unglued from the key.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTry this first — it may save you the part\u003c\/h3\u003e\n\u003cp\u003eAqua UV's own manual lists \u003cstrong\u003edebris lodged under the spider gasket\u003c\/strong\u003e as the first cause of waste-port leakage, and a gasket that simply \u003cstrong\u003eisn't seated properly in its groove\u003c\/strong\u003e as the second. Before you order, take the valve cover off, rinse the trapped grit out and reseat the gasket. If the leak persists after that, or the rubber has clearly gone hard, it needs replacing.\u003c\/p\u003e\n\u003ch3\u003eOther sizes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1-1\/2\" valve, old style\u003c\/strong\u003e — part A50047.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1-1\/2\" valve, current style\u003c\/strong\u003e — part A50169, which is a gasket \u003cem\u003eassembly\u003c\/em\u003e supplied with shaft seals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3\" side-mount valve\u003c\/strong\u003e — part A50023.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWe can order any of these in. Aqua UV does not always stock the 1-1\/2\" versions, so give us a call rather than guessing.\u003c\/p\u003e\n\u003ch3\u003eOne thing worth knowing\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e2\" key handle assembly (A50062) does not include a spider gasket\u003c\/strong\u003e, whereas the 1-1\/2\" assembly (A50061) does. If you are replacing a 2\" key handle, order this gasket at the same time — otherwise you will have the filter apart twice.\u003c\/p\u003e\n\u003ch3\u003eWhy buy from ChampKoi?\u003c\/h3\u003e\n\u003cp\u003eChampKoi has built and serviced koi ponds from our San Jose, California facility since 1998. We stock Ultima II service parts and we would rather talk you through a five-minute clean than sell you a gasket you don't need.\u003c\/p\u003e","brand":"Aqua UV","offers":[{"title":"Default Title","offer_id":52715039129912,"sku":"A50024","price":70.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6132\/2296\/files\/s-l960_1.webp?v=1785360293"},{"product_id":"ultima-ii-filter-o-ring","title":"Filter Body O-Ring for Aqua UV Ultima II – Aftermarket Replacement","description":"\u003cp\u003eReplacement \u003cstrong\u003efilter body O-ring\u003c\/strong\u003e for the \u003cstrong\u003eAqua Ultraviolet Ultima II\u003c\/strong\u003e bead filter. This is the large O-ring that seals the filter body to the base under the clamp assembly — the one that has to come off any time you open the vessel.\u003c\/p\u003e\n\u003ch3\u003eThis is an aftermarket part, and we would rather say so\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThis is not a genuine Aqua Ultraviolet component and it is not sold as one.\u003c\/strong\u003e It is an unbranded equivalent that does the same job, which is why it costs a fraction of the factory part — Aqua UV's own A50055 lists at $139.90 and typically sells around $98.\u003c\/p\u003e\n\u003cp\u003eIf you would rather have the genuine A50055, we can order it in. Some people want the factory part on a warranty-age filter and that is a perfectly reasonable call. For an out-of-warranty filter that needs a seal before the weekend, this is the sensible option.\u003c\/p\u003e\n\u003ch3\u003eWhen to replace it\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWater weeping or running from the seam between the filter body and the base.\u003c\/li\u003e\n\u003cli\u003eThe O-ring has flattened, hardened, cracked, or taken a permanent set so it no longer springs back.\u003c\/li\u003e\n\u003cli\u003eAs a matter of routine whenever you open the vessel for a media change — you are already there, and reusing a tired body seal is how you end up doing the job twice.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitting notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eClean the groove and both mating faces completely. Grit under an O-ring is the most common cause of a leak on a brand-new seal.\u003c\/li\u003e\n\u003cli\u003eSeat it evenly the whole way round before you bring the clamp up.\u003c\/li\u003e\n\u003cli\u003eTighten the clamp gradually and evenly rather than pulling one side down first.\u003c\/li\u003e\n\u003cli\u003eSilicone lubricant only, if you use anything. Petroleum grease attacks the rubber.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNot sure it is the right seal?\u003c\/h3\u003e\n\u003cp\u003eThe Ultima II uses several different O-rings — body, valve cover, unions and drain cap — and they are easy to mix up. \u003cstrong\u003eSend us a photo of your filter, or the measurement across the old ring, and we will confirm before you order.\u003c\/strong\u003e If what you actually need is the valve cover O-ring, that is a separate item in our store, available for both the 1-1\/2\" and 2\" valves.\u003c\/p\u003e\n\u003ch3\u003eWhy buy from ChampKoi?\u003c\/h3\u003e\n\u003cp\u003eChampKoi has built and serviced koi ponds from our San Jose, California facility since 1998. We stock both genuine and aftermarket service parts, and we will tell you honestly which one your filter warrants.\u003c\/p\u003e","brand":"Champion Nishikigoi","offers":[{"title":"Default Title","offer_id":52715065246008,"sku":null,"price":24.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6132\/2296\/files\/OPHS.jpg?v=1785360945"},{"product_id":"ultima-ii-filter-valve-cover-o-ring","title":"Aqua UV Ultima II Valve Cover O-Ring – 1-1\/2\" \u0026 2\" Valve","description":"\u003cp\u003eGenuine \u003cstrong\u003eAqua Ultraviolet\u003c\/strong\u003e valve cover O-ring for the \u003cstrong\u003eUltima II\u003c\/strong\u003e bead filter. This is the black O-ring that seals the multiport valve cover to the valve body — the one you disturb every time you open the valve to service the spider gasket or clear debris.\u003c\/p\u003e\n\u003ch3\u003eWhich size do I need?\u003c\/h3\u003e\n\u003cp\u003eDon't measure — \u003cstrong\u003ecount the screws in your valve cover\u003c\/strong\u003e. It is the fastest reliable check:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e6 screw openings\u003c\/strong\u003e → 1-1\/2\" valve → part \u003cstrong\u003eA50063\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10 screw openings\u003c\/strong\u003e → 2\" valve → part \u003cstrong\u003eA50068\u003c\/strong\u003e (approx. 6-1\/2\" diameter)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf your Ultima II uses a \u003cem\u003eside-mount\u003c\/em\u003e valve rather than a top-mount — that's the 30,000 and 60,000 models — you need A50041 instead, which is a different part. Ask us and we'll get it for you.\u003c\/p\u003e\n\u003ch3\u003eWhen to replace it\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAny weeping or drip from the seam between the valve cover and the valve body.\u003c\/li\u003e\n\u003cli\u003eThe O-ring has gone flat, hard, shiny or cracked, or has taken a permanent set in the groove.\u003c\/li\u003e\n\u003cli\u003eAs a matter of course whenever you replace the spider gasket — you have the cover off anyway, and a tired cover O-ring will undo the work.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitting notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eClean the groove out completely before seating the new O-ring. Grit under an O-ring is the most common cause of a leak on a fresh part.\u003c\/li\u003e\n\u003cli\u003eSeat it evenly all the way round, then tighten the cover screws gradually in a cross pattern rather than one at a time.\u003c\/li\u003e\n\u003cli\u003eUse a silicone-based lubricant if you use anything at all. Petroleum grease degrades the rubber.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy buy from ChampKoi?\u003c\/h3\u003e\n\u003cp\u003eChampKoi has built and serviced koi ponds from our San Jose, California facility since 1998. We keep Ultima II service parts on the shelf because a filter down in August is not a mail-order problem. Send us a photo of your valve if you aren't sure which you have.\u003c\/p\u003e","brand":"Aqua UV","offers":[{"title":"1-1\/2\" Valve","offer_id":52715470913848,"sku":"A50063","price":27.95,"currency_code":"USD","in_stock":true},{"title":"2\" Valve","offer_id":52715092902200,"sku":"A50068","price":29.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6132\/2296\/files\/OPHS_1.jpg?v=1785362356"}],"url":"https:\/\/www.champkoi.com\/collections\/aqua-uv-parts.oembed","provider":"Champion Nishikigoi","version":"1.0","type":"link"}