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Polypropylene Bulkhead Fitting - 1 1/2", 2", 3" and 4"
Polypropylene Bulkhead Fitting - 1 1/2", 2", 3" and 4"
Learn more
- Koi Pond Pump and Aeration Buyer's Guide: Sizing, Head and Running Cost Turnover rate, head pressure and what it costs to run per month.
- Koi Pond Filter and Filtration Buyer's Guide: Staging, Sizing and What to Buy Why you halve the gallon rating, and how to tell yours is falling behind.
- Koi Pond Supplies: What You Actually Need for a Backyard Koi Pond The full build, in the order you buy it, with real costs.
Ordering Information
Ordering Information
At Champion Nishikigoi, we’ve streamlined the order process for a smooth experience with koi fish, food, and pond equipment.
Koi Fish Orders:
After placing a koi fish order, we confirm availability and health, reserve your koi, and prepare it for pickup or shipping. If issues arise, we’ll reach out to discuss options.
Product Orders (Food & Equipment):
For supplies, we gather your items and notify you for pickup. If anything is out of stock, we’ll discuss alternatives.
Pickup & Shipping:
• Local Pickup: Available Tuesday to Sunday, 10 am to 5 pm.
• Shipping: We offer expedited shipping for koi with health checks and tracking for safe arrival.
For complete details, click here.
Refund Policy
Refund Policy
Live Fish:
- Due to the delicate nature of our fish, we cannot accept returns. However, we are committed to ensuring you receive your fish alive.
- Please ensure you are present during delivery to accept and sign for your fish.
- If, unfortunately, your fish arrives deceased, notify us within one hour of delivery. Send a digital photo as proof to champkoi@champkoi.com, and we'll replace it with another of equal value.
Non-Returnable Items:
- Chemicals, medications, water conditioners, and pond liners cannot be returned due to safety and quality reasons.
General Merchandise Returns:
- If you're not completely satisfied, you may return items within 14 days, subject to a 15% restocking fee. Note: shipping and handling costs are non-refundable.
- Items on sale or special deals, as well as special order items, cannot be returned.
- To ensure a smooth return:
- Items must be in unused, resellable condition.
- Original packaging, warranty books, manuals, parts, and accessories must be intact.
- For shipping, please encase the original packaging in another carton to prevent damage.
Return Process:
- Prior to returning any items, please obtain a Return Goods Authorization number (RGA) by contacting us. Have your invoice ready for reference.
- After inspection, we'll confirm acceptance of the returned merchandise.
Return Shipping:
- Customers cover return freight costs. If we made an error or the item is defective, we'll handle the freight charges.
- For orders with free shipping, the actual outgoing freight charge will be borne by the customer.
We're always here to help. Please reach out if you have any questions or concerns!
Polypropylene bulkhead fittings in 2", 3" and 4" — the sizes you need for bottom drains and large gravity returns.
Why polypropylene on the big sizes
Rigid PVC is strong but brittle. Polypropylene has considerably better impact resistance and more give, which matters on a large flange: a 4" bulkhead takes real torque going in, and PP tolerates that where PVC can crack. That's why the trade uses PP for the big penetrations and PVC for the small ones.
Important: these are threaded, not glued
Polypropylene cannot be solvent welded. These fittings are threaded on both ends, so you connect them with PVC male adapters and PTFE tape rather than gluing pipe straight in. Order your adapters at the same time — it's the part people forget and then can't finish the job.
Fitting it properly
- Gasket on the flange side, inside the pond. Nut on the dry side.
- Hand tight plus a fraction of a turn. Never wrench it.
- The hole is a good deal larger than the nominal size. Confirm the diameter before cutting — especially on a concrete wall.
- EPDM gaskets are the right choice for pond water and are what these normally ship with.
Why buy from ChampKoi?
ChampKoi has supplied koi keepers from our San Jose, California facility since 1998. Building a bottom drain? Talk to us before you pour concrete — it's the one part of a pond you can't redo later.
