Bottom Drains are a must have for proper koi pond Keeping. The most versatile and complete solution for Aerated Koi Pond Bottom Drains! The Koi Toilet I Aerated 4" Bottom Drain features a 9" Air Diffuser and a 4" diameter pipe optimal for gravity fed systems. Excellent build quality, Built to last!
- Sweep bottom design to eliminate trapping debris.
- Screws are fully encapsulated in large and strong screw pockets.
- Threaded center column for easy installation and maintenance.
- Wide and thick flange for better liner grip.
- Full 4" height over horizontal discharge pipe.
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