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KOITOILET I AERATED BOTTOM DRAIN 4"
The most versatile and complete solution for Aerated Koi Pond Bottom Drains!
Sweep bottom design to eliminate trapping debris.
Full 4" height over horizontal discharge pipe.
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.
Slanted air dome and high quality disk diffuser with internal check valve functions.