Pond Drains » KoiToilet Drains » KoiToilet I

Sweep bottom design to eliminate trapping debris.
Full 4" height over horizontal discharge pipe.
1" Air supply connection at the bottom through center column.
Screws are fully encapsulated in large and strong screw pockets.
Threaded center column for easy disassemble and maintenance.
Wide and thick flange for better liner grip.
Slanted air dome and high quality air diffuser with internal check valve function.

Koi Toilet I now comes in 3" size.