3" UNISEAL Flexible Tank Adapter (Bulkhead)

The most versatile and complete solution for Aerated Koi Pond Bottom Drains! The Koi Toilet I Aerated 3" Bottom Drain features a 9" Air Diffuser with built in Triple-check valve design prevents entry of liquid/solids into air feed piping for low maintenance operation and a 3" diameter pipe. Excellent build quality, Built to last! A 4" version is also available.

Integrated 9" Air Diffuser with built in Triple-check valve design prevents entry of liquid/solids into air feed piping for low maintenance operation
Sweep bottom design to eliminate trapping debris.
Threaded center column for easy installation and maintenance.
Wide and thick flange for better liner grip.
Full 4" height over horizontal discharge pipe.
Integrated 9" Air Diffuser with built in Triple-check valve design prevents entry of liquid/solids into air feed piping for low maintenance operation
Sweep bottom design to eliminate trapping debris.
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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Koi Toilet I Aerated Bottom Drain - 3 Inch;