The most versatile and complete solution for Aerated Koi Pond Bottom Drains! The Koi Toilet I Aerated 4" Bottom Drain features a 9" Flex Air Diffuser with built in Triple-check valve design prevents entry of liquid/solids in...

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

  • Flex Air Disc Diffusor with built in Triple-check valve design prevents entry of liquid/solids into air feed piping
  • 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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