Tornado AirStorm Aerated Drain 4″ pressure (with 1″ air feed)

The Tornado Air-Storm bottom drain is a Premium quality aerated bottom drain for use in Koi ponds. ? Is has been manufactured using only high quality materials and uses a professional moulded drain lid with built-in air dome. ?The air supply to the dome is fixed inside the drain so no-need for any additional connections to the stem

4inch/1inch