This basic 3" bottom drain allows dirt and debris to be removed from the pond bottom without the hassle of vacuuming or drain-downs. Bottom drain base has six stainless screws and two rubber gaskets for a positive seal when penetrating liner! Connects to 3" PVC pipe and fittings.
Photo shows Bottom Drain with Diffuser. This item is the same, but without the air diffuser.
See the Extended Information tab for a copy of the bottom drain owners manual.