Special Order Bottom Drains w/8" dia sump, black cover, 2" FPT connection - Easy Pro with Stainless Steel Hardware - 2 drains feed into one 3" suction line.
A bottom drain is used on a pond which has a gravity fed filter system. Water and pond waste leave the pond via the bottom drain, travel along a.
It is generally accepted that 4 inch bottom drains are a must and should be fitted to all ponds under construction, those being modified.
Pond bottom drains come in many sizes ranging from 40mm to mm,they come in different qualitys also,we at blackburn house koi stock many of them as we.