Overview & Design

Animation

The Mainline Fullport Backwater Valve is a normally open backwater valve. It allows non-restrictive sewage flow from the inlet to the outlet side of the valve, through flow channels incorporated on the gate and body. (This superior design prevents sewage buildup in body).

Overview, Design & Animation

The Mainline Fullport Backwater Valve is a "normally open" backwater valve. It allows non-restrictive sewage flow from the inlet to the outlet side of the valve, through flow channels incorporated on the gate and in the body. (This superior design prevents sewage buildup in body).

Upon a quick reversal sewer backsurge, flow is diverted to the gates 45-degree wings (incorporated on the sides of the gate) this causes an upward lifting action of the gate. Once the lift occurs, the reversal flow of water slams the gate into the closed position, isolating the entire plumbing system from backflow.

Upon a slow reversal backsurge, the gate is fitted with certified flotation devices that initiate the lifting of the gate. The reversal flow then pushes up on the bottom of the gate and closes it automatically isolating the system.

The Mainline Fullport Backwater Valve is also designed with a BUILT in CLEANOUT for the rodding of the building drain-sewer (first time ever in a backwater valve).