Mainline Fullport Backwater Valve Specifications
Model number #4963
Type I - intended for use in horizontal pipe runs to floor drains, building drains, sewers, holding tanks, etc.
Backwater valves should be used in building drainage systems whenever a risk of flooding due to sewer surcharge, back up, or failure exists.
- Backwater valves must be installed to ensure access for inspection or maintenance.
- Periodic inspection is important to maintain satisfactory performance of the backwater valve.
- The building owner must maintain and keep backwater valves in proper working order.
Body, Lid, Gate, Cleanout plug
Acrylonitrile-Butadiene-Styrene (ABS) Plastic
Stainless steel 1/4 x 3/4
1/4 stainless steel
Neoprene rubber ( Buna 50 durometer #241 )
Flat-section closed-cell gasket
Neoprene 3/16 x 3/8 (1220 RL BL x 1)
Closed-cell cross-linked polyethylene (PEX) foam
Why a Mainline Valve
How it Works
Mainline Backflow Products
Canadian Home Builders' Association
Mechanical Contractors Association of Alberta