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• The Mainline Fullport Backwater Valve has a built-in main sewer cleanout in the valve for the rodding of the sewer. • Since the Mainline Fullport backwater Valve is a "normally open" backwater valve, it allows unobstructed sewage flow, which in turn prevents sewage buildup in the valve's body.
Mainline Fullport Backwater Valve. The Mainline #4963 Full-Port Backwater Valve is the ‘flagship’ of the company. Established in 1997, this valve has revolutionized sewer protection across North America with its patented ‘normally open’ gate design.
Zurn Z1088 dura-coated cast iron body and cover with PVC flapper valve, bronze chec. Zurn Z1090 backwater valve, dura-coated cast iron body with no-hub inlet and outlet. Zurn Z1091 backwater valve with dura-coated cast iron body, hub inlet and open outl. Zurn Z1095 backwater valve with dura-coated cast iron body, hub inlet and offset sp.
A backwater valve will stop water or sewage from flowing into your house should the main sewer line become overloaded. In most cases, you can check to see if it’s working properly by looking through the clear cover on the backwater valve access box. Inside the valve is a small flap that is normally open allowing water to exit your home.
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, .ca
Model 4963 Mainline Fullport Backwater Valves - for use with 4" Schedule 40 drainage pipe. These valves are typically installed inside in the basement floor for easy access. If you need your installation to be flush with the basement floor level, it is recommended that you install this valve in an Access Box (available below).
The 'Mainline Fullport Backwater Valve', the flagship product of the company, has brought MBP several nationally recognized awards because of its normally open gate concept. In 1997 this valve won the 'Ivan R.Leger Award' as the most innovative product for that year as voted by the Canadian Institute of Plumbing and Heating.
Mainline Straight Fit Extendable Backwater Valves in ABS and PVC These 4" and 6" Backwater Valves drop less than 1/2" from Inlet to Outlet The newly crafted Mainline ML-SF668 Extendible Backwater Valve is a great choice for new and retrofit situations where a 6" valve is needed.
Products . Fullport Backwater Valve. The Mainline #4963 Full-Port Backwater Valve is the ‘flagship’ of the company. Established in 1997, this valve has revolutionized sewer protection across North America with its patented ‘normally open’ gate design.