Pro-Flash Building Products sister company, Mainline Backflow Products are the professionals' choice for sewer protection. The 'Mainline Fullport Backwater Valve', the flagship product of the company, has won nationally recognized awards because of its normally open gate concept.
Fullport Backwater Valve
Established in 1997, this valve has revolutionized sewer protection across North America with its patented ‘normally open’ gate design. This valve is typically installed in homes or buildings that have basements, cellars, crawl spaces or area that are accessible for servicing. The normally open gate allows the sewer system to ‘vent’ any gases that may be causes by positive or negative pressures in the sewer line.
The 4963 has a ‘Clear View’ top that makes inspection of the valve quick and simple for the building owner or plumber! As well, the 4963 comes with an integral clean-out for rodding the sewer lateral. Should rodding from the stack be necessary, the snake can easily pass over the open gate and be retracted without doing any harm to the components.
ML-FR4 Retrofit Backwater Valve
The ML-FR4 is an ideal retrofit backwater valve due to a number of unique features. With a minimal fall of only 3/8” through the body and spigot ends, a retrofit installation is made easier and requires less concrete breaking. The gate and hinge are elevated keeping the mechanical components away from the sewage environment. Simply use an existing cleanout or install a new one in conjunction with the ML-FR4 to allow for in valve access.
The Adapt-a-ValveTM Extendible Backwater Valve was invented because there was a need to have easy access to enable servicing of backwater valves deeper than 2 feet. The Adapt-a-Valve not only made extendible backwater valves easy to install, inspect and service, but with the special gate slot molded right into the body, it could easily be used for ‘pressure’ testing the ground works by adding the Test Gate feature. Hence, the name Adapt-a-Valve – because it could be adapted to various functions!
Straight-Fit Backwater Valve
The Straight-Fit™ Backwater Valve features a patent pending flapper, designed to smoothly guide cleaning and surveying equipment through the valve, also allowing for safe withdrawal of the same, minimizing the risk of damage to the flapper.
The addition of a Smart- Curve™ snake guide also prevents damage to the valve body during snaking from the main access. The Straight-Fit™ Valve body design has minimal slope, making it ideal for new installations and retrofits.