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(Fast shipping - both ABS and PVC full port valves are in stock,
competitively priced, and they are available for immediate shipment)
Widespread precipitation has recently caused many a basement flood. Don't chance basement drain flooding and the possibility of raw sewage in your basement Check out our backflow protection products today.
 
 Mainline Model # 4963 A (ABS) & Model # 4963 P (PVC) fullport back water valves.
Backwater valve has a clear acrylic top for easy inspection and cleaning. Fullport (normally open) design does not restrict flow; it's virtually self-cleaning.
No problems with blockages that top hinge gates experience.
 Backwater valve gate closes automatically when sewer starts to back up
Built in screw on / off main sewer cleanout cap.
Cleaning rods and sewer snakes don't harm the gate when feeding or retrieving cleanout cables.
The Mainline Fullport Backwater Valve's normally open design allows the free circulation of air throughout your plumbing system into the main sewer system line.
Innovative award winning technology voted best new product (Showcase Gold Winner) by the Canadian Institute of Plumbing and Heating. Affordable building drain backup protection
Learn more about the problems with sewage backup & basement drains and basement mold.
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