This 4 inch PVC Hub x Hub Backwater Valve provides unrestricted flow and a threaded access that seals hand tight and allows for easy maintenance and inspection. Used to prevent backup in sewer lines. Hub x hub connection type.
The unique flapper creates a tighter seal than other backwater valves
Used to prevent backup in sewer lines
For gravity flow applications only
Valves can be adapted for standard, shallow-depth or deep-bury installations
Structurally rugged and molded from engineered resins to stand up to job site abuse