Clean Check® extendable backwater valves prevent sewage backup into a residence or building as a result of a plugged sewer system, excess volume in the system or groundwater flooding. They are designed to be installed easily outside a home, business or other structure, without using a costly manhole, and are readily accessible for maintenance or cleaning. The extendable valves consist of a tee-shaped valve body, a top collar and a bottom collar with a replaceable PVC flapper attached. In the event of back-pressure, the flapper blocks the reverse flow and prevents a sewage backup. Clean Check® valves are available in ABS and PVC and in multiple sizes, to meet the needs of most residential and commercial construction. Verticle offset from upstream to downstream side is: 3 in. & 4 in. valves - 0.4 in., 6 in. valve - 0.5 in. US Patent No. 5,234,018.

Benefits:

• Easy to perform maintenance & inspection from ground level

• “Hands-off” cleaning
  

• Meets all model construction and plumbing codes
  

• NO costly manhole - direct bury up to 12 feet

• NO more backwater valves indoors which could be hidden by cabinets, stairwells or floor coverings
  

• NO more sewer gas or mess into the building during maintenance inspection