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. Vertical offset from upstream to downstream side is: 3 in and 4 in valves - 0.4 in, 6 in valve - 1/2 in.

Clean Check® Backwater Valve Kit, Extendable, 4 in Nominal, ABS Body, Black, Domestic

• Installs discretely outside - up to 12 ft below ground level
• Above ground outdoor maintenance accessibility eliminates hidden access indoor applications and the sewer odor and mess of indoor maintenance
• Prevents sewage backup into plumbed structures as a result of a plugged sewer system, excess volume in the system or groundwater flooding

• Catalog https://www.hirsch.com//ASSETS/DOCUMENTS/ITEMS/EN/https://assets.unilogcorp.com/2/ITEM/DOC/RectorSeal_96901_Catalog.pdf
• Instruction/Installation Manual https://www.hirsch.com//ASSETS/DOCUMENTS/ITEMS/EN/https://assets.unilogcorp.com/2/ITEM/DOC/RectorSeal_96901_Manual.pdf
• Line Drawing https://www.hirsch.com//ASSETS/DOCUMENTS/ITEMS/EN/https://assets.unilogcorp.com/2/ITEM/DOC/Rectorseal_96921_Line_Drawing.pdf
• Specification Sheet https://www.hirsch.com//ASSETS/DOCUMENTS/ITEMS/EN/https://assets.unilogcorp.com/2/ITEM/DOC/RectorSeal_96901_Specification_Sheet.pdf
• Video Link https://www.youtube.com/watch?v=Z3IFOSdM1Y8