RectorSeal 4 in. ABS Clean Check Extended Backwater Valve

Prevents sewage backup into plumbed structures as a result of a plugged sewer system, excess volume in the system or groundwater flooding. It prevents sewage backup into plumbed structures as a result of a plugged sewer system, excess volume in the system or groundwater flooding. In-ground flapper eliminates costly manholes.|No manhole required|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|Meets IPC, UPC/IAPMO, ICC, IRC, CSA plumbing codes