Clean Check® Backwater Valve Kit, Extendable, 4 in Nominal, ABS Body, Black, Domestic
Installs discretely outside - up to 12 ft below ground levelAbove ground outdoor maintenance accessibility eliminates hidden access indoor applications and the sewer odor and mess of indoor maintenancePrevents sewage backup into plumbed structures as a result of a plugged sewer system, excess volume in the system or groundwater flooding