The Fernco CV-150T 1-1/4" OR 1-1/2" Threaded Sump Pump PVC Check Valve is engineered to create a positive seal and maximum flow from your sump pump's discharge. Our full-flow check valve system prevents back-flow into the pump, prolonging the life of your sump pump. Constructed of durable thermoplastic and paired with industry-leading Fernco PVC couplings for last-lasting performance. Installation is quick and easy with rust-resistant, stainless steel clamps, and fasteners. Each check valve is Proudly Made in the USA!