Fernco CV-150 1-1/2-Inch or 1-1/4-Inch by 1-1/2-Inch or 1-1/4-Inch Sump Pump Check Valve Installs with Fernco flexible couplings for fast and easy installation Full flow positive sealing flapper design Durable thermoplastic body Heavy duty for long life Flexible couplings can be flipped over to fit 1-1/4-Inch or 1-1/2-Inch drain pipe