US Standard RV Black & Grey Tank Valves Compatible with GrenTec, Blade, Valterra, Bristol,Camco and Anonda Valves. PLEASE PAY ATTENTIONTHIS IS A SINGLE VALVE KITS ,ANY FLANGE FITTINGS NOT INCLUDED RV Black Tank valve Suit for 3-inch RV Sewer Pipes If You Need to Open and Close the Sewer System,and 3-inch Diameter for Valve Discharge Waste Water Freely When the Valve Is in Open Position. RV Sewer Valve Gate Made of Heavy-Duty & UV Inhibitors ABS Plastic. Durable and Long Lasting. PLEASE PAY ATTENTIONTHIS IS A SINGLE VALVE KITS ,ANY FLANGE FITTINGS NOT INCLUDED Our : Any Issues Don't Hesitate to , We Will Reply Your Message within 24 Hours Until You . RV Dump Valve Is a Solution for Replacement or Add a New RV Gate Valve to Install on Your RV's Black/Grey Water Sewer Tanks. (Patent Pending)