Thetford 94218 City Water Dish with Brass Check Valve – Polar WhiteThis Thetford 94218 in Black city water hatch features a one-piece brass check valve with 1/2 inch M.P.T. fitting. It is constructed of durable plastic for a long life and won’t rust, discolor, or fade, and is impact resistant. The dish measures 4-3/4-inches in diameter and the distance between the holes, center to center is 3-1/2-inches. Comes with a replacement rubber dust cover to keep dirt and debris from your fresh water supply. Factory Tested: Factory tested for zero leakageLB&B Molders: Cross-reference number 601-005-94219Standards: IAPMO, NSF, CSA, and TEI CertifiedAdditional InformationConnection TypeMPTCutout Diameter3-1/2″Outside Diameter4-3/4″Dish Depth3/4″Valve Depth2-1/2″ColorBlack