WATER DISTRIBUTION SYSTEM Where two water districts are connected, the valve limits flow rate between the two. FILTER BACKWASH CONTROL Installed in the backwash line, the valve limits flow rate during the backwash cycle to prevent filter media blow out.

Operates automatically off line pressure. Heavy-duty, nylon-reinforced diaphragm. Rectangular-shaped, soft seat seal provides drip-tight Class VI closure. Diaphragm assembly guided top and bottom. Throttling seat retainer for flow and pressure stability. Easily maintained without removal from the line. Replaceable seat ring. Alignment pins assure proper reassembly after maintenance. Valves are factory tested. Valves are serial numbered and registered to facilitate replacement parts and factory support.