Irritrol 700-1 Ultra Flow Valve with Flow Control NPT Threaded, 1" Unique straight-through flow path - Provides extremely low friction loss Slow-closing design - Reduces water hammer and resulting stress on the system Tough glass-reinforced nylon, stainless steel and brass construction - Provides durability and long life High and low-flow operation - Ensures consistent performance in a variety of applications Self-flushing, 150-mesh, stainless steel filter screen on 1-, 11/2- and 2-inch models - Provides consistent operation