Shoktrol Water Hammer Arresters are regularly furnished in all stainless steel construction. Pipe threads are accurately machined to assure tight connection. 3/4 in [19] male I.P.S. inlet is standard for the 100 and 200 size units, while 1 in [25] male I.P.S. inlet is standard for sizes 300 thru 600. Zurn® Shoktrol provide complete protection against water hammer in common pipe diameters for varying pipe lengths wherever flow velocity is subject to sudden change - in quick closing, solenoid-actuated valves used with lavatories and sinks, dishwashers, and residential automatic washers; in improperly adjusted water closet flush valves; in pumping systems, and in drinking fountains or similar installations where water flow is valved for intermittent operation. Each Shoktrol has its shock-absorbing air cushion hermetically sealed within the unit. Consequently, there is no loss of air from the Shoktrol due to leakage past worn elastomeric sealing surfaces nor due to permeation through elastomeric features. In addition, the Shoktrol 18-8 stainless steel construction makes it virtually immune to attack and degradation by high levels of chloramine and other common waterborne chemicals which quickly degrade elastomeric components.