Guardian G1562 self-contained eyewash & drench hose unit is ideal where a continuous supply of potable water is not available. Two GS-Plus spray heads, each with a (flip top) dust cover, internal flow control and filter. 1/2 in. IPS chrome plated brass stay-open ball valve with flag handle. Pressure regulator controls eyewash flow to 0.65 GPM for 15 minutes. Drench hose has single GS-Plus spray head with (flip top) dust cover, internal flow control and filter. Chrome plated brass squeeze valve with stainless steel lever handle and 6 ft. reinforced PVC hose. To operate unit, fill with clean potable water and add bacteriostatic additive (supplied with unit). Additive protects against growth of bacteria, fungus, algae and acanthamoeba inside unit. After filling with water, pressurize unit to 80 PSI air pressure. If necessary, adjust pressure regulator to achieve maximum flow for fifteen minutes. Unit should be inspected regularly and water in unit should be changed at least once every six months. Filling instructions included. Weight is 35.6 lbs. empty, 118.9 lbs. filled.