Series LF288A Lead Free* Hot or Cold Water Anti-Siphon Vacuum Breakers prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage. They have a Lead Free* brass body construction (LF288A) or chrome finish (LF288AC), chemical resistant silicone seat disc, and an atmospheric vent to prevent spilling. Series LF288A has a full size orifice to assure pipe size capacity and maximum flow. It is ideal for low flow, non-continuous hot or cold water health hazard installations such as on laboratory equipment. Maximum Pressure:125psi (8.6 bar).