Do not use this item for any installation or repair of potable water applications. This product does not comply with the "Safe Drinking Water Act," which requires that products meet low-lead standards in order to be used in systems providing water for human consumption (drinking or cooking). This item is for non-potable (non-human consumption) water applications only (irrigation, fire sprinkler, etc.) Series 009 Reduced Pressure Zone Assemblies prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure. It consists of bronze body construction (1/4 to 2 in., 8 to 50mm) or FDA approved epoxy coated cast iron (2 1/2 to 3 in., 65 to 80mm), two, in-line independent check valves, replaceable check seats with an intermediate relief valve, and ball valve test cocks. Series 009 is ideal for protection of health hazard cross-connections or for containment at the service line entrance. Check with local water authorities for installation requirements. Maximum Working Pressure: 175psi (12.06 bar).