This 1 in. lead free reduced pressure zone assembly is designed to prevent the backflow of polluted water from entering into the potable water supply due to back siphonage and or backpressure in accordance with national plumbing codes and water authority requirements. Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards and for contaminants at the service line entrance. This assembly consists of a lead free cast copper silicon alloy body, 1 in. NPT end connections, quarter turn ball valve shutoffs with tee handles, top mounted test cocks, 2 in-line independent check valves, captured springs, and replaceable check seats with an internal relief valve for reduced space requirements.Lead free bronze body construction for durability1 in. NPT inlet and outlet connectionsQuarter turn full port resilient seated ball valve shutoffsSingle access cover and modular check construction for the ease of maintenanceTop mounted test cocks and 2 in-line independent check valvesReplaceable check seats with an internal relief valve for reduced space requirementsLarge body passages provides a low pressure dropCaptured springs for safe maintenanceInternal relief valve for reduced installation clearances. This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.