The 1 1/4" Flomatic RPZE reduced pressure zone assembly was in production from 1993-2012. Devices may be tagged "RPZ" or "RPZE". Fully testable, it is a single cover bronze body device. RPZE models are constructed of lead free bronze. Checks are modular style and held in place with spring loaded wire retainers. The relief valve sits directly beneath the cover and is under spring tension. This device has been discontinued and only rubber repair parts are available.