The Wilkins 375XL Reduced Pressure Zone Assembly is the lead free version of the Wilkins 350. It features a unique plastic insert cartridge that houses both checks and relief valve in a compact design and sets into a bronze body. The checks are inline modular design, with self contained check assemblies. Ideal for situations that require winterization, as the whole cartridge can be removed in freezing conditions. A blowout fitting is also available for ease of system winterization. This device is Lead Free Compliant.