The 1-1/2 in 375XL Reduced Pressure Principle Assembly offers high hazard protection against backsiphonage and backpressure in potable water applications. Most often used by irrigation contractors, the top benefits of the 375XL are its low lifecycle costs and the innovative EZSwap Pressure Vessel that saves you 15 minutes in repair and rebuild time, provides straightforward line flushing and quick winterization. Built with the same functions of our 975XL2 model, the 375XL can be used in the highest corrosive water environments