2-975XL - 2" 975XL Reduced Pressure Principle Backflow PreventerThe Zurn Wilkins 975XL Reduced Pressure Principle Backflow Preventer provides high hazard protection for non potable water applications. The wye pattern, bronze body provides separate access to each check valve and the relief valve for servicing. The 2" 975XL Reduced Pressure Principle Backflow Preventer is used on non potable water applications for high health hazard protection from both backsiphonage and backpressure of contaminated water into the