All Bronze Body and Bell Housing Provides Durability and Long Life; The Direct Acting Integral By-Pass Design Prevents Buildup of Excessive System Pressure Caused by Thermal Expansion. the Balanced Piston Design Enables the Regulator to React in a Smooth and Responsive Manner to Changes in System Flow Demand, While at the Same Time, Providing Protection from Inlet Pressure Changes; Water Savings; Lead-Free , Debris laden water systems lead to frequent PRV strainer cleanings. The Zurn Wilkins 600XL Water Pressure Reducing Valve features a separate strainer cap to speed up this task. It can be utilized in residential and commercial applications.