Wilkins 975 XL RPZ Backflow Preventer Rebuild in Brooksville, FL
In December 2025, we completed a Wilkins 975 XL reduced pressure backflow preventer (RPZ) rebuild in Brooksville, Florida. RPZ backflow assemblies are a key part of cross-connection control, helping protect the potable water supply by preventing backflow and keeping plumbing systems aligned with common code and safety standards.
We began by isolating the assembly using the shutoff valves, relieving system pressure, and checking the device for visible signs of leakage, corrosion, and mineral buildup. A careful inspection helps pinpoint where performance is being lost—often around the check valves, relief valve, and internal sealing surfaces.
Next, we disassembled the unit and completed a full rebuild using manufacturer-appropriate parts for the Wilkins 975 XL. Typical rebuild components include new O-rings, rubber seals, springs, and check assemblies. We also use practical field tools like backflow wrenches, calibrated hand tools, and pressure gauges to keep the rebuild precise and dependable.
After reassembly, we slowly brought the system back online and verified stable operation—watching for leaks, confirming the checks are sealing, and ensuring the relief valve responds correctly. A properly rebuilt RPZ backflow preventer supports long-term reliability and safer water protection for the property.
Step 1: Inspection & Isolation
This image shows the RPZ backflow assembly at the start of service as we inspect shutoff valves, test points, and overall condition before isolating and depressurizing the system.
Step 2: Open-Up & Diagnose
Here we are inside the assembly examining internal check valves and sealing surfaces to identify wear, debris, or pressure-related issues affecting performance.
Step 3: Rebuild Components
This stage documents the rebuild using new O-rings, seals, springs, and check components to restore proper reduced pressure zone protection.
Step 4: Return to Service & Verify
After reassembly, the system is slowly repressurized and monitored for leaks, proper relief valve response, and stable backflow prevention performance.