The Zurn Wilkins 2‑975XL2 is a 2" reduced pressure principle assembly designed to protect potable water systems from backsiphonage and backpressure contamination. It is lead‑free, ASSE 1013 listed, and NSF/ANSI/CAN 61 & 372 certified for safe drinking water applications.
Key Installation Requirements:
- Install in horizontal orientation with adequate clearance for testing and servicing
- Provide drainage for relief valve discharge to prevent property damage
- Connect using threaded ANSI B1.20.1 end connections
- Ensure accessibility to test cocks and shut‑off valves
- Follow local codes and regulations for backflow prevention assemblies
Important Notes Before Installing:
- Do not install where continuous backpressure may occur without proper design
- Unit must be protected from freezing conditions; drain or insulate as required
- Annual testing and inspection are required to maintain compliance
- Relief valve discharge must remain unobstructed at all times
- Use only genuine Zurn Wilkins parts for repairs to ensure certification
Basic Installation Overview:
- Flush water lines thoroughly before installation to remove debris
- Install assembly in horizontal position with relief valve facing downward
- Connect inlet and outlet piping using threaded ANSI B1.20.1 fittings
- Provide air gap or drain line for relief valve discharge
- Pressurize system slowly and check for leaks
- Test device according to local backflow testing procedures
For complete step‑by‑step instructions, download the official Zurn Wilkins 975XL2 Installation & Maintenance Manual and the 975XL2 Spec Sheet.
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