Zurn Wilkins 112-975XL Reduced Pressure Backflow Preventer - 1-1/2 in - 112-975XL

Zurn Wilkins 112-975XL Reduced Pressure Backflow Preventer - 1-1/2 in - 112-975XL

The Wilkins 112-975XL (975XL series) Reduced Pressure Principle backflow preventer provides reliable high-hazard protection for potable water systems. Designed for irrigation, commercial, and fire-protection applications, this serviceable assembly combines a cast bronze wye-pattern body with corrosion-resistant internals for durability and easy maintenance.

Includes manufacturer specification sheet, installation and maintenance instructions, and parts lists. Order includes the backflow assembly only; valves, adapters, and additional accessories sold separately. For repair kits and detailed service procedures, consult Zurn Wilkins documentation or contact a certified installer.

Features

• Model/SKU: 112-975XL (975XL series), nominal size 1-1/2 in, threaded FNPT end connections for standard pipe fittings.
• Performance: 175 psi maximum operating pressure; temperature rating to 180°F; hydrostatic test 350 psi (typical).
• Construction: Cast bronze wye-pattern body with stainless-steel fasteners and springs; replaceable check and relief valve seats.
• Serviceability: Top-access checks and relief valve for simplified on-site maintenance; compatible repair kits available to extend service life.
• Installation benefits: Wye-pattern and short lay length reduce installation space and labor; suitable for domestic irrigation, commercial plumbing, and fire-protection lines.
• Compliance: Manufactured to industry standards and listings (ASSE, IAPMO, AWWA where applicable); follow local codes for approved installations.

What our Experts Think

• High-hazard RPZ protection: The Zurn Wilkins 112-975XL is a 1-1/2" Reduced Pressure Principle (RPZ) backflow preventer designed to protect potable water systems from both back-siphonage and backpressure contamination.
• Critical safety performance: Built for applications where water safety is essential—such as irrigation, commercial plumbing, and fire protection systems requiring high-level cross-connection control.
• Durable bronze construction: Heavy-duty cast bronze body with corrosion-resistant internal components ensures long service life in demanding commercial environments.
• Service-friendly wye design: Wye-pattern layout with separate access to check valves and relief valve simplifies maintenance and reduces downtime during servicing.
• Compact installation footprint: Short lay length makes it easier to install or replace in tight mechanical spaces without major system modification.
• Code-compliant reliability: Commonly specified for systems requiring ASSE 1013 compliance and approval under major plumbing and water safety standards.
• Contractor-trusted choice: Widely used by professionals for its proven durability, predictable performance, and ease of field maintenance in high-risk potable water applications.

Q&A

Maintenance Tips

• Inspect regularly for leaks, corrosion, and relief valve discharge activity.
• Test annually by a certified tester to ensure proper reduced pressure backflow prevention and code compliance.
• Flush the assembly periodically to reduce sediment buildup in check valves and relief components.
• Clean strainers and internal parts to maintain consistent flow and reliable operation.
• Replace worn seals, O-rings, or check modules with approved repair kits as needed.
• Maintain clear access for inspection, testing, and servicing, and protect from freezing conditions.