Zurn - 1" RPZ No "Y" Strainer

The Wilkins 1-375 Reduced Pressure Principle Assembly is a high-performance backflow preventer designed for use in potable water systems. Engineered to protect against both backsiphonage and backpressure of contaminated water, it is ideal for commercial and residential applications where a health hazard may exist. With its compact body, full port bronze ball valves, and FNPT threaded connections, this 1” assembly provides reliable, code-compliant protection while maintaining ease of installation and maintenance.

Key Features:

• Protects against backsiphonage and backpressure in potable water systems
• 1” FNPT threaded end connections for easy system integration
• Equipped with full port bronze ball valves
• Compact reinforced nylon housing with corrosion-resistant components
• Ideal for irrigation, commercial, or residential water supply protection

Construction & Durability:

• Body: Reinforced nylon, FDA-approved
• Fasteners & Springs: 300 series stainless steel
• Elastomers: Silicone and Buna N (FDA-approved)
• Internals: Delrin and NSF-listed nylon
• Ball Valves: Cast bronze, ASTM B584

Performance & Functionality:

• Maximum working pressure: 175 PSI
• Maximum water temperature: 180°F
• Hydrostatic test pressure: 350 PSI
• Rated flow (1”): Up to 27 GPM at 10 ft/sec
• Flow-tested and certified by USC Foundation for Cross-Connection Control

Ease of Installation & Use:

• Factory-installed full port QT ball valves (standard)
• Threaded FNPT end connections per ANSI B1.20.1
• Typical installation height: 12"–30" above drain for maintenance access
• Indoor or outdoor installation with adequate drainage

Technical Specifications:

• Model: 1-375
• Connection Type: 1” FNPT
• Dimensions (approx.): 15.25" length with ball valves
• Weight: 9.7 lbs with ball valves
• Certifications: ASSE 1013, CSA B64.4, AWWA C511, IAPMO
• UL and C-UL Classified (less shut-off valves)

Installation & Application:

• Recommended for irrigation systems, commercial facilities, and residential mains
• Mount 12”–30” above drain or grade per code
• Protective enclosure required for outdoor installs in freezing climates

Compatibility & Optional Accessories:

• Compatible with QT-SET Quick Test Kits and repair kits
• Not included but available for purchase separately: 1" Bronze Y-Strainer
• Not included but available for purchase separately: Red Brass Nipple

Ensure code-compliant protection of your potable water system with the Wilkins 1-375. Engineered for performance, safety, and easy maintenance, it’s a reliable solution trusted by contractors and facilities nationwide. Explore our full range of backflow accessories and parts to complete your system.