Zurn Wilkins 34-975XLFT 3/4" RPZ Backflow Preventer, Bronze - 34-975XLFT
Wilkins 34-975XLFT is a 3/4" Reduced Pressure Zone (RPZ) backflow preventer engineered for high-hazard potable water protection. Its compact, serviceable design and robust bronze construction make it suitable for irrigation, fire protection cross-connection control, and commercial plumbing systems where reliable backflow prevention is required.
This unit is supplied as a 34-975XLFT model (less shutoff/ball valves). For installation, testing intervals, and repair parts, consult the included specification and installation/maintenance documents. Professional installation and annual testing by a certified backflow tester are recommended to ensure continued compliance with local codes.
Features
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Reduced pressure principle: Dual, spring-loaded checks with a differential relief valve provide dependable protection against backpressure and backsiphonage.
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Size & pressure: 3/4" inlet/outlet with a maximum working pressure of 175 psi for typical municipal and irrigation systems.
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Construction: Bronze body and corrosion-resistant internal components built for long-term durability in outdoor and buried installations.
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Connections: Male pipe thread configuration (less ball valves) for straightforward connection to existing piping; male 45° flair SAE test fitting for accurate testing.
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Serviceability: Modular design allows access to internal check assemblies and relief valve for field maintenance and repair without full removal.
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Approvals & listings: Manufacturer documentation lists ASSE 1013 and other common industry listings—refer to the product specification sheet for the complete set of certifications for this model.
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Typical applications: Irrigation systems, commercial plumbing, and other high-hazard installations requiring RPZ protection.
What our Experts Think
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High-level RPZ protection: Reduced Pressure Zone design prevents both back-siphonage and backpressure contamination, ideal for critical water safety applications.
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Compact wye-pattern body: Short lay length makes it easier to install in confined irrigation boxes and mechanical rooms.
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Lead-free bronze construction: Durable, corrosion-resistant body built for long service life in outdoor and commercial environments.
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Service-friendly internals: Separate access to check valves and relief components reduces maintenance time and labor costs.
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Reliable field performance: Designed for irrigation, fire protection tie-ins, and commercial potable water systems requiring code compliance.
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Installer-focused design: FNPT connections and modular assembly simplify installation and future servicing.
Q&A
Q: What is the Zurn Wilkins 34-975XLFT used for?
A: A 3/4" lead-free reduced pressure zone (RPZ) backflow preventer designed to protect potable water systems from high-hazard contamination caused by backpressure or backsiphonage.
Q: Is it approved for drinking water systems?
A: Yes. It is lead-free compliant and typically certified to NSF/ANSI 61 and ASSE 1013 standards for potable water protection.
Q: What level of protection does it provide?
A: High-hazard protection using a reduced-pressure principle assembly with two check valves and a relief valve that discharges if unsafe pressure conditions occur.
Q: What does “FT” mean in this model?
A: “FT” typically indicates factory-configured fittings (often test fittings and/or unions), making installation and field testing easier compared to base models.
Q: What are its materials and build quality?
A: Lead-free bronze body with corrosion-resistant internal components designed for durability in irrigation, commercial, and potable water systems.
Q: What are the typical operating limits?
A: Commonly rated up to 175 PSI working pressure and around 180°F maximum temperature (varies slightly by configuration).
Q: Where is it commonly used?
A: Irrigation systems, fire protection lines, and commercial plumbing installations requiring reliable RPZ-level cross-connection control.
Maintenance Tips
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