Zurn Wilkins 34-950XLT 3/4" Top-Access Double Check Valve (FNPT x FNPT) - 34-950XLT
The Wilkins 34-950XLT is a 3/4" top-access double-check valve assembly engineered for reliable backflow prevention in potable and low-hazard systems. Its compact cast-bronze body fits standard meter boxes for below-grade installation and provides easy, top-side service access without removing the assembly.
This assembly meets common industry approvals for double-check devices and is supported by available repair kits and detailed installation and maintenance documentation. Replacement parts and repair kits are offered to service checks and seals in the field; the top-access covers reduce downtime and allow in-place servicing. Review the product specification and installation instructions before installing below grade, and follow local codes for backflow prevention and testing.
Features
- 3/4" FNPT x FNPT female threaded connections for in-line installation in standard meter boxes.
- Cast bronze body with stainless-steel fasteners and FDA-approved elastomers for long-term durability.
- Top access check covers and tethered test cock caps simplify inspection, testing, and maintenance.
- 175 PSI working pressure, 180°F maximum operating temperature, and 350 PSI hydrostatic test rating.
- Designed to protect potable water from back-siphonage and back-pressure; commonly used in irrigation and light commercial applications.
What our Experts Think
Q&A
Q: What is the Zurn Wilkins 34-950XLT 3/4" Top-Access Double Check Valve (FNPT x FNPT) used for?
A: It prevents backflow contamination in low- to moderate-hazard potable water systems such as irrigation, hose connections, and small commercial plumbing lines.
Q: What type of backflow preventer is the 34-950XLT?
A: It is a Double Check Valve Assembly (DCVA) designed to protect against back-siphonage and backpressure in non-health-hazard applications.
Q: What does “top-access” design mean?
A: It allows internal components to be serviced from the top without removing the entire valve, reducing maintenance time and labor costs.
Q: What are key features of this model?
A: Lead-free XLT construction, FNPT x FNPT connections, dual independent check valves, and compact inline design for tight installations.
Q: Where is it commonly installed?
A: Residential and commercial irrigation systems, water distribution lines, and other approved potable water protection applications.
Q: Does it require maintenance?
A: Yes, periodic inspection and testing are required to ensure proper sealing and compliance with local plumbing and safety codes.
Maintenance Tips
- Inspect regularly for leaks, corrosion, or abnormal pressure behavior.
- Test annually to ensure proper double-check backflow prevention and code compliance.
- Use top-access design for convenient servicing without full removal of the valve.
- Flush the system periodically to reduce sediment buildup and maintain smooth operation.
- Clean or replace internal check components if sticking or reduced flow is observed.
- Replace worn seals, O-rings, or internal kits with approved parts when needed.
- Protect from freezing and maintain clear access for routine maintenance and testing.
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