1.25 950 DC OSY NPT TOP ACCESS NON POTABLE
Item Number: 114-950XLTOSY
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Brand - Wilkins
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- Nominal Size: 1 1/4 inch
- Maximum Working Pressure: 175 PSI
- Maximum Working Temperature: 180°F
- End Connections: Threaded (NPT)
- Main Valve Body: Cast Bronze ASTM B 584
- Top access check covers for easy maintenance
- Protects against backsiphonage and backpressure
- Approved for non-potable applications only
Description
Description
The Zurn Wilkins 950XLT Double Check Valve Assembly (114-950XLTOSY) is a 1 1/4 inch threaded backflow preventer designed for non-potable water applications. It protects potable water systems from pollution caused by backsiphonage and backpressure. Key features include corrosion-resistant cast bronze construction, stainless steel fasteners, and top access check covers for easy maintenance. The assembly is ASSE 1015, cUPC, and AWWA C510 listed, with a maximum working pressure of 175 PSI and temperature of 180°F. Its design allows for straightforward repairs and can be installed in standard meter boxes, making it a reliable choice for water system protection.
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Connections and Installation
- The Zurn Wilkins 950XLT features threaded end connections (ANSI B1.20.1) for secure installation into your piping system.
- It is designed for horizontal installation, with vertical flow-up also approved for 1 1/4" to 2" sizes.
- Installation must comply with local codes, manufacturer's instructions, and the Uniform Plumbing Code.
- The assembly should be mounted a minimum of 12" and a maximum of 30" above adequate drains.
- Ensure sufficient side clearance for testing and maintenance. If installed below grade, provide adequate drainage to prevent submersion.

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Additional Details
The Zurn Wilkins Model 950XLT Double Check Valve Assembly is designed to protect potable water supplies from pollution caused by backsiphonage and backpressure, suitable exclusively for non-potable water applications.
This backflow preventer features top access check covers for straightforward maintenance and includes a test cock plug to safeguard against fouling from debris.
Features
- Top access check covers for easy maintenance and repair access
- Designed for non-potable water applications only
- Protects against both backsiphonage and backpressure of polluted water
- Includes a test cock plug to prevent fouling by insects, dirt, and debris
- Corrosion-resistant construction with stainless steel springs and fasteners
- Fully replaceable seats and silicone seal rings for reduced maintenance costs
- Suitable for below grade installation in standard valve boxes
- First and second checks are located at a 45° angle and accessible from the top
Materials
- Main Valve Body: Cast Bronze ASTM B 584
- Access Covers: Cast Bronze ASTM B 584
- Fasteners: Stainless Steel, 300 Series
- Elastomers: Silicone, Buna Nitrile
- Polymers: Noryl™
- Springs: Stainless steel, 300 Series
- Ball Valve Handles: Stainless steel
- Test Cock Cover: Plastic
Specifications
- Product Type: Double Check Valve Assembly
- Model: 950XLT
- Nominal Size: 1 1/4 inch
- Maximum Working Water Pressure: 175 PSI
- Maximum Working Water Temperature: 180°F
- Hydrostatic Test Pressure: 350 PSI
- End Connections: Threaded (ANSI B1.20.1)
Valves
- Type: Full Port Ball Valves
Materials
- Main Valve Body: Cast Bronze ASTM B 584
- Access Covers: Cast Bronze ASTM B 584
- Fasteners: Stainless Steel, 300 Series
- Elastomers: Silicone, Buna Nitrile
- Polymers: Noryl™
- Springs: Stainless steel, 300 Series
- Ball Valve Handles: Stainless steel
- Test Cock Cover: Plastic
Certificates & Approvals
- ASSE® Listed 1015
- cUPC® Listed
- AWWA Compliant C510
- CSA® Certified B64.5
- NYC MEA 426-89-M VOL 3
- Approved by Foundation for Cross Connection Control and Hydraulic Research at USC
- IAPMO® Listed
FAQs
What is the primary application for the Zurn Wilkins 950XLT Double Check Valve Assembly?
This backflow preventer is designed for installation on water lines to protect against backsiphonage and backpressure of polluted water into the potable water supply, specifically for non-potable applications only.
Can this backflow preventer be used with potable (drinking) water?
No, the Zurn Wilkins 950XLT is explicitly designed for non-potable water applications only. It protects potable water from a non-potable source, but the device itself is for non-health hazard situations.
What are the key maintenance features of the 950XLT?
The 950XLT features top access check covers for easy maintenance and repair. Its seats and silicone seal rings are fully replaceable, helping to reduce long-term maintenance costs.
What materials are used in the construction of the main components?
The main valve body and access covers are made from Cast Bronze ASTM B 584. Fasteners, springs, and ball valve handles are constructed from stainless steel for corrosion resistance, and elastomers include Silicone and Buna Nitrile.
What certifications does the Zurn Wilkins 950XLT hold?
The 950XLT is ASSE® Listed 1015, cUPC® Listed, AWWA Compliant C510, CSA® Certified B64.5, NYC MEA 426-89-M VOL 3, and IAPMO® Listed. It is also approved by the Foundation for Cross Connection Control and Hydraulic Research at USC.