10 450 DC DI BODY, N-PATTERN, GRV X GRV, LESS GATE VALVES
Item Number: 10-450L
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Brand - Wilkins
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- Zurn Wilkins Model 450 Double Check Valve Assembly
- Nominal Size: 10 inch
- End Connections: Grooved
- Configuration: N-Pattern, Less Shut-Off Valves
- Main Body Material: Epoxy-Coated Ductile Iron
- Maximum Working Pressure: 175 PSI
- Maximum Working Temperature: 140° F
- NSF/ANSI/CAN 61 Lead-Free Compliant
Description
Description
The Zurn Wilkins 10 inch Model 450 Double Check Valve Assembly is an N-Pattern backflow preventer with grooved connections, designed for low health hazard applications in potable water lines. It protects against backsiphonage and backpressure, making it ideal for compact and retrofit installations. Featuring an epoxy-coated ductile iron body and stainless steel components, this assembly offers durability and corrosion resistance. Its patented Compound Check ensures reliable performance with low headloss. It is ASSE 1015 Listed and NSF/ANSI/CAN 61 Lead-Free compliant.
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Connections
- This Zurn Wilkins Model 450 Double Check Valve Assembly features grooved end connections, suitable for direct connection to grooved piping systems.
- It is designed to connect to steel pipe with grooved fittings.

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Additional Details
The Zurn Wilkins Model 450 Double Check Valve Assembly is a 10 inch backflow preventer designed for installation on potable water lines. It protects against both backsiphonage and backpressure of polluted water into the potable water supply in low health hazard applications. This specific model features an N-Pattern configuration with grooved end connections and is supplied less shut-off valves.
Application & Performance
- Designed for potable water systems to prevent contamination from backsiphonage and backpressure.
- Provides protection where a potential health hazard does not exist.
- Ideal for new and retrofit installations in compact locations due to its N-Pattern design.
- Features a patented, center-stem guided Compound Check for low headloss and reliable performance.
- Convenient single access cover reduces maintenance downtime.
Materials
- Main body and access covers constructed from corrosion-resistant, epoxy-coated ductile iron (ASTM A536 Grade 4).
- FDA Approved fusion epoxy finish on coatings.
- Fasteners and springs are made from Stainless Steel, 300 Series.
- Elastomers include EPDM (FDA approved) and Buna Nitrile (FDA approved).
- Polymers are NORYL™.
Specifications
- Model: Zurn Wilkins Model 450
- Type: Double Check Valve Assembly
- Nominal Size: 10 inch
- Configuration: N-Pattern
- End Connections: Grooved (for steel)
- Shut-Off Valves: Less shut-off valves
- Main Body Material: Ductile Iron (ASTM A536 Grade 4, epoxy coated)
- Access Cover Material: Ductile Iron (ASTM A536 Grade 4, epoxy coated)
- Coating: FDA Approved fusion epoxy finish
- Fastener Material: Stainless Steel, 300 Series
- Spring Material: Stainless Steel, 300 Series
- Elastomers: EPDM (FDA approved), Buna Nitrile (FDA approved)
- Polymer Material: NORYL™
- Maximum Working Water Pressure: 175 PSI
- Maximum Working Water Temperature: 140° F
- Hydrostatic Test Pressure: 350 PSI
Certificates & Approvals
- ASSE® Listed 1015
- IAPMO® Listed
- CSA® Certified B64.5
- AWWA Compliant C510
- AWWA Compliant C550
- UL® Classified
- C-UL® Classified
- FM® Approved
- NYC MEA 213-99-M VOL 3
- Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California
- Meets NSF/ANSI/CAN 61* (0.25% Max. Weighted Average Lead Content)
FAQs
What is the primary application of the Zurn Wilkins Model 450 Double Check Valve Assembly?
It is designed for installation on potable water lines to protect against backsiphonage and backpressure of polluted water, specifically in low health hazard applications where a potential health hazard does not exist.
What type of connections does this specific 10-inch Model 450 have?
This 10-inch Zurn Wilkins Model 450 (SKU 10-450L) features grooved end connections, designed for use with steel piping systems.
What is the maximum working pressure and temperature for this device?
The maximum working water pressure is 175 PSI, and the maximum working water temperature is 140° F.
Does this model include shut-off valves?
No, this specific variant (SKU 10-450L) is supplied "less shut-off valves" as indicated by the product name and options.
What certifications does the Zurn Wilkins Model 450 hold?
The Zurn Wilkins Model 450 is ASSE® Listed 1015, IAPMO® Listed, CSA® Certified B64.5, AWWA Compliant C510 and C550, UL® Classified, C-UL® Classified, FM® Approved, and meets NSF/ANSI/CAN 61* for lead-free requirements.