Wilkins 1" 350XL

Item Number: 1-350XL
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$688.62
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Brand - Wilkins
  • Product Type: Double Check Valve Assembly
  • Weight: 10.0 lb
  • Size: 1 inch
  • Lead-Free Compliant: Yes (NSF/ANSI/CAN 61 & 372)
  • Maximum Working Pressure: 175 PSI
  • Maximum Working Temperature: 180°F
  • Body Material: Low Lead Cast Bronze
  • EZSwap® Removable Pressure Vessel for easy maintenance
  • ASSE® Listed 1015, CUPC® Listed, CSA® B64.5

Description

The Wilkins 1" 350XL Double Check Valve Assembly is a lead-free backflow preventer for potable water lines, protecting against backsiphonage and backpressure of polluted water in low health hazard applications. Its innovative EZSwap® removable pressure vessel simplifies maintenance, repairs, and winterization. Constructed with low lead cast bronze, reinforced nylon, and stainless steel, it offers corrosion resistance and UV durability for harsh outdoor conditions. This 1-inch model boasts a 175 PSI maximum working pressure and 180°F maximum temperature, meeting ASSE 1015, CUPC, CSA B64.5, and NSF/ANSI/CAN 61/372 standards. Item number 1-350XL.

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Connections

  • The 1-inch 350XL Double Check Valve Assembly features threaded end connections compliant with ANSI B1.20.1 for secure integration into your plumbing system.

Installation Notes

  • Local codes and manufacturer instructions, along with the latest Uniform Plumbing Code, must be followed.
  • Install at a minimum of 12 inches (305mm) and a maximum of 30 inches (762mm) above adequate drains, ensuring sufficient side clearance for testing and maintenance.
  • If installed below grade, adequate drainage must be provided to prevent submersion.
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Additional Details

The Wilkins 1" 350XL Double Check Valve Assembly is a lead-free backflow preventer designed for potable water applications. It protects against backsiphonage and backpressure of polluted water into the water supply where a potential health hazard does not exist.

This device features a unique plastic insert cartridge that houses both checks in a compact design, set within a bronze body. The checks are an inline modular design with self-contained assemblies.

Key Features

  • EZSwap® removable pressure vessel allows for simple, cost-effective maintenance, repairs, and line flushing.
  • Corrosion-resistant construction with stainless steel shut-off valve handles, hardware, and struts.
  • Durable UV resistant reinforced nylon EZSwap Pressure Vessel resists corrosion and mineral build-up, ideal for outdoor conditions.
  • Top-mounted test cocks provide easy installation.
  • Lead-free compliant design meets NSF/ANSI/CAN 61 and 372 requirements.
  • Ideal for situations requiring winterization, as the cartridge can be removed in freezing conditions. A blowout fitting is also available.

Specifications

General

  • Product Type: Double Check Valve Assembly
  • Model: 350XL
  • Size: 1 inch
  • End Connections: Threaded (ANSI B1.20.1)
  • Lay Length: 12.25 inches (311 mm)
  • Weight (with ball valves): 6.0 lbs (2.7 kg)

Performance

  • Maximum Working Water Pressure: 175 PSI
  • Maximum Working Water Temperature: 180°F
  • Hydrostatic Test Pressure: 350 PSI
  • Temperature Range: 33°F - 180°F

Materials

  • Main Valve Body: Low Lead Cast Bronze (ASTM B 584)
  • Housing: Reinforced Nylon
  • Fasteners: Stainless Steel, 300 Series
  • Elastomers: Silicone (FDA Approved), Buna Nitrile (FDA Approved)
  • Internals: Delrin
  • Springs: Stainless Steel, 300 Series
  • Ball Valves: Low Lead Cast Bronze (ASTM B 584)
  • Struts: Stainless Steel, 300 Series
  • Handles: Stainless Steel, 200 Series

Certificates & Approvals

  • ASSE® Listed 1015
  • CUPC® Listed
  • CSA® Certified B64.5
  • AWWA Compliant C510
  • Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California
  • UL® Classified (less shut-off valves only)
  • C-UL® Classified (less shut-off valves only)
  • Meets NSF/ANSI/CAN 61
  • Meets NSF/ANSI/CAN 372 (Less than 0.25% weighted average lead content)
  • IAPMO® Listed

FAQs

What is the primary use of the Wilkins 1" 350XL Double Check Valve Assembly?

It is primarily used in potable water lines to protect against backsiphonage and backpressure of polluted water in applications where a potential health hazard does not exist.

Is the Wilkins 1" 350XL compliant with lead-free regulations?

Yes, the 1" 350XL is lead-free compliant, meeting the requirements of NSF/ANSI/CAN 61 and 372 (less than 0.25% weighted average lead content).

What makes the EZSwap® pressure vessel a key feature?

The EZSwap® removable pressure vessel allows for simple, cost-effective maintenance, repairs, straightforward line flushing, and quick winterization, reducing service time and costs.

What is the maximum operating pressure and temperature for this device?

The Wilkins 1" 350XL has a maximum working water pressure of 175 PSI and a maximum working water temperature of 180°F.

What certifications does this backflow preventer hold?

It is ASSE® Listed 1015, CUPC® Listed, CSA® Certified B64.5, AWWA Compliant C510, and meets NSF/ANSI/CAN 61 and 372 standards.