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Wilkins 350 DCA Backflow Preventer 1 in. | WK350-100

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Sales Price $238.61 Our Price $377.14 You save 37%

Wilkins 350 DCA Backflow Preventer 1 in. 

  • Size: 1 inch
  • Max Working Pressure: 175 PSI
  • Type: Double Check Assembly Backflow

Features & Benefits

The 350 Double Check Backflow Preventer provides low health hazard protection in non-potable applications. The EZSwap™ removable pressure vessel provides safe and easy line flushing, quick winterization, and simple maintenance and repair.

  • EZSwap removable pressure vessel is quickly removed and replaced with Flush Tool (FLUSH) for simple line flushing to remove fouling debris
  • Labor savings from ease of flushing with only one person saves up to 15 minutes per installation
  • Quick and thorough winterization with Blow-Out Accessory prevents costly freeze damage and improves productivity when a freeze is quickly approaching
  • EZSwap Pressure Vessel can be removed and replaced in seconds, reducing repair cost and water system downtime
  • EZSwap Pressure Vessel is serviceable off-line and reusable, allowing maintenance and repairs to be performed in the safety of the work truck or shop
  • Durable UV resistant reinforced nylon EZSwap Pressure Vessel resists corrosion and mineral build-up to better withstand harsh outdoor conditions
  • Stainless steel shut-off valve handles, hardware, and struts resist corrosion
  • Reduced labor and repair kit costs yield savings of 75% or more during the backflow life-cycle

Product Details

Designed for installation on water lines to protect against both backsiphonage and backpressure of polluted water into the water supply. Assembly shall provide protection where a potential health hazard does not exist.

Standards Compliance | (Horizontal & Vertical)

  • ASSE Listed 1015
  • IAPMO 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 (fewer shut-off valves only)
  • C-UL Classified (fewer shut-off valves only)

Typical Installation
Local codes shall govern installation requirements. To be installed in accordance with the manufacturers’ instructions and the latest edition of the Uniform Plumbing Code. Unless otherwise specified, the assembly shall be mounted at a minimum of 12” (305mm) and a maximum of 30” (762mm) above adequate drains with sufficient side clearance for testing and maintenance. If installed below grade, be certain adequate drainage is provided to prevent the device from being submerged.

Capacity thru Schedule 40 Pipe

Pipe size 5 ft/sec  7.5 ft/sec 10 ft/sec 15 ft/sec
1/2" 5 7 9 14
3/4" 8 12 17 25
1" 13 20 27 40
1 1/4" 23 35 47 70
1 1/2" 32 48 63 95
2" 52 78 105 167
More Information
Brand Wilkins
Warranty 1 Year
Brochure (511.67 kB)
Repair Parts (295.19 kB)