Wilkins 1-350 | Double Check Valve Backflow Preventer
Wilkins 1-350 | Double Check Valve Backflow Preventer is backordered and will ship as soon as it is back in stock.
Shipping
Shipping
🚚✨ Free Shipping in the Continental U.S.
All Products. No Minimums.
Estimated Shipping Times:
Important Note on Delivery Times
All shipping estimates provided are approximate only. While we always strive to meet or exceed your delivery expectations, we cannot guarantee the exact delivery times listed.
For time-sensitive orders, please contact us directly so we can provide a more accurate lead time estimate based on your specific requirements.
Same Day Shipping
All in stock orders received before 3PM EST will ship the same day. Orders received after 3PM EST will ship the following business day.
Water Filters, Hand Dryers, & Indoor Bottle Fillers are our most popular in stock items.
Outdoor Tubular Drinking Fountains
Evergreen normally ships in 5-15 days. Black, Gray and Blue ship in 2-4 weeks.
Ice Machines
In stock units ship within 48 hours. Other units normally ship in 2-4 weeks.
Other
Orders that ship directly from a manufacturer normally have a firm shipping estimate but those dates are subject to change due to manufacturer production, inventory or shipping. We do our best to estimate ship dates but orders shipping directly from the manufacturer can have unexpected delays. We will confirm tracking information when orders ship directly from a manufacturer but may not have updates or estimates beyond the original estimate. Once your order is placed with the manufacturer, it may not be able to be cancelled even if it hasn't shipped yet.
Please contact support@bottlefillingstations.com to confirm delivery time for a specific product or quantity. Or to inquire about an existing order.
Special Case Shipping Rates
Please note that shipping rates are subject to change at any time. We reserve the right to charge an additional fee in addition to the regularly advertised shipping fee for shipping to remote areas not easily accessible by typical freight carrier means (i.e. islands only accessible by ferry). If your order falls into this category, you will be notified upon receipt of your order, and have the option to complete the purchase with additional fee or to cancel the order. Please note, these instances are very rare, as most locations are reachable by regular freight. If you have any questions, please contact us!
Key Terms & Conditions
Exceptions may apply to islands and other remote territories.
All orders shipped by the carrier of our choice.
The Wilkins 1-350 is a double check valve assembly designed for backflow prevention in low to moderate hazard applications, providing reliable protection against both backsiphonage and backpressure.
Key Specifications:
- Size: 1 Inches
- Maximum Working Water Pressure: 175 PSI
- Maximum Working Water Temperature: 180°F
- Notable Certifications: ASSE 1015, CSA B64.5, AWWA C510
- End Connections: Threaded ANSI B1.20.1
Other Related Variants:
- 112-350: 1 1/2 Inches model size
- 114-350: 1 1/4 Inches model size
- 2-350: 2 Inches model size
- 34-350: 3/4 Inches model size
Materials:
- Cast Bronze main valve body (3/4" - 1"), ASTM B 584
- Reinforced Nylon housing
- Stainless Steel fasteners, 300 Series
- Silicone elastomers (FDA Approved)
- Buna Nitrile elastomers (FDA Approved)
- Delrin internals, NSF Listed
- Stainless Steel springs, 300 Series
- Cast Bronze ball valves, ASTM B 584
- Stainless Steel struts, 300 Series
- Stainless Steel handles, 300 Series
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 inches (305mm) and a maximum of 30 inches (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.
Standards Compliance:
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)
Features & Benefits:
- Dual Protection: Protects against both backsiphonage and backpressure of polluted water into the water supply.
- Serviceable Design: First and second checks are accessible for maintenance without removing the Zurn 1-350 device from the line.
- Durable Construction: Built with cast bronze and reinforced nylon components, stainless steel fasteners, and FDA-approved elastomers for long-lasting performance.
- Versatile Configuration: Available with optional full port QT ball valves, integral test fittings, lead-free strainer, and blow out/flush fitting options.
FAQ
Q: What applications is the Wilkins 1-350 suitable for?
A: The Wilkins 1-350 is designed for installation on water lines where a potential health hazard does not exist, providing protection in low to moderate hazard applications.
Q: What is the hydrostatic test pressure rating for the Zurn 1-350?
A: The hydrostatic test pressure rating is 350 PSI, while the maximum working water pressure is 175 PSI.
Q: Can this device be installed vertically?
A: Yes, the assembly is approved for both horizontal and vertical installation and complies with ASSE 1015 standards in both orientations.
NOTICE: Do not use with water that is unsafe or of unknown quality without adequate disinfection either before or after the system.
"Hydrate Everyone, Everywhere!" BottleFillingStations.com | Contact us
Always consult with a licensed professional and check local codes before installation. For further details, check the Owners Manual.
Contact us at support@bottlefillingstations.com with any questions.




