Zurn Wilkins 1-350 1 in 350 Double Check Backflow Preventer - EZSwap

Our review of the Zurn Wilkins 1-350 1 in 350 Double Check Backflow Preventer finds it best suited for contractors and property managers who need a durable, serviceable solution for low health hazard, non-potable applications. The single biggest reason to consider this model is the patented EZSwap removable pressure vessel, which greatly reduces repair time and cost by allowing service while the unit is off-line and enabling straightforward line flushing and winterization.

Key Features

• EZSwap removable pressure vessel: Lets technicians remove and replace the pressure vessel quickly for repairs without replacing the entire assembly, cutting maintenance time and parts cost.
• Flush Tool (FLUSH): Provides an easier line flushing procedure that can save up to 15 minutes per installation, speeding commissioning and service visits.
• Durable UV-resistant construction: Reinforced nylon pressure vessel resists corrosion and mineral build-up for longer life in outdoor irrigation or utility settings.
• Stainless steel hardware: Shut-off handles, struts, and hardware are corrosion-resistant to withstand wet, exposed installations.
• Water savings and winterization: Design facilitates quick winterization and reduces water use during maintenance and operation.

Who It's For

The 1 in 350 Double Check is aimed at irrigation contractors, commercial landscapers, and municipal maintenance crews who install and service backflow protection on irrigation and other non-potable lines. Its serviceable design and corrosion-resistant materials make it a practical choice for frequent outdoor use and cold climates that require winterization.

Those needing backflow protection for high health hazard or potable critical points should look at assemblies rated for higher hazards; this model is intended for low health hazard, non-potable applications where a double check valve assembly is appropriate.

Pros & Cons

Pros

• EZSwap vessel and removable components reduce repair time and lower lifecycle costs.
• Flush Tool simplifies line flushing and can save about 15 minutes during installation.
• Stainless steel hardware and UV-resistant nylon resist corrosion and mineral build-up outdoors.

Cons

• Designed for low health hazard, non-potable use only, so it is not suitable for high hazard potable protection.
• Replacement parts and specialized service tools may still be required for some repairs despite the EZSwap convenience.

Specifications

Our Verdict

The Zurn Wilkins 1-350 is a practical, cost-effective double check assembly for irrigation and other non-potable lines because it reduces labor and repair costs through the EZSwap system and built-in flushing aid. For contractors and maintenance teams who prioritize fast serviceability, corrosion resistance, and straightforward winterization, it offers strong value over the backflow lifecycle.

Frequently Asked Questions

Is this unit suitable for potable water protection?
No. The 1-350 is intended for low health hazard, non-potable applications and should not be used where a higher hazard rating is required.

Can the unit be serviced without shutting down the entire line?
Yes. The patented EZSwap removable pressure vessel allows portions to be serviced off-line, simplifying repairs and minimizing downtime.

Does it resist outdoor corrosion?
Yes. Stainless steel hardware and a UV-resistant reinforced nylon pressure vessel provide corrosion resistance and reduce mineral build-up in outdoor installations.