Wilkins 34-350 3/4" Double Check Backflow Preventer with EZSwap Vessel

The Wilkins 34-350 3/4" Double Check Backflow Preventer provides reliable protection against backpressure and backsiphonage in potable and non-potable systems. Built for quick service and long-term outdoor use, it combines a bronze pressure body (3/4") with the patented EZSwap® removable pressure vessel to simplify flushing, repair, and winterization.

• EZSwap removable pressure vessel allows off-line servicing and fast replacement with the Flush Tool, reducing repair time and downtime.
• Full-port quarter-turn ball shut-off valves provide positive isolation for maintenance; stainless-steel handles and hardware resist corrosion.
• Top-mounted fast test cocks enable straightforward annual testing and field maintenance without removing the unit from the line.
• Lead-free/low-lead construction suitable for potable water; bronze body for 3/4" sizes and reinforced nylon vessel deliver durability and corrosion resistance.
• Certified to ASSE 1015, AWWA C510, CSA B64.5, cUPC and NSF/ANSI 61; rated to 175 psi and 180°F for broad application use.
• Compatible with optional blow-out/winterizing accessories and designed to reduce labor and water usage during line flushing.

Specs & documentation: Nominal size 3/4", full-port connections, typical length ~11" and height ~5.6". Includes installation and maintenance instructions, repair parts lists, and specification sheets for installers and contractors. Backed by a 1-year limited warranty; consult provided documents for ordering parts and approved installations.

Engineered for contractors and facility managers, the 34-350 minimizes service trips and replacement costs with serviceable internals and proven materials. For installation guidance, testing procedures, and parts diagrams, see the linked specification and repair manuals supplied with the product.