{"product_id":"wilkins-3-4-d-c-backflow","title":"Zurn Wilkins 34-350 3\/4\" Double Check Backflow Preventer with EZSwap Vessel - 34-350","description":"\u003ch2\u003eZurn Wilkins 34-350 3\/4\" Double Check Backflow Preventer with EZSwap Vessel - 34-350\u003c\/h2\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecs \u0026amp; documentation:\u003c\/strong\u003e 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.\u003c\/p\u003e\n\u003cp\u003eEngineered 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.\u003c\/p\u003e\n\u003ch5\u003eFeatures\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eEZSwap removable pressure vessel allows off-line servicing and fast replacement with the Flush Tool, reducing repair time and downtime.\u003c\/li\u003e\n\u003cli\u003eFull-port quarter-turn ball shut-off valves provide positive isolation for maintenance; stainless-steel handles and hardware resist corrosion.\u003c\/li\u003e\n\u003cli\u003eTop-mounted fast test cocks enable straightforward annual testing and field maintenance without removing the unit from the line.\u003c\/li\u003e\n\u003cli\u003eLead-free\/low-lead construction suitable for potable water; bronze body for 3\/4\" sizes and reinforced nylon vessel deliver durability and corrosion resistance.\u003c\/li\u003e\n\u003cli\u003eCertified to ASSE 1015, AWWA C510, CSA B64.5, cUPC and NSF\/ANSI 61; rated to 175 psi and 180°F for broad application use.\u003c\/li\u003e\n\u003cli\u003eCompatible with optional blow-out\/winterizing accessories and designed to reduce labor and water usage during line flushing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eWhat our Experts Think\u003c\/h5\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-WEB:2a39c126-ada6-4109-8eee-7ce7c559202b-6\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:2a39c126-ada6-4109-8eee-7ce7c559202b-6\" data-turn-id-container=\"request-WEB:2a39c126-ada6-4109-8eee-7ce7c559202b-6\" data-testid=\"conversation-turn-12\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-3 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\" class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"51cfe1ff-0dba-479e-9ed0-92f79f54dd0d\" data-turn-start-message=\"true\" dir=\"auto\" data-message-model-slug=\"gpt-5-3-mini\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cul data-start=\"27\" data-end=\"1491\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-section-id=\"j7n0r2\" data-start=\"27\" data-end=\"251\"\u003e\n\u003cstrong data-start=\"29\" data-end=\"58\"\u003eSmart compact protection:\u003c\/strong\u003e The Zurn Wilkins 34-350 Double Check Backflow Preventer is designed for reliable low-hazard protection in residential and commercial irrigation systems. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1wctbk1\" data-start=\"253\" data-end=\"470\"\u003e\n\u003cstrong data-start=\"255\" data-end=\"288\"\u003eEZSwap maintenance advantage:\u003c\/strong\u003e Its patented EZSwap® removable pressure vessel allows fast off-line servicing, flushing, and winterization—reducing downtime and labor costs. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1d4q5bb\" data-start=\"472\" data-end=\"692\"\u003e\n\u003cstrong data-start=\"474\" data-end=\"510\"\u003eBuilt for real-world durability:\u003c\/strong\u003e UV-resistant reinforced nylon vessel combined with corrosion-resistant internal components ensures long service life in outdoor environments. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"chk7fx\" data-start=\"694\" data-end=\"881\"\u003e\n\u003cstrong data-start=\"696\" data-end=\"725\"\u003eEfficient serviceability:\u003c\/strong\u003e Designed so technicians can replace or service key internal parts without removing the full assembly from the line. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"124tm90\" data-start=\"883\" data-end=\"1076\"\u003e\n\u003cstrong data-start=\"885\" data-end=\"916\"\u003eCode-compliant performance:\u003c\/strong\u003e Commonly specified for ASSE 1015 applications in non-potable systems like irrigation and commercial water distribution. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1bpycmk\" data-start=\"1078\" data-end=\"1266\"\u003e\n\u003cstrong data-start=\"1080\" data-end=\"1114\"\u003eFreeze \u0026amp; maintenance friendly:\u003c\/strong\u003e Supports easier winterization and blow-out procedures, helping reduce seasonal damage risks in colder climates. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"15cixhb\" data-start=\"1268\" data-end=\"1491\" data-is-last-node=\"\"\u003e\n\u003cstrong data-start=\"1270\" data-end=\"1300\"\u003eInstaller-approved choice:\u003c\/strong\u003e Frequently selected by contractors for its balance of reliability, easy maintenance, and cost-effective lifecycle performance in 3\/4\" irrigation setups\u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv aria-hidden=\"true\" class=\"pointer-events-none -mt-px h-px translate-y-[calc(var(--scroll-root-safe-area-inset-bottom)-14*var(--spacing))]\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch5\u003e\n\u003cbr\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003cp data-start=\"0\" data-end=\"242\"\u003e\u003cstrong data-start=\"0\" data-end=\"104\"\u003eQ: What is the Zurn Wilkins 34-350 3\/4\" Double Check Backflow Preventer with EZSwap Vessel used for?\u003c\/strong\u003e\u003cbr data-start=\"104\" data-end=\"107\"\u003eA: It prevents backflow contamination in low-hazard potable water systems like irrigation, hose bibs, and small commercial water lines.\u003c\/p\u003e\n\u003cp data-start=\"244\" data-end=\"421\"\u003e\u003cstrong data-start=\"244\" data-end=\"285\"\u003eQ: What type of device is the 34-350?\u003c\/strong\u003e\u003cbr data-start=\"285\" data-end=\"288\"\u003eA: It is a Double Check Backflow Preventer (DCVA) designed to stop back-siphonage and backpressure in non-health-hazard applications.\u003c\/p\u003e\n\u003cp data-start=\"423\" data-end=\"603\"\u003e\u003cstrong data-start=\"423\" data-end=\"463\"\u003eQ: What is the EZSwap vessel system?\u003c\/strong\u003e\u003cbr data-start=\"463\" data-end=\"466\"\u003eA: EZSwap allows quick internal check assembly replacement, reducing downtime and simplifying maintenance without removing the full unit.\u003c\/p\u003e\n\u003cp data-start=\"605\" data-end=\"781\"\u003e\u003cstrong data-start=\"605\" data-end=\"653\"\u003eQ: What are key features of the 3\/4\" 34-350?\u003c\/strong\u003e\u003cbr data-start=\"653\" data-end=\"656\"\u003eA: Compact design, lead-free construction, dual check valves, isolation ball valves, and service-friendly modular components.\u003c\/p\u003e\n\u003cp data-start=\"783\" data-end=\"938\"\u003e\u003cstrong data-start=\"783\" data-end=\"816\"\u003eQ: Where is it commonly used?\u003c\/strong\u003e\u003cbr data-start=\"816\" data-end=\"819\"\u003eA: Residential irrigation systems, small commercial plumbing lines, and other low-risk potable water protection setups.\u003c\/p\u003e\n\u003cp data-start=\"940\" data-end=\"1103\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003cstrong data-start=\"940\" data-end=\"986\"\u003eQ: Does it require testing or maintenance?\u003c\/strong\u003e\u003cbr data-start=\"986\" data-end=\"989\"\u003eA: Yes, periodic backflow testing and inspection are required to ensure compliance and proper sealing performance.\u003c\/p\u003e\n\u003ch5\u003e\n\u003cbr\u003eMaintenance Tips\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eInspect regularly for leaks, corrosion, or signs of external damage.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTest annually to verify proper double-check backflow prevention and code compliance.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUse EZSwap vessel feature for faster servicing and reduced downtime during maintenance.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFlush the system periodically to minimize sediment and debris buildup.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eReplace worn seals, O-rings, or check modules using approved repair kits when needed.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eKeep the assembly accessible and protected from freezing conditions for reliable performance.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Zurn","offers":[{"title":"Default Title","offer_id":45805587038399,"sku":"34-350","price":448.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/5703\/0079\/files\/34-350-2_8615304a-5650-41cb-8993-b34a07730e7c.jpg?v=1782960455","url":"https:\/\/www.mybackyardzone.com\/products\/wilkins-3-4-d-c-backflow","provider":"Your Outdoor Setup Starts Here","version":"1.0","type":"link"}