{"product_id":"wilkins-1-d-c-backflow","title":"Zurn Wilkins 1\" 350 Double Check Backflow Assembly - 1-350","description":"\u003ch2\u003eZurn Wilkins 1\" 350 Double Check Backflow Assembly - 1-350\u003c\/h2\u003e\n\u003cp\u003eThe Wilkins 1\" 350 Double Check Backflow Valve Assembly is designed to protect non-potable irrigation and industrial systems from backflow contamination. Compact and serviceable, the 350 provides low health-hazard protection while minimizing downtime with maintenance-friendly features.\u003c\/p\u003e\n\u003cp\u003eIdeal for landscape irrigation and other non-potable systems where low-hazard protection is required, the Wilkins 350 balances dependable performance with straightforward maintenance. Refer to the supplied specification sheet for installation dimensions, test port locations, and local code requirements. For parts, service advice, or replacement cartridges, contact an authorized distributor or technical support.\u003c\/p\u003e\n\u003ch5\u003eFeatures\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\" size:\u003c\/strong\u003e Engineered for 1-inch connections commonly used in irrigation and commercial water lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble-check protection:\u003c\/strong\u003e Provides low health-hazard backflow prevention for non-potable applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull-port QT ball valves included:\u003c\/strong\u003e Integrated full-port shutoff valves for reliable isolation during service and testing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEZSwap removable pressure vessel:\u003c\/strong\u003e Enables safe, convenient line flushing, quick winterization and simplified repairs without complete disassembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eServiceability:\u003c\/strong\u003e Removable internals and accessible test ports make routine testing and maintenance straightforward for technicians.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocumentation available:\u003c\/strong\u003e Specification sheet and product literature are provided for code compliance, installation, and parts information.\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-1\" 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-1\" data-turn-id-container=\"request-WEB:2a39c126-ada6-4109-8eee-7ce7c559202b-1\" data-testid=\"conversation-turn-4\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--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=\"eddf9b4d-fa8e-42e8-a2b3-1e83f5b246e3\" 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=\"1370\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-section-id=\"53jwzt\" data-start=\"27\" data-end=\"279\"\u003e\n\u003cstrong data-start=\"29\" data-end=\"64\"\u003eReliable low-hazard protection:\u003c\/strong\u003e The \u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eZurn Wilkins 1-350 Double Check Backflow Assembly\u003c\/span\u003e\u003c\/span\u003e is a proven choice for preventing back-siphonage and backpressure in non-potable water systems like irrigation and commercial lines. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"vj5ci2\" data-start=\"280\" data-end=\"498\"\u003e\n\u003cstrong data-start=\"282\" data-end=\"312\"\u003eBuilt for code compliance:\u003c\/strong\u003e Commonly used where ASSE 1015 \/ CSA B64.5 standards are required, making it a dependable specification-grade option for inspectors and engineers. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1h9qtld\" data-start=\"499\" data-end=\"694\"\u003e\n\u003cstrong data-start=\"501\" data-end=\"526\"\u003eDurable construction:\u003c\/strong\u003e Cast bronze body with corrosion-resistant internal components designed for long-term service in demanding outdoor environments. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"dz67lq\" data-start=\"695\" data-end=\"859\"\u003e\n\u003cstrong data-start=\"697\" data-end=\"729\"\u003eMaintenance-friendly design:\u003c\/strong\u003e Integrated test cocks and shutoff valves allow easier testing, servicing, and seasonal maintenance without full system removal.\u003c\/li\u003e\n\u003cli data-section-id=\"24vryj\" data-start=\"860\" data-end=\"1062\"\u003e\n\u003cstrong data-start=\"862\" data-end=\"888\"\u003eIdeal application fit:\u003c\/strong\u003e Best suited for irrigation, fire protection, and other \u003cstrong data-start=\"944\" data-end=\"979\" data-is-only-node=\"\"\u003elow health-hazard water systems\u003c\/strong\u003e where full RPZ protection is not required. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1ku82ps\" data-start=\"1063\" data-end=\"1213\"\u003e\n\u003cstrong data-start=\"1065\" data-end=\"1095\"\u003eTrusted contractor choice:\u003c\/strong\u003e Widely used by plumbing professionals for its balance of durability, serviceability, and lifecycle cost efficiency.\u003c\/li\u003e\n\u003cli data-section-id=\"18sm2oa\" data-start=\"1214\" data-end=\"1370\" data-is-last-node=\"\"\u003e\n\u003cstrong data-start=\"1216\" data-end=\"1241\"\u003eImportant limitation:\u003c\/strong\u003e Not designed to regulate water pressure or replace a pressure-reducing valve—it only prevents reverse flow, not pressure spikes.\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\u003ch5\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003cp data-start=\"0\" data-end=\"210\"\u003e\u003cstrong data-start=\"0\" data-end=\"47\"\u003eQ: What is the Zurn Wilkins 1-350 used for?\u003c\/strong\u003e\u003cbr data-start=\"47\" data-end=\"50\"\u003eA: It provides backflow protection in low-hazard, non-potable water systems like irrigation, preventing contaminated water from entering the clean water supply.\u003c\/p\u003e\n\u003cp data-start=\"212\" data-end=\"409\"\u003e\u003cstrong data-start=\"212\" data-end=\"261\"\u003eQ: What type of backflow device is the 1-350?\u003c\/strong\u003e\u003cbr data-start=\"261\" data-end=\"264\"\u003eA: It is a Double Check Valve Assembly (DCVA), designed for protection against back-siphonage and backpressure in non-health-hazard applications.\u003c\/p\u003e\n\u003cp data-start=\"411\" data-end=\"620\"\u003e\u003cstrong data-start=\"411\" data-end=\"464\"\u003eQ: What are the key features of the 1\" 350 model?\u003c\/strong\u003e\u003cbr data-start=\"464\" data-end=\"467\"\u003eA: It includes a compact bronze body, dual check valves, full-port ball valves for isolation, and a serviceable design for easier maintenance and repair.\u003c\/p\u003e\n\u003cp data-start=\"622\" data-end=\"810\"\u003e\u003cstrong data-start=\"622\" data-end=\"674\"\u003eQ: Is it suitable for drinking water protection?\u003c\/strong\u003e\u003cbr data-start=\"674\" data-end=\"677\"\u003eA: It is intended for non-potable or low-hazard systems; it is not used where high-hazard contamination protection (RPZ) is required.\u003c\/p\u003e\n\u003cp data-start=\"812\" data-end=\"967\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003cstrong data-start=\"812\" data-end=\"849\"\u003eQ: Does it reduce water pressure?\u003c\/strong\u003e\u003cbr data-start=\"849\" data-end=\"852\"\u003eA: No, it is not a pressure-reducing valve. It only prevents reverse flow while maintaining normal system pressure.\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 damage to fittings and body.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTest annually to confirm proper double-check backflow prevention and code compliance.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFlush the assembly periodically to remove sediment and maintain smooth check operation.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eClean or replace internal check components if sticking, noise, or reduced flow occurs.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eReplace worn seals, gaskets, or O-rings with approved repair kits when needed.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eKeep unit accessible and protected from freezing to ensure reliable long-term performance.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Zurn","offers":[{"title":"Default Title","offer_id":45805587759295,"sku":"1-350","price":367.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/5703\/0079\/files\/1-350-2_6814c752-5051-4a18-98e8-54f0e3cd4f66.jpg?v=1782960300","url":"https:\/\/www.mybackyardzone.com\/products\/wilkins-1-d-c-backflow","provider":"Your Outdoor Setup Starts Here","version":"1.0","type":"link"}