{"product_id":"1-rpz-backflow","title":"Zurn Wilkins 375 Reduced Pressure RPZ Backflow Preventer - 1\" 1-375","description":"\u003ch2\u003eZurn Wilkins 375 Reduced Pressure RPZ Backflow Preventer - 1\" 1-375 \u003c\/h2\u003e\n\u003cp\u003eThe Wilkins 375 Reduced Pressure Principle (RPZ) Backflow Preventer, model 1-375, is a 1-inch assembly engineered for high-hazard, non-potable applications. Rated to 175 PSI, this compact RPZ uses a serviceable pressure vessel and modular check assemblies to simplify maintenance and reduce downtime. Its flanged, epoxy-coated ductile iron body and durable internals are built for outdoor irrigation, fireline, and industrial use where protection against back-pressure and back-siphonage is required.\u003c\/p\u003e\n\u003cp\u003eRefer to the manufacturer specification sheet and installation manual for exact dimensions, connection options, and accessory part numbers. The standard 1-375 contains leaded components and is not intended for potable water systems; choose the 375XL lead‑free variant when low‑lead compliance is required. Have installation and annual testing performed by a licensed backflow technician to maintain compliance and reliable operation.\u003c\/p\u003e\n\u003ch5\u003eFeatures\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize \u0026amp; Capacity:\u003c\/strong\u003e 1-inch nominal size; maximum working pressure 175 PSI; compact form factor for tight installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eServiceability:\u003c\/strong\u003e EZSwap-style removable pressure vessel and modular checks allow faster flushing, easier servicing, and off‑line repairs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Epoxy-coated ductile iron body with durable internals and corrosion-resistant fasteners for long field life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications \u0026amp; Standards:\u003c\/strong\u003e ASSE 1013, IAPMO, CSA B64.4, and AWWA-compliant design (check specific listings for variants).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e Ideal for irrigation, landscape, commercial non-potable lines, and other high-hazard installations where lead-free certification is not required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eWhat our Experts Think\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"151k700\" data-start=\"223\" data-end=\"421\"\u003e\n\u003cstrong data-start=\"225\" data-end=\"248\"\u003eTrue RPZ protection\u003c\/strong\u003e: Uses a reduced pressure zone design to protect against both back-siphonage and backpressure contamination in potable water systems. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"g2b26i\" data-start=\"422\" data-end=\"633\"\u003e\n\u003cstrong data-start=\"424\" data-end=\"461\"\u003eHigh-hazard certified performance\u003c\/strong\u003e: Built for applications where contamination risk is significant, such as irrigation, fire protection, and industrial service lines. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1jm6fy5\" data-start=\"634\" data-end=\"815\"\u003e\n\u003cstrong data-start=\"636\" data-end=\"669\"\u003eServiceable modular internals\u003c\/strong\u003e: Features a replaceable pressure vessel and check assemblies for faster maintenance and reduced downtime. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1d8jzgs\" data-start=\"816\" data-end=\"1001\"\u003e\n\u003cstrong data-start=\"818\" data-end=\"856\"\u003eDurable, corrosion-resistant build\u003c\/strong\u003e: Epoxy-coated ductile iron body designed for long-term reliability and protection in harsh environments. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"l70839\" data-start=\"1002\" data-end=\"1153\"\u003e\n\u003cstrong data-start=\"1004\" data-end=\"1028\"\u003eCompact 1\" footprint\u003c\/strong\u003e: Ideal for tight mechanical spaces while still delivering full RPZ-level protection. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"kbbpu0\" data-start=\"1154\" data-end=\"1351\"\u003e\n\u003cstrong data-start=\"1156\" data-end=\"1192\"\u003eLow lifecycle maintenance design\u003c\/strong\u003e: Engineered for field serviceability, reducing long-term operating costs compared to fully non-serviceable assemblies.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\n\u003cbr\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003cp data-start=\"0\" data-end=\"228\"\u003e\u003cstrong data-start=\"0\" data-end=\"47\"\u003eQ: What is the Zurn Wilkins 1-375 used for?\u003c\/strong\u003e\u003cbr data-start=\"47\" data-end=\"50\"\u003eA: A 1\" lead-free reduced pressure zone (RPZ) backflow preventer designed to protect potable water systems from high-hazard contamination caused by backpressure or backsiphonage.\u003c\/p\u003e\n\u003cp data-start=\"230\" data-end=\"434\"\u003e\u003cstrong data-start=\"230\" data-end=\"275\"\u003eQ: Is it approved for drinking water use?\u003c\/strong\u003e\u003cbr data-start=\"275\" data-end=\"278\"\u003eA: Yes. It is lead-free compliant and certified to NSF\/ANSI 61 and ASSE 1013 standards for potable water protection. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"436\" data-end=\"675\"\u003e\u003cstrong data-start=\"436\" data-end=\"484\"\u003eQ: What level of protection does it provide?\u003c\/strong\u003e\u003cbr data-start=\"484\" data-end=\"487\"\u003eA: High-hazard protection using two check valves and a relief valve that discharges water if unsafe pressure conditions occur, preventing contaminated water from entering the clean supply.\u003c\/p\u003e\n\u003cp data-start=\"677\" data-end=\"924\"\u003e\u003cstrong data-start=\"677\" data-end=\"725\"\u003eQ: What makes the 375 series design notable?\u003c\/strong\u003e\u003cbr data-start=\"725\" data-end=\"728\"\u003eA: It uses a modular, serviceable pressure vessel system designed for easier flushing, testing, and maintenance, helping reduce downtime and service effort. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"926\" data-end=\"1140\"\u003e\u003cstrong data-start=\"926\" data-end=\"979\"\u003eQ: What are its pressure and performance ratings?\u003c\/strong\u003e\u003cbr data-start=\"979\" data-end=\"982\"\u003eA: Typically rated up to 175 PSI working pressure and suitable for standard potable water and irrigation applications. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1142\" data-end=\"1361\"\u003e\u003cstrong data-start=\"1142\" data-end=\"1180\"\u003eQ: What materials is it made from?\u003c\/strong\u003e\u003cbr data-start=\"1180\" data-end=\"1183\"\u003eA: Lead-free bronze or ductile iron body with corrosion-resistant internal components for long-term durability in demanding installations. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1363\" data-end=\"1557\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003cstrong data-start=\"1363\" data-end=\"1396\"\u003eQ: Where is it commonly used?\u003c\/strong\u003e\u003cbr data-start=\"1396\" data-end=\"1399\"\u003eA: Irrigation systems, commercial plumbing, fire protection lines, and other high-hazard cross-connection control applications requiring RPZ-level protection.\u003c\/p\u003e\n\u003ch5\u003e\n\u003cbr\u003eMaintenance Tips\u003c\/h5\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-WEB:15d07b9e-85e9-40b7-b286-42d6f6f630d0-17\" 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:15d07b9e-85e9-40b7-b286-42d6f6f630d0-17\" data-turn-id-container=\"request-WEB:15d07b9e-85e9-40b7-b286-42d6f6f630d0-17\" data-testid=\"conversation-turn-34\" 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=\"7fb3c883-e9da-480c-8d53-dfad29753a31\" 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\" data-turn-start-message=\"true\" 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=\"77\" data-end=\"825\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-section-id=\"fka6td\" data-start=\"77\" data-end=\"171\"\u003eSchedule \u003cstrong data-start=\"88\" data-end=\"116\"\u003eannual certified testing\u003c\/strong\u003e to verify proper backflow protection and compliance.\u003c\/li\u003e\n\u003cli data-section-id=\"1u8t85h\" data-start=\"172\" data-end=\"294\"\u003eInspect regularly for \u003cstrong data-start=\"196\" data-end=\"244\"\u003eleaks, relief valve discharge, and corrosion\u003c\/strong\u003e, especially after pressure surges or shutdowns.\u003c\/li\u003e\n\u003cli data-section-id=\"mbqzo7\" data-start=\"295\" data-end=\"403\"\u003eKeep \u003cstrong data-start=\"302\" data-end=\"361\"\u003eshutoff valves, test cocks, and internal passages clean\u003c\/strong\u003e to prevent debris-related malfunctions.\u003c\/li\u003e\n\u003cli data-section-id=\"10mkb86\" data-start=\"404\" data-end=\"501\"\u003eFlush the assembly periodically to reduce \u003cstrong data-start=\"448\" data-end=\"468\"\u003esediment buildup\u003c\/strong\u003e and maintain smooth operation.\u003c\/li\u003e\n\u003cli data-section-id=\"mu2ddg\" data-start=\"502\" data-end=\"610\"\u003eProtect from \u003cstrong data-start=\"517\" data-end=\"540\"\u003efreezing conditions\u003c\/strong\u003e using insulation or seasonal winterization when installed outdoors.\u003c\/li\u003e\n\u003cli data-section-id=\"1jcjx9r\" data-start=\"611\" data-end=\"738\"\u003eUse only \u003cstrong data-start=\"622\" data-end=\"683\"\u003egenuine \u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eZurn Wilkins\u003c\/span\u003e\u003c\/span\u003e repair kits\u003c\/strong\u003e to maintain certification and long-term performance.\u003c\/li\u003e\n\u003cli data-section-id=\"953lha\" data-start=\"739\" data-end=\"825\" data-is-last-node=\"\"\u003eAlways \u003cstrong data-start=\"748\" data-end=\"787\"\u003ere-test after any service or repair\u003c\/strong\u003e before returning the unit to service.\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","brand":"Zurn","offers":[{"title":"Default Title","offer_id":45805587398847,"sku":"1-375","price":521.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/5703\/0079\/files\/1-375-2.jpg?v=1782960593","url":"https:\/\/www.mybackyardzone.com\/products\/1-rpz-backflow","provider":"Your Outdoor Setup Starts Here","version":"1.0","type":"link"}