{"product_id":"upvc-pvc-check-valve-solvent-weld-20-90mm-non-return-pipe-fitting","title":"UPVC PVC Rückschlagventil Innen Ø 25 32 40 50 63 75 90 110 mm Rohr Klebefittings","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eUPVC PVC Check Valve — Solvent-Weld Non-Return Fitting for Reliable Backflow Prevention\u003c\/h2\u003e\n    \u003cp\u003eWhen a failed check valve lets water reverse through your pipework, the results range from contaminated supply lines to flooded pump chambers. Plumbers, irrigation contractors, and DIY homeowners who need a dependable UPVC PVC check valve for solvent-weld pipe systems will find this fitting engineered to hold flow direction under continuous pressure without relying on external power or manual intervention.\u003c\/p\u003e\n    \u003cp\u003eEach fitting is manufactured from rigid unplasticised PVC (UPVC), offering resistance to corrosion, scale build-up, and most common chemicals found in water supply and drainage applications. The solvent-weld socket ends accept standard metric pipe in inner diameters of 20 mm (DN15), 25 mm (DN20), 32 mm (DN25), 40 mm (DN32), 50 mm (DN40), 63 mm (DN50), 75 mm (DN65), and 90 mm (DN80) — equivalent to approximately ¾ in through 3½ in nominal bore. A spring-loaded disc mechanism closes automatically when flow stops or reverses.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include inline backflow prevention on submersible pump discharge lines, non-return protection in rainwater harvesting systems, and check-valve duties on irrigation zone headers where pressure differentials could otherwise cause siphoning. The solvent-weld connection method makes this fitting suitable for buried or concealed pipework where threaded joints are impractical.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-compat\"\u003e\n    \u003cspan class=\"hdiy-compat-icon\"\u003e⚙️\u003c\/span\u003e\n    Compatible with standard metric UPVC\/PVC solvent-weld pipe — inner diameters 20 mm to 90 mm (DN15–DN80). Verify pipe OD and schedule before ordering.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003ch2\u003e✅ Key Features of These UPVC PVC Solvent-Weld Check Valves\u003c\/h2\u003e\n    \u003cul class=\"hdiy-list\"\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003eAutomatic non-return action\u003c\/strong\u003e — spring-loaded disc closes immediately when flow stops or reverses, preventing backflow without manual operation.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🧪\u003c\/span\u003e \u003cstrong\u003eRigid UPVC construction\u003c\/strong\u003e — resists corrosion, chlorine, mild acids, and scale; maintains dimensional stability across typical water-system temperature ranges (typically up to 60 °C \/ 140 °F).\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e \u003cstrong\u003eSolvent-weld socket ends\u003c\/strong\u003e — clean, permanent bond using standard PVC cement; suitable for buried, concealed, or continuously wet installations where threaded joints are unsuitable.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e \u003cstrong\u003eEight size options\u003c\/strong\u003e — inner diameters from 20 mm (DN15) to 90 mm (DN80) cover the majority of residential and light-commercial pipe schedules; select by inner diameter to match your existing pipework.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e💧\u003c\/span\u003e \u003cstrong\u003eLow cracking pressure\u003c\/strong\u003e — disc opens at low differential pressure, minimising flow restriction in gravity-fed and low-head pump systems.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cstrong\u003eFlexible quantity options\u003c\/strong\u003e — available in packs of 1 to 5 units per order, allowing single-fitting replacements or multi-zone installations without overstocking.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ch2\u003e📐 Technical Specifications — UPVC PVC Solvent-Weld Check Valve\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eInline check valve (non-return valve)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eConnection Type\u003c\/th\u003e\n\u003ctd\u003eSolvent-weld socket (both ends)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eRigid UPVC (unplasticised polyvinyl chloride)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eColour\u003c\/th\u003e\n\u003ctd\u003eGrey\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eInner Diameter Range\u003c\/th\u003e\n\u003ctd\u003e20 mm – 90 mm (DN15 – DN80)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eAvailable Sizes\u003c\/th\u003e\n\u003ctd\u003e20 mm (DN15), 25 mm (DN20), 32 mm (DN25), 40 mm (DN32), 50 mm (DN40), 63 mm (DN50), 75 mm (DN65), 90 mm (DN80)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eValve Mechanism\u003c\/th\u003e\n\u003ctd\u003eSpring-loaded disc (swing\/disc type)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMax. Working Temperature\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMax. Working Pressure\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFlow Direction\u003c\/th\u003e\n\u003ctd\u003eUnidirectional (marked on body)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eStandard Compliance\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003eSee variant options (1–5 units)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eWeight per Unit\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-faq\"\u003e\n    \u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I choose the correct size check valve for my pipe?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMatch the inner diameter (ID) of the valve to the outer diameter (OD) of your pipe according to the standard metric UPVC pipe schedule. For example, a 32 mm (DN25) valve accepts pipe with a 32 mm outer diameter. If you are unsure, measure the outside of your existing pipe and cross-reference with the DN nominal bore chart. When in doubt, contact us with your pipe OD and we can confirm the correct size.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan this check valve be installed in any orientation?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThis fitting is designed primarily for horizontal installation, which allows the spring to function correctly and the disc to seat reliably under gravity. Vertical installation with upward flow is also supported. Vertical downward-flow installation is not recommended, as gravity may assist backflow against the spring. Always observe the flow-direction arrow marked on the valve body.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs UPVC suitable for hot water or high-temperature applications?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eRigid UPVC is rated for cold and warm water service, typically up to approximately 60 °C (140 °F) at reduced pressure. It is not suitable for steam lines or continuous hot-water circulation above this threshold. For higher-temperature applications, consider CPVC or ABS fittings. If your system operates near the upper temperature limit, contact us to confirm suitability before ordering.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat adhesive should I use for the solvent-weld connection?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eUse a PVC solvent cement rated for pressure pipe applications (e.g., a medium-bodied, fast-set PVC cement conforming to ASTM D2564 or equivalent). Clean and dry both the pipe end and socket interior, apply a thin even coat of cement to both surfaces, push firmly together with a slight twist, and hold for 30 seconds. Allow the joint to cure fully — typically 24 hours at room temperature — before pressurising the system.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWill this valve prevent backflow in a submersible pump installation?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. Installing a UPVC check valve on the discharge line of a submersible pump prevents water from draining back into the well or sump when the pump stops, protecting the pump from water-hammer and reducing restart load. Select the size that matches your discharge pipe inner diameter. For deep-well applications where column pressure is high, verify the valve's rated working pressure against your static head before installation.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow does this fitting compare to a threaded (BSP) check valve?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eSolvent-weld fittings create a permanent, leak-free bond that is structurally stronger than threaded connections in plastic pipe systems and eliminates the risk of thread-joint weeping over time. They are the preferred choice for buried pipework, concealed installations, and systems subject to vibration. Threaded valves are more suitable where future disassembly is required. If you need a removable valve, consider a union-ended or flanged check valve instead.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I order multiple sizes in a single transaction?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eEach product listing covers one inner diameter size with quantity options of 1 to 5 units. To order multiple sizes, add each size variant to your cart separately. If you need larger quantities or a mixed-size assortment for a project, contact us and we can advise on bulk ordering options.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-cta\"\u003e\n    🛒 Select your inner diameter and quantity above, then add to cart.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose the correct size check valve for my pipe?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Match the inner diameter (ID) of the valve to the outer diameter (OD) of your pipe according to the standard metric UPVC pipe schedule. For example, a 32 mm (DN25) valve accepts pipe with a 32 mm outer diameter. If you are unsure, measure the outside of your existing pipe and cross-reference with the DN nominal bore chart.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can this check valve be installed in any orientation?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This fitting is designed primarily for horizontal installation. Vertical installation with upward flow is also supported. Vertical downward-flow installation is not recommended. Always observe the flow-direction arrow marked on the valve body.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is UPVC suitable for hot water or high-temperature applications?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Rigid UPVC is rated for cold and warm water service, typically up to approximately 60 °C (140 °F) at reduced pressure. It is not suitable for steam lines or continuous hot-water circulation above this threshold.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What adhesive should I use for the solvent-weld connection?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Use a PVC solvent cement rated for pressure pipe applications. Clean and dry both surfaces, apply cement to both the pipe end and socket, push firmly together with a slight twist, hold for 30 seconds, and allow 24 hours cure time before pressurising.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will this valve prevent backflow in a submersible pump installation?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Installing a UPVC check valve on the discharge line of a submersible pump prevents water from draining back when the pump stops, protecting the pump from water-hammer and reducing restart load.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How does this fitting compare to a threaded (BSP) check valve?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Solvent-weld fittings create a permanent, leak-free bond stronger than threaded connections in plastic pipe systems and eliminate the risk of thread-joint weeping. They are preferred for buried pipework and concealed installations.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I order multiple sizes in a single transaction?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Each listing covers one inner diameter size with quantity options of 1 to 5 units. To order multiple sizes, add each size variant to your cart separately. Contact us for bulk or mixed-size orders.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"50mm (DN40) \/ 1","offer_id":52331625709842,"sku":"GLFBZRGBSGD00375x1","price":50.85,"currency_code":"USD","in_stock":true},{"title":"63mm (DN50) \/ 1","offer_id":52331625742610,"sku":"GLFBZRGBSGD00376x1","price":40.11,"currency_code":"USD","in_stock":true},{"title":"63mm (DN50) \/ 2","offer_id":52331625775378,"sku":"GLFBZRGBSGD00376x2","price":79.14,"currency_code":"USD","in_stock":true},{"title":"32mm (DN25) \/ 1","offer_id":52331625808146,"sku":"GLFBZRGBSGD00377x1","price":17.34,"currency_code":"USD","in_stock":true},{"title":"32mm (DN25) \/ 2","offer_id":52331625840914,"sku":"GLFBZRGBSGD00377x2","price":33.58,"currency_code":"USD","in_stock":true},{"title":"32mm (DN25) \/ 3","offer_id":52331625873682,"sku":"GLFBZRGBSGD00377x3","price":40.51,"currency_code":"USD","in_stock":true},{"title":"32mm (DN25) \/ 4","offer_id":52331625906450,"sku":"GLFBZRGBSGD00377x4","price":53.71,"currency_code":"USD","in_stock":true},{"title":"32mm (DN25) \/ 5","offer_id":52331625939218,"sku":"GLFBZRGBSGD00377x5","price":66.9,"currency_code":"USD","in_stock":true},{"title":"40mm (DN32) \/ 1","offer_id":52331625971986,"sku":"GLFBZRGBSGD00378x1","price":25.55,"currency_code":"USD","in_stock":true},{"title":"40mm (DN32) \/ 2","offer_id":52331626004754,"sku":"GLFBZRGBSGD00378x2","price":40.46,"currency_code":"USD","in_stock":true},{"title":"40mm (DN32) \/ 3","offer_id":52331626037522,"sku":"GLFBZRGBSGD00378x3","price":60.18,"currency_code":"USD","in_stock":true},{"title":"40mm (DN32) \/ 4","offer_id":52331626070290,"sku":"GLFBZRGBSGD00378x4","price":79.9,"currency_code":"USD","in_stock":true},{"title":"75mm (DN65) \/ 1","offer_id":52331626103058,"sku":"GLFBZRGBSGD00381x1","price":57.73,"currency_code":"USD","in_stock":true},{"title":"75mm (DN65) \/ 2","offer_id":52331626135826,"sku":"GLFBZRGBSGD00381x2","price":114.44,"currency_code":"USD","in_stock":true},{"title":"90mm (DN80) \/ 1","offer_id":52331626168594,"sku":"GLFBZRGBSGD00382x1","price":101.12,"currency_code":"USD","in_stock":true},{"title":"20mm (DN15) \/ 1","offer_id":52331626201362,"sku":"GLFBZRGBSGD00383x1","price":8.96,"currency_code":"USD","in_stock":true},{"title":"20mm (DN15) \/ 2","offer_id":52331626234130,"sku":"GLFBZRGBSGD00383x2","price":16.85,"currency_code":"USD","in_stock":true},{"title":"20mm (DN15) \/ 3","offer_id":52331626266898,"sku":"GLFBZRGBSGD00383x3","price":24.74,"currency_code":"USD","in_stock":true},{"title":"20mm (DN15) \/ 4","offer_id":52331626299666,"sku":"GLFBZRGBSGD00383x4","price":32.63,"currency_code":"USD","in_stock":true},{"title":"20mm (DN15) \/ 5","offer_id":52331626332434,"sku":"GLFBZRGBSGD00383x5","price":33.03,"currency_code":"USD","in_stock":true},{"title":"25mm (DN20) \/ 1","offer_id":52331626365202,"sku":"GLFBZRGBSGD00384x1","price":12.5,"currency_code":"USD","in_stock":true},{"title":"25mm (DN20) \/ 2","offer_id":52331626397970,"sku":"GLFBZRGBSGD00384x2","price":23.87,"currency_code":"USD","in_stock":true},{"title":"25mm (DN20) \/ 3","offer_id":52331626430738,"sku":"GLFBZRGBSGD00384x3","price":35.21,"currency_code":"USD","in_stock":true},{"title":"25mm (DN20) \/ 4","offer_id":52331626463506,"sku":"GLFBZRGBSGD00384x4","price":38.28,"currency_code":"USD","in_stock":true},{"title":"25mm (DN20) \/ 5","offer_id":52331626496274,"sku":"GLFBZRGBSGD00384x5","price":47.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Bild1von5_286e87e4-df8c-4d81-b8ef-537c1b545273.jpg?v=1781925677","url":"https:\/\/homediyer.com\/products\/upvc-pvc-check-valve-solvent-weld-20-90mm-non-return-pipe-fitting","provider":"HomeDIYer","version":"1.0","type":"link"}