{"product_id":"pvc-check-valve-25-40mm-one-way-non-return-valve-water-adhesive-pipe-fittings","title":"PVC Check Valve  25 - 75mm One Way Non-return Valve Water Adhesive Pipe Fittings","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003ePVC Check Valve — One-Way Non-Return Flow Control for Water \u0026amp; Irrigation Systems\u003c\/h2\u003e\n    \u003cp\u003eBackflow is one of the most common causes of contamination and pressure loss in residential and commercial plumbing. Whether you're protecting a garden irrigation line, a pool circulation loop, or a domestic water supply, a reliable PVC check valve is the first line of defence. These one-way non-return valves are designed for DIYers, plumbers, and facilities managers who need a straightforward, solvent-weld solution that holds under pressure.\u003c\/p\u003e\n    \u003cp\u003eAvailable in 25 mm (~1 in), 32 mm (~1¼ in), and 40 mm (~1½ in) socket sizes, each valve features a solvent-weld (adhesive) socket end for a permanent, leak-free joint to standard PVC pressure pipe. Two internal mechanisms are offered: a spring-loaded type for reliable closure against low back-pressure, and a piston type for higher-flow applications where a positive seal under greater differential pressure is required. Finish options include White and Gray to match your existing pipework.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include drip and sprinkler irrigation systems where pump-off backflow must be prevented, swimming pool and spa return lines, rainwater harvesting tanks, and domestic cold-water supply risers. The solvent-weld socket connection makes these PVC non-return valves compatible with standard Schedule 40 and Class D PVC pressure pipe across all listed sizes.\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    \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits standard PVC pressure pipe — 25 mm, 32 mm, and 40 mm OD. Solvent-weld (adhesive) socket connection. Not suitable for CPVC, ABS, or threaded fittings without an adapter.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003ch2\u003e✅ Key Features of These PVC Check Valves\u003c\/h2\u003e\n    \u003cul class=\"hdiy-list\"\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003eTrue One-Way Flow:\u003c\/strong\u003e Internal spring or piston mechanism closes immediately on flow reversal, preventing backflow and siphoning without manual intervention.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🧪\u003c\/span\u003e \u003cstrong\u003ePVC Construction:\u003c\/strong\u003e Full PVC body resists corrosion, chlorine, and most common water-treatment chemicals — suited for potable water, pool, and irrigation service.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e \u003cstrong\u003eSolvent-Weld Socket Ends:\u003c\/strong\u003e Standard adhesive socket connection bonds permanently to Schedule 40 \/ Class D PVC pipe using standard PVC cement — no threading, no compression fittings required.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eThree Size Options:\u003c\/strong\u003e 25 mm (~1 in), 32 mm (~1¼ in), and 40 mm (~1½ in) cover the most common residential and light-commercial pipe diameters in a single product listing.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003eSpring \u0026amp; Piston Variants:\u003c\/strong\u003e Choose spring type for low-pressure or low-flow lines; choose piston type for higher-flow circuits where a firmer positive seal is needed under greater back-pressure.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎨\u003c\/span\u003e \u003cstrong\u003eWhite \u0026amp; Gray Finish:\u003c\/strong\u003e Two colour options allow the valve to blend with existing pipework in both indoor plumbing and outdoor irrigation installations.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ch2\u003e📐 Technical Specifications — PVC Check Valve\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003ePVC (Polyvinyl Chloride)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eAvailable Sizes\u003c\/th\u003e\n\u003ctd\u003e25 mm (~1 in), 32 mm (~1¼ in), 40 mm (~1½ in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eConnection Type\u003c\/th\u003e\n\u003ctd\u003eSolvent-weld (adhesive) socket both ends\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eValve Mechanism\u003c\/th\u003e\n\u003ctd\u003eSpring type \/ Piston type (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eColour \/ Finish\u003c\/th\u003e\n\u003ctd\u003eWhite \/ Gray (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFlow Direction\u003c\/th\u003e\n\u003ctd\u003eOne-way (non-return)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCompatible Pipe Standard\u003c\/th\u003e\n\u003ctd\u003eSchedule 40 \/ Class D PVC pressure pipe\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eSuitable Media\u003c\/th\u003e\n\u003ctd\u003eCold water, irrigation water, pool water\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMax Working Pressure\u003c\/th\u003e\n\u003ctd\u003eSee variant options \/ Contact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eOperating Temperature\u003c\/th\u003e\n\u003ctd\u003eUp to typically 60 °C (140 °F) for PVC\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 \/ 2 \/ 3 \/ 4 \/ 5 Pcs (see 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 between the spring type and the piston type?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe spring type uses a coil spring to hold the disc closed and is well suited to low-flow or low-pressure lines such as drip irrigation and small domestic supply pipes. The piston type uses a weighted or guided piston for a more positive seal and is better for higher-flow circuits — for example, pool return lines or larger irrigation mains — where back-pressure is greater and a firmer closure is needed.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhich pipe sizes are compatible with these check valves?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese valves use solvent-weld (adhesive) socket ends and are designed to fit standard PVC pressure pipe in 25 mm (~1 in), 32 mm (~1¼ in), and 40 mm (~1½ in) outside diameters. They are compatible with Schedule 40 and Class D PVC pipe. They are not designed for CPVC, ABS, or threaded connections without a suitable adapter.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan these valves be used for drinking water (potable water) systems?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003ePVC is widely used in potable cold-water supply systems. However, suitability for drinking water depends on local plumbing codes and any applicable certifications required in your jurisdiction. If your project requires a certified fitting (e.g., NSF\/ANSI 61), please contact us to confirm before ordering.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these valves resistant to chlorine and pool chemicals?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. PVC has good resistance to chlorine and the concentrations of pool chemicals typically found in residential swimming pools and spas. This makes these non-return valves a practical choice for pool circulation and return lines. Avoid exposure to solvents or chemicals outside the normal range of pool treatment products.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I install a solvent-weld PVC check valve?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eCut the pipe square and deburr the end. Dry-fit the valve to confirm alignment and mark the orientation — check valves are directional, so ensure the flow arrow on the body points in the direction of intended flow. Apply PVC primer to both the pipe end and the socket, then apply PVC cement to both surfaces. Push the pipe firmly into the socket with a slight twist and hold for 30 seconds. Allow the joint to cure fully before pressurising the line (typically 15–30 minutes for initial handling strength, 24 hours for full pressure).\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the maximum temperature these PVC valves can handle?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eStandard PVC is rated for cold-water service and is typically suitable up to around 60 °C (140 °F), though working pressure ratings decrease as temperature rises. These valves are not intended for hot-water supply lines. For hot-water applications, a CPVC or other high-temperature fitting would be required.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I order multiple pieces, and is there a volume discount?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes — each listing offers quantity options of 1, 2, 3, 4, or 5 pieces per order, with the per-unit price decreasing as quantity increases. Select your preferred quantity from the QTY(Pcs) option before adding to cart. For larger project quantities beyond 5 pieces, please contact us directly to discuss bulk pricing.\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 size, type, 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 between the spring type and the piston type?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The spring type uses a coil spring to hold the disc closed and is well suited to low-flow or low-pressure lines such as drip irrigation and small domestic supply pipes. The piston type uses a weighted or guided piston for a more positive seal and is better for higher-flow circuits where back-pressure is greater.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which pipe sizes are compatible with these check valves?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These valves use solvent-weld socket ends and fit standard PVC pressure pipe in 25 mm, 32 mm, and 40 mm outside diameters, compatible with Schedule 40 and Class D PVC pipe.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can these valves be used for drinking water (potable water) systems?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"PVC is widely used in potable cold-water supply systems. Suitability depends on local plumbing codes and certifications required in your jurisdiction. 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PVC has good resistance to chlorine and typical pool chemical concentrations, making these non-return valves suitable for pool circulation and return lines.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I install a solvent-weld PVC check valve?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Cut the pipe square, deburr, dry-fit to confirm flow direction, apply PVC primer then cement to both surfaces, push pipe into socket with a slight twist, hold 30 seconds, and allow 24 hours full cure before pressurising.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the maximum temperature these PVC valves can handle?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Standard PVC is typically suitable up to around 60 °C (140 °F). These valves are not intended for hot-water supply lines. Pressure ratings decrease as temperature rises.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I order multiple pieces, and is there a volume discount?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes — quantity options of 1 to 5 pieces are available with decreasing per-unit price. For larger quantities beyond 5 pieces, contact us directly to discuss bulk pricing.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"25 mm \u0026 White \/ Spring type \/ 1 Pcs","offer_id":52331762712850,"sku":"FAS020514x1","price":11.74,"currency_code":"USD","in_stock":true},{"title":"25 mm \u0026 White \/ Spring type \/ 2 Pcs","offer_id":52331762745618,"sku":"FAS020514x2","price":22.34,"currency_code":"USD","in_stock":true},{"title":"25 mm \u0026 White \/ Spring type \/ 3 Pcs","offer_id":52331762778386,"sku":"FAS020514x3","price":32.97,"currency_code":"USD","in_stock":true},{"title":"25 mm \u0026 White \/ Spring type \/ 4 Pcs","offer_id":52331762811154,"sku":"FAS020514x4","price":43.59,"currency_code":"USD","in_stock":true},{"title":"25 mm \u0026 White \/ Spring type \/ 5 Pcs","offer_id":52331762843922,"sku":"FAS020514x5","price":54.2,"currency_code":"USD","in_stock":true},{"title":"32 mm \u0026 White \/ Spring type \/ 1 Pcs","offer_id":52331762876690,"sku":"FAS020515x1","price":16.2,"currency_code":"USD","in_stock":true},{"title":"32 mm \u0026 White \/ Spring type \/ 2 Pcs","offer_id":52331762909458,"sku":"FAS020515x2","price":31.28,"currency_code":"USD","in_stock":true},{"title":"32 mm \u0026 White \/ Spring type \/ 3 Pcs","offer_id":52331762942226,"sku":"FAS020515x3","price":46.36,"currency_code":"USD","in_stock":true},{"title":"32 mm \u0026 White \/ Spring type \/ 4 Pcs","offer_id":52331762974994,"sku":"FAS020515x4","price":61.44,"currency_code":"USD","in_stock":true},{"title":"32 mm \u0026 White \/ Spring type \/ 5 Pcs","offer_id":52331763007762,"sku":"FAS020515x5","price":76.51,"currency_code":"USD","in_stock":true},{"title":"32 mm \u0026 Gray \/ Spring type \/ 1 Pcs","offer_id":52331763040530,"sku":"FAS020522x1","price":14.44,"currency_code":"USD","in_stock":true},{"title":"32 mm \u0026 Gray \/ Spring type \/ 2 Pcs","offer_id":52331763073298,"sku":"FAS020522x2","price":27.77,"currency_code":"USD","in_stock":true},{"title":"32 mm \u0026 Gray \/ Spring type \/ 3 Pcs","offer_id":52331763106066,"sku":"FAS020522x3","price":41.1,"currency_code":"USD","in_stock":true},{"title":"32 mm \u0026 Gray \/ Spring type \/ 4 Pcs","offer_id":52331763138834,"sku":"FAS020522x4","price":54.43,"currency_code":"USD","in_stock":true},{"title":"32 mm \u0026 Gray \/ Spring type \/ 5 Pcs","offer_id":52331763171602,"sku":"FAS020522x5","price":67.76,"currency_code":"USD","in_stock":true},{"title":"40 mm \u0026 Gray \/ Piston type \/ 1 Pcs","offer_id":52331763204370,"sku":"FAS020523x1","price":31.35,"currency_code":"USD","in_stock":true},{"title":"40 mm \u0026 Gray \/ Piston type \/ 2 Pcs","offer_id":52331763237138,"sku":"FAS020523x2","price":61.58,"currency_code":"USD","in_stock":true},{"title":"40 mm \u0026 Gray \/ Piston type \/ 3 Pcs","offer_id":52331763269906,"sku":"FAS020523x3","price":91.83,"currency_code":"USD","in_stock":true},{"title":"40 mm \u0026 Gray \/ Piston type \/ 4 Pcs","offer_id":52331763302674,"sku":"FAS020523x4","price":122.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of9_3ba9128e-a156-4030-a942-667046ad6173.jpg?v=1781961530","url":"https:\/\/homediyer.com\/products\/pvc-check-valve-25-40mm-one-way-non-return-valve-water-adhesive-pipe-fittings","provider":"HomeDIYer","version":"1.0","type":"link"}