{"product_id":"pvc-bottom-check-valve-non-return-valve-solvent-weld-id-20-75mm","title":"PVC Bottom Check Valve Pipe Fittings Non-Return Valve Solvent Weld ID 20-75mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003ePVC Bottom Check Valve — Reliable Backflow Prevention for Pipe Systems\u003c\/h2\u003e\n\u003cp\u003eWhen a pump shuts off unexpectedly or system pressure drops, uncontrolled backflow can damage equipment, contaminate water supplies, and cause costly repairs. Builders, plumbers, and DIY enthusiasts working on water supply, irrigation, or drainage systems need a dependable one-way valve that holds tight every time. The PVC bottom check valve with solvent weld connection is engineered to stop reverse flow automatically, protecting your pipework without requiring manual intervention.\u003c\/p\u003e\n\u003cp\u003eThis non-return valve is constructed from rigid PVC (polyvinyl chloride), offering a lightweight yet structurally sound body that resists common chemicals and corrosion. The solvent weld (socket) ends create a permanent, leak-free bond with standard PVC pipe. Available in seven inner diameter sizes ranging from 20mm to 75mm (approximately 3\/4 in to 3 in), corresponding to nominal pipe sizes DN15 through DN65, making it compatible with a broad range of residential and light commercial piping systems.\u003c\/p\u003e\n\u003cp\u003eTypical applications include submersible pump discharge lines where backflow prevention is critical, garden and agricultural drip irrigation systems requiring one-way flow control, rainwater harvesting tank inlets to prevent siphoning, and gravity-fed drainage runs where reverse flow must be blocked. Whether you are installing a new pump system or retrofitting an existing pipeline, this solvent weld check valve delivers consistent, tool-free operation once bonded in place.\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 Designed for standard Schedule 40 \/ Class D PVC pipe. Solvent weld (socket) connection — use PVC primer and cement for a permanent bond. Suitable for cold water, irrigation fluids, and mild chemical solutions within PVC service ratings. Not recommended for hot water lines above 60 °C (140 °F) or compressed air applications.\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These PVC Bottom 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 One-Way Flow Control\u003c\/strong\u003e\u003cbr\u003eThe spring-assisted or gravity-seated disc opens under forward flow pressure and closes instantly when flow stops or reverses, preventing backflow without any manual operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🧪\u003c\/span\u003e\u003cstrong\u003eCorrosion-Resistant PVC Body\u003c\/strong\u003e\u003cbr\u003eFull PVC construction resists rust, scale, and a wide range of mild chemicals, making it suitable for water supply, irrigation, and light-duty chemical transfer lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e\u003cstrong\u003eSolvent Weld Socket Ends\u003c\/strong\u003e\u003cbr\u003eBoth inlet and outlet feature standard socket (spigot) ends for a permanent, pressure-tight solvent cement bond — no threading, no clamps, no leaks at the joint.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eWide Size Range: ID 20–75mm (DN15–DN65)\u003c\/strong\u003e\u003cbr\u003eSeven sizes cover the most common residential and light commercial pipe diameters, from 20mm (≈3\/4 in) up to 75mm (≈3 in), so you can match your existing pipework exactly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e\u003cstrong\u003eLightweight and Easy to Handle\u003c\/strong\u003e\u003cbr\u003ePVC construction keeps the valve significantly lighter than brass or cast-iron alternatives, simplifying installation in tight spaces, overhead runs, or vertical pump discharge lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e💧\u003c\/span\u003e\u003cstrong\u003eLow Cracking Pressure for Smooth Flow\u003c\/strong\u003e\u003cbr\u003eThe valve is designed to open at low differential pressure, minimising flow restriction and pressure drop across the fitting — important for pump efficiency and system performance.\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\u003eConnection Type\u003c\/th\u003e\n\u003ctd\u003eSolvent Weld (Socket \/ Spigot)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInner Diameter Range\u003c\/th\u003e\n\u003ctd\u003e20mm – 75mm (approx. 3\/4 in – 3 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNominal Pipe Size Range\u003c\/th\u003e\n\u003ctd\u003eDN15 – DN65\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Sizes\u003c\/th\u003e\n\u003ctd\u003e20mm (DN15), 25mm (DN20), 32mm (DN25), 40mm (DN32), 50mm (DN40), 63mm (DN50), 75mm (DN65)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eValve Type\u003c\/th\u003e\n\u003ctd\u003eNon-Return \/ Check Valve (Bottom \/ Foot type)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax Working Temperature\u003c\/th\u003e\n\u003ctd\u003eUp to 60 °C (140 °F)\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\u003eBody Color\u003c\/th\u003e\n\u003ctd\u003eWhite \/ Light Grey (standard PVC)\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 pipe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\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\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right size PVC check valve for my pipe?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMatch the valve's inner diameter (ID) to your existing pipe's inner diameter or nominal size. For example, if you have DN20 pipe (25mm ID), select the 25mm (DN20) variant. When in doubt, measure the outer diameter of your pipe and subtract the wall thickness, or check the pipe's printed markings for its nominal size designation.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\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 is a bottom\/foot-style check valve, which is primarily designed for vertical installation at the base of a suction line or pump inlet. It can also be installed horizontally in many configurations, but always ensure the arrow or flow direction marking on the body aligns with the intended flow direction. Consult the product markings before bonding in place.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\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 standard PVC solvent cement (PVC glue) along with a PVC primer\/cleaner for a code-compliant, pressure-tight bond. Apply primer to both the pipe spigot and the valve socket, then apply cement and push firmly together with a slight twist. Allow the joint to cure fully before pressurising the system — typically 15–30 minutes for handling and 24 hours for full pressure service.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this valve suitable for drinking water (potable water) systems?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003ePVC is widely used in potable water distribution. However, suitability for drinking water depends on the specific grade of PVC and any applicable local certifications (such as NSF\/ANSI 61). If your application requires certified potable water compliance, please contact us to confirm the certification status of the specific variant before purchasing.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow does a bottom check valve prevent backflow?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe valve contains an internal disc or flap held against a seat by a spring or gravity. When forward flow pressure exceeds the cracking pressure, the disc lifts and allows fluid to pass. When the pump stops or pressure drops, the disc returns to its seat under spring force or gravity, creating a seal that blocks reverse flow immediately.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this valve for irrigation or garden water systems?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. PVC check valves are commonly used in drip irrigation, sprinkler systems, and garden water supply lines to prevent siphoning and maintain system pressure when the pump is off. Select the size that matches your irrigation mainline diameter for a direct, leak-free fit.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between a check valve and a gate valve?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eA check valve (non-return valve) operates automatically — it opens with forward flow and closes to block reverse flow, requiring no manual action. A gate valve is a manually operated shut-off valve that you open or close by turning a handle. For backflow prevention, a check valve is the correct choice; gate valves are used for isolation, not flow direction control.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-cta\"\u003e\n🛒 Select your size (Inner Diameter) 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 right size PVC check valve for my pipe?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Match the valve's inner diameter (ID) to your existing pipe's inner diameter or nominal size. For example, if you have DN20 pipe (25mm ID), select the 25mm (DN20) variant. When in doubt, measure the outer diameter of your pipe and subtract the wall thickness, or check the pipe's printed markings for its nominal size designation.\"\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 is a bottom\/foot-style check valve, primarily designed for vertical installation at the base of a suction line or pump inlet. It can also be installed horizontally in many configurations, but always ensure the arrow or flow direction marking on the body aligns with the intended flow direction.\"\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 standard PVC solvent cement along with a PVC primer\/cleaner. Apply primer to both the pipe spigot and the valve socket, then apply cement and push firmly together with a slight twist. Allow 15–30 minutes for handling and 24 hours for full pressure service.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this valve suitable for drinking water (potable water) systems?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"PVC is widely used in potable water distribution. Suitability for drinking water depends on the specific grade of PVC and local certifications (such as NSF\/ANSI 61). Contact us to confirm certification status before purchasing for potable water applications.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How does a bottom check valve prevent backflow?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The valve contains an internal disc held against a seat by a spring or gravity. When forward flow pressure exceeds the cracking pressure, the disc lifts and allows fluid to pass. When the pump stops, the disc returns to its seat, blocking reverse flow immediately.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use this valve for irrigation or garden water systems?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. PVC check valves are commonly used in drip irrigation, sprinkler systems, and garden water supply lines to prevent siphoning and maintain system pressure when the pump is off. Select the size that matches your irrigation mainline diameter.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between a check valve and a gate valve?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A check valve operates automatically — it opens with forward flow and closes to block reverse flow. A gate valve is manually operated for isolation. For backflow prevention, a check valve is the correct choice.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"20mm（DN15）","offer_id":52332165234962,"sku":"GLFBNHHBSGD00400x1","price":12.44,"currency_code":"USD","in_stock":true},{"title":"25mm（DN20）","offer_id":52332165267730,"sku":"GLFBNHHBSGD00399x1","price":14.89,"currency_code":"USD","in_stock":true},{"title":"32mm（DN25）","offer_id":52332165300498,"sku":"GLFBNHHBSGD00405x1","price":23.11,"currency_code":"USD","in_stock":true},{"title":"40mm（DN32）","offer_id":52332165333266,"sku":"GLFBNHHBSGD00404x1","price":34.39,"currency_code":"USD","in_stock":true},{"title":"50mm（DN40）","offer_id":52332165366034,"sku":"GLFBNHHBSGD00403x1","price":41.0,"currency_code":"USD","in_stock":true},{"title":"63mm（DN50）","offer_id":52332165398802,"sku":"GLFBNHHBSGD00402x1","price":60.78,"currency_code":"USD","in_stock":true},{"title":"75mm（DN65）","offer_id":52332165431570,"sku":"GLFBNHHBSGD00397x1","price":123.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of7_c1d3279f-de95-4363-bf37-ec0417583fdc.jpg?v=1782192961","url":"https:\/\/homediyer.com\/products\/pvc-bottom-check-valve-non-return-valve-solvent-weld-id-20-75mm","provider":"HomeDIYer","version":"1.0","type":"link"}