{"product_id":"white-pvc-ball-valve-double-union-solvent-weld-pipe-fittings-pond-tank-20-110mm","title":"White PVC Ball Valve Double Union Solvent Weld Pipe Fittings Pond Tank 20-110mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eWhite PVC Ball Valve Double Union — Reliable Flow Control for Pond, Tank \u0026amp; Pool Plumbing\u003c\/h2\u003e\n\u003cp\u003eWhen a leaking or seized inline valve forces you to drain an entire pond or tank just to make a repair, the real problem is the fitting — not the job. Pond builders, aquaculture operators, and DIY plumbers who manage pressurised water systems need a valve they can isolate and remove without cutting pipe. This double union PVC ball valve is built for exactly that scenario.\u003c\/p\u003e\n\u003cp\u003eEach valve is constructed from rigid white PVC (uPVC) with solvent weld socket ends and a true double union body. The union nuts on both sides allow the valve to be unscrewed and lifted out of the line without disturbing adjacent pipework. Available in nine inner diameter sizes from 20mm (approx. ¾\") to 110mm (approx. 4¼\"), with wall dimensions conforming to standard metric pipe schedules.\u003c\/p\u003e\n\u003cp\u003eTypical applications include koi pond filtration loops, rainwater harvesting tank outlets, irrigation manifolds, aquaponics recirculating systems, and swimming pool plant room pipework — anywhere a solvent weld ball valve with double union isolation is required.\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 metric uPVC pressure pipe. Solvent weld (socket) ends accept pipe conforming to BS EN ISO 1452 \/ DIN 8061 outside diameters. Not suitable for imperial or CPVC pipe without an adapter.\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These PVC Double Union Ball Valves\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔵\u003c\/span\u003e\n\u003cstrong\u003eTrue Double Union Design\u003c\/strong\u003e\n\u003cp\u003eUnion nuts on both inlet and outlet sides allow the valve body to be removed from the pipeline without cutting — ideal for maintenance, winterisation, or replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔵\u003c\/span\u003e\n\u003cstrong\u003eFull-Bore Ball Port\u003c\/strong\u003e\n\u003cp\u003eThe ball bore matches the pipe inner diameter, minimising flow restriction and pressure drop across the valve — critical for pump-fed pond and pool circuits.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔵\u003c\/span\u003e\n\u003cstrong\u003eSolvent Weld Socket Ends\u003c\/strong\u003e\n\u003cp\u003eStandard solvent cement (PVC primer + cement) bonding creates a permanent, leak-free joint rated for continuous water service. Compatible with metric uPVC pipe.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔵\u003c\/span\u003e\n\u003cstrong\u003eCorrosion-Free uPVC Body\u003c\/strong\u003e\n\u003cp\u003eRigid PVC resists chlorine, mild acids, algaecides, and common pond treatments — no rust, no scale build-up, no degradation from prolonged water contact.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔵\u003c\/span\u003e\n\u003cstrong\u003eNine Size Options (20–110mm ID)\u003c\/strong\u003e\n\u003cp\u003eCovers the most common metric pipe sizes used in residential and light commercial water systems, from 20mm (¾\") up to 110mm (approx. 4¼\") inner diameter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔵\u003c\/span\u003e\n\u003cstrong\u003eQuarter-Turn Operation\u003c\/strong\u003e\n\u003cp\u003eA 90° lever handle provides fast, positive open\/close action with a clear visual indicator of valve position — no tools required during normal operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — PVC Double Union Ball Valve\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eRigid uPVC (unplasticised PVC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColour\u003c\/th\u003e\n\u003ctd\u003eWhite\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\u003eValve Type\u003c\/th\u003e\n\u003ctd\u003eFull-bore ball valve, double union body\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSize Range (Inner Diameter)\u003c\/th\u003e\n\u003ctd\u003e20mm \/ 25mm \/ 32mm \/ 40mm \/ 50mm \/ 63mm \/ 75mm \/ 90mm \/ 110mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApproximate Imperial Equivalents\u003c\/th\u003e\n\u003ctd\u003e¾\" \/ 1\" \/ 1¼\" \/ 1½\" \/ 2\" \/ 2½\" \/ 3\" \/ 3½\" \/ 4¼\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePipe Standard Compatibility\u003c\/th\u003e\n\u003ctd\u003eMetric uPVC pressure pipe (BS EN ISO 1452 \/ DIN 8061)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperation\u003c\/th\u003e\n\u003ctd\u003eQuarter-turn lever handle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTypical Working Pressure\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTemperature Range\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 valve (single unit)\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\u003eWhich size should I choose for my pond pump pipework?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMatch the inner diameter of the valve to the outer diameter of your existing uPVC pipe. For example, if your pipe is 32mm OD metric uPVC, select the 32mm variant. If you are unsure, measure the outside of your pipe and cross-reference with standard metric pipe tables, or contact us to confirm before ordering.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this valve with CPVC or imperial-sized pipe?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese valves are sized for metric uPVC pipe conforming to BS EN ISO 1452 \/ DIN 8061 outside diameters. CPVC and imperial pipe have different OD dimensions and will not bond correctly with a solvent weld socket sized for metric pipe. Reducer bushes or adapters would be required — contact us to confirm compatibility for your specific pipe.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong is a solvent weld joint — will it hold under pressure?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eWhen prepared and bonded correctly with a compatible PVC primer and solvent cement, a solvent weld joint chemically fuses the pipe and socket into a single piece. The joint typically exceeds the burst strength of the pipe wall itself. Allow the manufacturer's recommended cure time before pressurising — usually 24 hours at ambient temperature for full strength.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this valve resistant to pond treatments and chlorine?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eRigid uPVC has good resistance to chlorine at typical water treatment concentrations, common algaecides, and most pond additives used in koi and ornamental fish keeping. It is not recommended for concentrated acids, ketones, or aromatic solvents. For aggressive chemical dosing applications, contact us to confirm suitability.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the advantage of a double union over a standard ball valve?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eA standard solvent weld ball valve is permanently bonded into the pipeline — if it fails or needs servicing, you must cut it out and re-cement new fittings. A double union valve has threaded union nuts on both sides, so you can unscrew the valve body and lift it out of the line in minutes, then reinstall or replace it without any pipe cutting or solvent cement work.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan this valve be installed in any orientation?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003ePVC ball valves of this type are generally suitable for horizontal, vertical, and angled installation. Ensure the lever handle has sufficient clearance to rotate 90° fully in the chosen orientation. For vertical installations with the handle pointing downward, confirm the union nuts are fully tightened to prevent any weeping at the union seals.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes the valve come with union seals \/ O-rings included?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes — the union nuts and EPDM or PTFE seals required to assemble the double union connections are included with the valve as supplied. No additional seals are needed for initial installation.\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\": \"Which size should I choose for my pond pump pipework?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Match the inner diameter of the valve to the outer diameter of your existing uPVC pipe. If you are unsure, measure the outside of your pipe and cross-reference with standard metric pipe tables, or contact us to confirm before ordering.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use this valve with CPVC or imperial-sized pipe?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These valves are sized for metric uPVC pipe conforming to BS EN ISO 1452 \/ DIN 8061 outside diameters. CPVC and imperial pipe have different OD dimensions and will not bond correctly with a metric solvent weld socket. Reducer bushes or adapters would be required.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How strong is a solvent weld joint — will it hold under pressure?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"When prepared and bonded correctly with a compatible PVC primer and solvent cement, a solvent weld joint chemically fuses the pipe and socket into a single piece, typically exceeding the burst strength of the pipe wall itself. Allow 24 hours cure time before pressurising.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this valve resistant to pond treatments and chlorine?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Rigid uPVC has good resistance to chlorine at typical water treatment concentrations, common algaecides, and most pond additives used in koi and ornamental fish keeping. It is not recommended for concentrated acids, ketones, or aromatic solvents.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the advantage of a double union over a standard ball valve?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A double union valve has threaded union nuts on both sides, so you can unscrew the valve body and lift it out of the line in minutes without any pipe cutting or solvent cement work — unlike a standard solvent weld valve which must be cut out if it fails.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can this valve be installed in any orientation?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"PVC ball valves of this type are generally suitable for horizontal, vertical, and angled installation. Ensure the lever handle has sufficient clearance to rotate 90° fully in the chosen orientation.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does the valve come with union seals \/ O-rings included?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes — the union nuts and EPDM or PTFE seals required to assemble the double union connections are included with the valve as supplied. No additional seals are needed for initial installation.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"20mm","offer_id":52331902894354,"sku":"GLFBNHHGLBZSJ020485x1","price":6.11,"currency_code":"USD","in_stock":true},{"title":"25mm","offer_id":52331902927122,"sku":"GLFBNHHGLBZSJ020486x1","price":8.36,"currency_code":"USD","in_stock":true},{"title":"32mm","offer_id":52331902959890,"sku":"GLFBNHHGLBZSJ020487x1","price":12.77,"currency_code":"USD","in_stock":true},{"title":"40mm","offer_id":52331902992658,"sku":"GLFBNHHGLBZSJ020488x1","price":17.34,"currency_code":"USD","in_stock":true},{"title":"50mm","offer_id":52331903025426,"sku":"GLFBNHHGLBZSJ020489x1","price":31.95,"currency_code":"USD","in_stock":true},{"title":"63mm","offer_id":52331903058194,"sku":"GLFBNHHGLBZSJ020490x1","price":40.79,"currency_code":"USD","in_stock":true},{"title":"75mm","offer_id":52331903090962,"sku":"GLFBNHHGLBZSJ020491x1","price":80.23,"currency_code":"USD","in_stock":true},{"title":"90mm","offer_id":52331903123730,"sku":"GLFBNHHGLBZSJ020492x1","price":123.83,"currency_code":"USD","in_stock":true},{"title":"110mm","offer_id":52331903156498,"sku":"GLFBNHHGLBZSJ020493x1","price":180.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of13_9ed948af-31b1-4383-9eb4-534476c5e8c2.jpg?v=1782097048","url":"https:\/\/homediyer.com\/products\/white-pvc-ball-valve-double-union-solvent-weld-pipe-fittings-pond-tank-20-110mm","provider":"HomeDIYer","version":"1.0","type":"link"}