{"product_id":"pvc-straight-pipe-coupling-socket-slip-joint-fitting","title":"PVC Straight Pipe Coupling — Socket Slip Joint Fitting, ID 20mm–110mm","description":"\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 inner diameter size?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Match the coupling's inner diameter (ID) to the outer diameter (OD) of your pipe. For Schedule 40 PVC, a 20mm ID coupling typically fits a 20mm OD pipe. When in doubt, measure your existing pipe's outer diameter and select the corresponding coupling size. Available sizes range from 20mm (≈3\/4\\u201d) to 110mm (≈4-3\/8\\u201d).\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What pressure rating do these PVC couplings carry?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"PVC straight socket couplings of this type are generally rated for working pressures up to 150–200 PSI at room temperature, depending on pipe schedule and installation quality. Pressure capacity decreases as temperature rises. Contact us to confirm the rating for your specific size.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can these fittings be used outdoors or underground?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"PVC is inherently resistant to corrosion and moisture, making it suitable for underground and sheltered outdoor installations. For direct UV exposure, painting or wrapping the fitting is recommended, as prolonged sunlight can cause surface degradation over time.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What thread or connection standard do these couplings use?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These are solvent-weld (slip) socket fittings — they do not use threads. They are designed to be bonded to plain-end PVC pipe using PVC primer and solvent cement, following standard DIN or metric PVC pipe dimensions.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these compatible with CPVC or ABS pipe?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These couplings are designed for standard PVC pipe. While the socket dimensions may physically fit CPVC or ABS pipe in some sizes, chemical compatibility of the solvent cement must be verified. Using PVC fittings with CPVC or ABS pipe is generally not recommended without confirming compatibility.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I know if I need a coupling or a union?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A straight coupling (like this one) is a permanent solvent-welded connection — ideal for extending a run of pipe or repairing a section. A union allows the joint to be disassembled later without cutting. If future serviceability is needed, choose a union; for permanent joins, this coupling is the right choice.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the wall thickness of these fittings?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Wall thickness varies by size. These fittings are generally manufactured to meet standard Schedule 40 socket dimensions. For exact wall thickness by size, please contact us to confirm.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003c!-- ① OVERVIEW --\u003e\n  \u003ch2\u003ePVC Straight Pipe Coupling — Reliable Slip Socket Joint for Water Lines\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003cp\u003eWhether you're extending a water supply line, repairing a cracked irrigation run, or roughing in a drain system, finding a coupling that bonds cleanly and holds pressure without leaking is non-negotiable. Plumbers, irrigation contractors, and serious DIYers all need a straight socket coupling they can trust to go in once and stay put.\u003c\/p\u003e\n    \u003cp\u003eEach piece is a PVC direct pipe fitting — a straight socket coupling (also called a slip joint or socket union) made from rigid PVC material. The socket ends accept plain-end PVC pipe via solvent-weld (slip fit) connection. Available in nine inner diameter sizes: 20mm (≈3\/4\"), 25mm (≈1\"), 32mm (≈1-1\/4\"), 40mm (≈1-1\/2\"), 50mm (≈2\"), 63mm (≈2-1\/2\"), 75mm (≈3\"), 90mm (≈3-1\/2\"), and 110mm (≈4-3\/8\"). Sold individually — select the quantity you need.\u003c\/p\u003e\n    \u003cp\u003eTypical applications include residential and commercial cold water supply lines, drip and sprinkler irrigation systems, pool and spa plumbing repairs, and schedule 40 PVC drain-waste-vent (DWV) rough-in work where a straight inline coupling is needed to join or extend pipe runs.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ② COMPATIBILITY BAR --\u003e\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 PVC pipe (DIN\/ISO dimensions). Solvent-weld (slip) socket connection — requires PVC primer and solvent cement (sold separately). Not pre-threaded. Verify pipe OD matches selected coupling ID before ordering.\n  \u003c\/div\u003e\n\n  \u003c!-- ③ KEY FEATURES --\u003e\n  \u003ch2\u003e✅ Key Features of These PVC Straight Socket Couplings\u003c\/h2\u003e\n  \u003cul class=\"hdiy-features\"\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔗\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eInline Slip Socket Design\u003c\/strong\u003e — Both ends accept plain-end PVC pipe for a solvent-weld straight coupling connection, creating a smooth, unobstructed bore with no flow restriction.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eNine Size Options (ID 20–110mm)\u003c\/strong\u003e — Covers the most common metric PVC pipe sizes used in residential irrigation, water supply, and drain lines, so you can match your existing pipe without adapters.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🧪\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eRigid PVC Construction\u003c\/strong\u003e — PVC material is naturally resistant to corrosion, scale buildup, and chemical attack from common water treatment additives, making it a dependable choice for long-term buried or concealed installations.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e💧\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eSmooth Interior Bore\u003c\/strong\u003e — The straight-through socket profile maintains consistent pipe ID, minimizing turbulence and pressure drop across the joint — important in irrigation systems where flow uniformity matters.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏗️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eCompact Coupling Body\u003c\/strong\u003e — The short, straight coupling body fits into tight spaces in wall cavities, trenches, and manifold assemblies where a longer fitting would be impractical.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eStandard Solvent-Weld Assembly\u003c\/strong\u003e — Bonds with any standard PVC primer and cement following ASTM D2564 procedures — no special tools required, and the joint typically reaches handling strength within minutes.\u003c\/span\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003c!-- ④ TECHNICAL SPECIFICATIONS --\u003e\n  \u003ch2\u003e📐 Technical Specifications — PVC Straight Socket Coupling\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eFitting Type\u003c\/th\u003e\n\u003ctd\u003eStraight Socket Coupling (Slip × Slip)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eRigid PVC (Polyvinyl Chloride)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eConnection Method\u003c\/th\u003e\n\u003ctd\u003eSolvent-weld (slip fit) — both ends\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eAvailable Inner Diameters\u003c\/th\u003e\n\u003ctd\u003e20mm (≈3\/4\") \/ 25mm (≈1\") \/ 32mm (≈1-1\/4\") \/ 40mm (≈1-1\/2\") \/ 50mm (≈2\") \/ 63mm (≈2-1\/2\") \/ 75mm (≈3\") \/ 90mm (≈3-1\/2\") \/ 110mm (≈4-3\/8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePipe Standard Compatibility\u003c\/th\u003e\n\u003ctd\u003eMetric PVC pipe (DIN\/ISO); verify OD before ordering\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePressure Rating\u003c\/th\u003e\n\u003ctd\u003eSee variant options — contact us to confirm by size\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eWall Thickness\u003c\/th\u003e\n\u003ctd\u003eSee variant options — contact us to confirm by size\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eWhite \/ Light Gray (typical for PVC)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTemperature Range\u003c\/th\u003e\n\u003ctd\u003eGenerally suitable for cold water service (up to ~60°C \/ 140°F); not rated for hot water\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eSold As\u003c\/th\u003e\n\u003ctd\u003e1 piece per order (select quantity at checkout)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eWater supply, irrigation, pool\/spa plumbing, DWV drain lines\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-note\"\u003e\n    \u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e\n    \u003cstrong\u003eNote:\u003c\/strong\u003e These are metric-dimension PVC fittings. If your existing pipe is imperial Schedule 40 (IPS), please measure the pipe's outer diameter and compare to the coupling ID before ordering. When in doubt, contact us to confirm fit.\n  \u003c\/div\u003e\n\n  \u003c!-- ⑤ FAQ --\u003e\n  \u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-faq\"\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I choose the right inner diameter size?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eMatch the coupling's inner diameter (ID) to the outer diameter (OD) of your pipe. For standard metric PVC, the pipe OD and coupling ID are typically the same nominal size. For example, a 25mm ID coupling generally fits a 25mm OD pipe. Available sizes range from 20mm (≈3\/4\") to 110mm (≈4-3\/8\"). If you're unsure, measure your existing pipe's outer diameter with calipers and select accordingly.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat pressure can these PVC couplings handle?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003ePVC straight socket couplings of this type are generally rated for working pressures up to 150–200 PSI at room temperature when properly solvent-welded, though the exact rating depends on pipe schedule, size, and installation quality. Pressure capacity decreases as water temperature rises. Contact us to confirm the pressure rating for your specific size before use in high-pressure applications.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I use these fittings outdoors or underground?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eYes — PVC is inherently resistant to corrosion, moisture, and most soil chemicals, making it well-suited for underground burial and sheltered outdoor plumbing. For installations with direct, prolonged UV exposure (such as above-ground irrigation lines in full sun), painting the fitting with a UV-resistant paint or wrapping it is recommended to prevent surface brittleness over time.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat connection standard do these couplings use — are they threaded?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eNo — these are solvent-weld (slip) socket fittings, not threaded. Each end has a smooth socket that accepts the plain end of a PVC pipe. The joint is made permanent by applying PVC primer followed by solvent cement, which chemically fuses the pipe and fitting into a single piece. No wrenches or thread tape are needed.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these compatible with CPVC or ABS pipe?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThese couplings are designed for standard PVC pipe. While the socket dimensions may physically accommodate CPVC or ABS pipe in some sizes, the solvent cement chemistry differs between materials. Using PVC fittings with CPVC or ABS pipe is generally not recommended without verifying chemical compatibility of the cement. For mixed-material connections, a transition fitting or mechanical coupling is typically the safer choice.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhen should I use a straight coupling versus a union fitting?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eA straight socket coupling (this product) creates a permanent, solvent-welded joint — ideal for extending a pipe run, repairing a cracked section, or joining two pipe ends where future disassembly is not needed. A union fitting, by contrast, allows the joint to be unscrewed and separated later without cutting the pipe. If you anticipate needing to service or remove the fitting in the future, choose a union; for permanent inline connections, this coupling is the right tool.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the wall thickness of these fittings?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eWall thickness varies by size and is typically consistent with Schedule 40 socket fitting dimensions for each nominal diameter. For exact wall thickness specifications by size, please contact us to confirm before ordering for applications with strict dimensional requirements.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n  \u003c!-- ⑥ CTA BAR --\u003e\n  \u003cdiv class=\"hdiy-cta\"\u003e\n    🛒 Select your inner diameter and quantity above, then add to cart — ships from our US warehouse.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"20mm \/ 1 Pcs","offer_id":52332811026706,"sku":"GLFBQLWGLBZSJ019419x1","price":1.84,"currency_code":"USD","in_stock":true},{"title":"25mm \/ 1 Pcs","offer_id":52332811059474,"sku":"GLFBQLWGLBZSJ019420x1","price":1.97,"currency_code":"USD","in_stock":true},{"title":"32mm \/ 1 Pcs","offer_id":52332811092242,"sku":"GLFBQLWGLBZSJ019421x1","price":2.52,"currency_code":"USD","in_stock":true},{"title":"40mm \/ 1 Pcs","offer_id":52332811125010,"sku":"GLFBQLWGLBZSJ019422x1","price":3.6,"currency_code":"USD","in_stock":true},{"title":"50mm \/ 1 Pcs","offer_id":52332811157778,"sku":"GLFBQLWGLBZSJ019423x1","price":5.7,"currency_code":"USD","in_stock":true},{"title":"63mm \/ 1 Pcs","offer_id":52332811190546,"sku":"GLFBQLWGLBZSJ019424x1","price":8.36,"currency_code":"USD","in_stock":true},{"title":"75mm \/ 1 Pcs","offer_id":52332811223314,"sku":"GLFBQLWGLBZSJ019425x1","price":12.77,"currency_code":"USD","in_stock":true},{"title":"90mm \/ 1 Pcs","offer_id":52332811256082,"sku":"GLFBQLWGLBZSJ019426x1","price":21.96,"currency_code":"USD","in_stock":true},{"title":"110mm \/ 1 Pcs","offer_id":52332811288850,"sku":"GLFBQLWGLBZSJ019427x1","price":33.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of7_36df42a2-79b4-4e7f-8191-4903a4568809.jpg?v=1780918210","url":"https:\/\/homediyer.com\/de\/products\/pvc-straight-pipe-coupling-socket-slip-joint-fitting","provider":"HomeDIYer","version":"1.0","type":"link"}