{"product_id":"straight-coupling-pvc-plumbing-fittings-solvent-weld-metric","title":"Straight Coupling PVC Plumbing Fittings Pipe Solvent Weld Metric Thickening","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eStraight Coupling PVC Pipe Fittings — Reliable Solvent Weld Joints for Metric Plumbing\u003c\/h2\u003e\n\u003cp\u003eWhen a leaking joint or a mid-run pipe extension threatens your plumbing project, you need a coupling that seats flush, bonds fast, and holds under pressure. These straight coupling PVC plumbing fittings are engineered for DIYers, plumbers, and irrigation installers who demand a clean, permanent solvent weld connection without the guesswork of mismatched sizing.\u003c\/p\u003e\n\u003cp\u003eEach fitting is manufactured from rigid uPVC (unplasticised polyvinyl chloride) with a thickened metric wall profile. Available in three metric bore sizes — 20mm (~¾ in), 25mm (~1 in), and 32mm (~1¼ in) — and two colour options (White and Red) for easy system colour-coding. Wall thickness is typically 2.0–3.0mm depending on diameter, and the socket depth is sized to provide a full solvent weld contact area on both ends.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include domestic cold-water supply line repairs, garden drip-irrigation manifold extensions, and workshop compressed-air PVC pipe runs where a straight inline coupling for metric PVC pipe is required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔗\u003c\/span\u003e Compatible with metric uPVC pressure pipe (Class B \/ Class C) in 20mm, 25mm, and 32mm OD. Requires standard PVC solvent cement — not included.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Straight Coupling PVC Pipe Fittings\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003eThickened Metric Wall\u003c\/strong\u003e\u003cp\u003eReinforced socket walls (typically 2.0–3.0mm) resist cracking under solvent weld stress and sustained line pressure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎨\u003c\/span\u003e\u003cstrong\u003eDual Colour Options\u003c\/strong\u003e\u003cp\u003eWhite and Red finishes allow colour-coded pipe routing — ideal for distinguishing supply lines, return lines, or irrigation zones at a glance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eThree Metric Bore Sizes\u003c\/strong\u003e\u003cp\u003e20mm, 25mm, and 32mm sockets match standard metric uPVC pipe OD, eliminating adapter rings and reducing leak points.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚗️\u003c\/span\u003e\u003cstrong\u003euPVC Material\u003c\/strong\u003e\u003cp\u003eRigid unplasticised PVC resists chlorine, mild acids, and UV degradation, making it suitable for both indoor and sheltered outdoor plumbing runs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eFull-Bore Straight-Through Flow\u003c\/strong\u003e\u003cp\u003eUnrestricted internal bore maintains flow rate — no step-down or restriction at the joint, critical for irrigation and supply applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cstrong\u003eFlexible Pack Quantities\u003c\/strong\u003e\u003cp\u003eAvailable from 1 pc to 100 pcs per order, so you can grab a single replacement or stock up for a full installation run.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — PVC Straight Coupling Fittings\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003euPVC (Unplasticised Polyvinyl Chloride)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConnection Type\u003c\/th\u003e\n\u003ctd\u003eSolvent Weld (Socket)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Sizes (Bore)\u003c\/th\u003e\n\u003ctd\u003e20mm \/ 25mm \/ 32mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWall Thickness\u003c\/th\u003e\n\u003ctd\u003eTypically 2.0–3.0mm (varies by size)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColour Options\u003c\/th\u003e\n\u003ctd\u003eWhite, Red\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStandard\u003c\/th\u003e\n\u003ctd\u003eMetric (BS EN ISO 1452 compatible profile)\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\u003eTemperature Range\u003c\/th\u003e\n\u003ctd\u003e0°C to 60°C (32°F to 140°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantities\u003c\/th\u003e\n\u003ctd\u003e1 \/ 2 \/ 3 \/ 4 \/ 10 \/ 20 \/ 50 \/ 100 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eSmooth socket interior for full solvent bond\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eWhich pipe sizes do these couplings fit?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese straight couplings are designed for metric uPVC pipe with outer diameters of 20mm, 25mm, and 32mm. Select the size that matches your existing pipe OD. If you are unsure, measure the outside diameter of your pipe before ordering.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDo I need a special adhesive to install these fittings?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. These fittings use a solvent weld (solvent cement) connection. You will need a compatible PVC solvent cement and, ideally, a PVC primer\/cleaner. Solvent cement is not included. Follow the cement manufacturer's cure time before pressurising the line.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eAre these fittings suitable for hot water or heating systems?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese uPVC couplings are rated for cold and warm water up to approximately 60°C (140°F). They are not recommended for hot water heating systems, steam lines, or applications that regularly exceed this temperature. For hot water, consider CPVC or brass fittings.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow strong is a solvent weld joint made with these couplings?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eA correctly made solvent weld joint is chemically fused and typically stronger than the pipe wall itself. The thickened socket walls on these metric couplings provide additional material for a full-depth bond. Allow the full cure time specified by your solvent cement before pressure testing.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I use these fittings for garden irrigation or outdoor plumbing?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. uPVC has good resistance to UV, chlorine, and mild chemicals, making it suitable for garden irrigation manifolds, outdoor cold-water supply lines, and sheltered outdoor plumbing runs. For fully exposed installations, consider wrapping or painting the pipe to extend UV life.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat is the difference between the White and Red colour options?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe fittings are functionally identical — the colour difference is purely for visual identification. Many installers use colour coding to distinguish supply from return lines, or to separate different irrigation zones. Choose the colour that matches your existing pipe or your colour-coding system.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow do I choose the right pack quantity?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eFor a single repair or splice, the 1 pc or 2 pcs option is ideal. For a full installation run with multiple joints, the 10, 20, or 50 pcs packs offer better per-unit value. The 100 pcs pack suits contractors or large irrigation projects where consistent sizing is needed throughout.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your colour, size, and quantity above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Which pipe sizes do these couplings fit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These straight couplings are designed for metric uPVC pipe with outer diameters of 20mm, 25mm, and 32mm. Select the size that matches your existing pipe OD.\"}},{\"@type\":\"Question\",\"name\":\"Do I need a special adhesive to install these fittings?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. These fittings use a solvent weld connection. 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Allow the full cure time specified by your solvent cement before pressure testing.\"}},{\"@type\":\"Question\",\"name\":\"Can I use these fittings for garden irrigation or outdoor plumbing?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. uPVC has good resistance to UV, chlorine, and mild chemicals, making it suitable for garden irrigation manifolds and outdoor cold-water supply lines.\"}},{\"@type\":\"Question\",\"name\":\"What is the difference between the White and Red colour options?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The fittings are functionally identical. The colour difference is for visual identification and colour-coding of pipe systems.\"}},{\"@type\":\"Question\",\"name\":\"How do I choose the right pack quantity?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"For a single repair, the 1 or 2 pcs option is ideal. For full installation runs, the 10, 20, or 50 pcs packs offer better per-unit value. 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