White PVC Straight Pipe Coupling Socket — Reliable Solvent-Weld Connector for ID 16mm to 200mm Pipes
When a leaking joint or a mismatched fitting derails a plumbing project, the fix starts with a coupling you can trust. Homeowners, irrigation installers, and trade plumbers working with PVC pressure or drainage lines need a straight connector that seats cleanly, bonds securely, and holds pressure without creep. These white PVC straight pipe coupling sockets are designed for exactly that job.
Each coupling is moulded from rigid PVC (polyvinyl chloride) with a smooth internal bore sized to match standard pipe inner diameters. Available in 14 sizes spanning ID 16mm (approx. ⅝ in) through 200mm (approx. 7⅞ in), the socket ends accept solvent-weld cement for a chemically fused, leak-free joint. Wall thickness scales with pipe size to maintain consistent pressure ratings across the range.
Typical applications include residential cold-water supply lines, garden and agricultural drip-irrigation manifolds, rainwater harvesting pipework, and low-pressure drainage runs. The white finish suits exposed installations where a clean appearance matters, such as under-sink repairs, greenhouse irrigation frames, and pool equipment plumbing.
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Compatibility: Fits standard PVC pipe to matching inner diameter (ID). Confirm your pipe's outer diameter before ordering — PVC pipe OD varies by schedule and standard (e.g., Schedule 40, DIN 8061/8062, AS/NZS 1477).
✅ Key Features of These White PVC Straight Pipe Coupling Sockets
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14 Sizes in One Listing
Inner diameters from 16mm to 200mm cover the most common residential and light-commercial PVC pipe sizes in a single product family.
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Solvent-Weld Socket Ends
Both ends are machined to accept standard PVC solvent cement, creating a chemically fused joint that matches the tensile strength of the pipe itself.
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Rigid PVC Construction
Moulded from uPVC — unplasticised polyvinyl chloride — for dimensional stability, resistance to chlorinated water, and long service life in buried or exposed runs.
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Corrosion-Free Material
PVC does not rust, pit, or scale, making these couplings suitable for irrigation water, rainwater, and treated potable cold-water systems.
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Clean White Finish
The white colour blends with standard PVC pipe and suits visible installations such as greenhouse frames, pool equipment bays, and under-sink repairs.
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Scaled Wall Thickness
Wall thickness increases proportionally with pipe diameter so each size maintains consistent hoop strength — no weak points at larger diameters.
📐 Technical Specifications — PVC Straight Pipe Coupling Socket
| Material |
Rigid uPVC (unplasticised polyvinyl chloride) |
| Colour |
White |
| Connection Type |
Solvent-weld (socket) both ends |
| Available Inner Diameters |
16 / 20 / 25 / 32 / 40 / 50 / 63 / 75 / 90 / 110 / 125 / 140 / 160 / 200 mm |
| Fitting Type |
Straight coupling (equal socket both ends) |
| Wall Thickness |
See variant options |
| Outer Diameter |
See variant options |
| Working Pressure |
See variant options |
| Temperature Range |
Typically 0 °C to 60 °C (32 °F to 140 °F) for cold-water service |
| Compatible Pipe Standards |
Contact us to confirm (DIN 8061/8062, AS/NZS 1477, Schedule 40, and equivalents) |
| Sold As |
1 piece per order (multi-pack options available — see Amount variant) |
❓ Frequently Asked Questions
How do I choose the correct coupling size?
Select the size that matches your pipe's inner diameter (ID). Measure the bore of your existing pipe with a calliper, or check the pipe's printed markings. Note that PVC pipe outer diameter (OD) varies by schedule and regional standard, so always verify the ID rather than the OD when ordering.
Are these couplings suitable for drinking water (potable water) systems?
These couplings are made from uPVC, which is widely used in cold potable-water pipework. However, compliance with local drinking-water regulations (e.g., NSF/ANSI 61 in North America, WRAS in the UK) depends on your jurisdiction. Please contact us to confirm certification status before installing in a potable-water system.
What solvent cement should I use?
Use a PVC solvent cement rated for the pipe schedule and application (e.g., a medium-bodied all-purpose PVC cement for pressure lines, or a heavy-bodied cement for larger diameters above 63mm). Always apply a PVC primer first on pressure-rated joints. Follow the cement manufacturer's cure time before pressurising the line.
Can I use these couplings for hot water lines?
Standard uPVC is rated for cold-water service, typically up to 60 °C (140 °F) at reduced pressure. For continuous hot-water supply above 60 °C, CPVC or another heat-rated material is recommended. These couplings are not suitable for steam or high-temperature hydronic systems.
How strong is a solvent-welded PVC joint — will it hold under pressure?
A correctly made solvent-weld joint is chemically fused and, once fully cured, typically matches or exceeds the burst pressure of the pipe itself. Joint strength depends on proper surface preparation, correct cement selection, adequate insertion depth, and full cure time. A poorly made joint (insufficient cement, contaminated surfaces, or premature pressurisation) will be the weak point, not the fitting.
Are these fittings UV-resistant for outdoor use?
Standard white uPVC has moderate UV resistance and can be used in outdoor exposed installations for many years, though prolonged direct sunlight may cause surface chalking over time. For long-term outdoor runs, painting with a water-based exterior paint or wrapping with UV-protective tape extends service life significantly.
Do these couplings work with both pressure pipe and drainage pipe?
These straight couplings are compatible with both pressure-rated PVC pipe and lighter-wall drainage PVC pipe, provided the pipe's outer diameter matches the socket bore. Pressure and drainage pipe of the same nominal size often have different ODs, so confirm the ID match before ordering. For drainage applications, a rubber-ring (push-fit) coupling may be more practical for long runs.
🛒 Select your Size (Inner Diameter) and Amount above, then add to cart.
