White PVC Straight Coupling Socket Fitting — Reliable Solvent-Weld Pipe Connection for DIY Plumbing
When a leaking or mismatched pipe joint derails your plumbing project, you need a PVC straight coupling socket fitting that simply works. Whether you are a homeowner tackling a bathroom renovation, a gardener extending an irrigation line, or a contractor running drainage runs, a dependable solvent-weld coupling is the backbone of every clean, watertight connection.
These white PVC straight socket couplings are manufactured from rigid PVC (polyvinyl chloride) and are designed for solvent-cement (glue) bonding. Each fitting features a smooth internal bore sized to the nominal inner diameter, with a wall thickness typically ranging from 1.8 mm to 4.5 mm depending on the size selected. Available inner diameters span 16 mm (approx. 5/8 in) through 160 mm (approx. 6-1/4 in), covering the most common metric pipe schedules used in residential and light commercial applications.
Typical use cases include joining PVC pressure pipe in cold-water supply lines, connecting conduit sections in electrical or cable-management runs, and assembling gravity-fed drainage or stormwater systems. Long-tail search terms such as "PVC solvent weld straight connector 32mm", "white PVC pipe coupler 50mm DIY", and "metric PVC coupling fitting 110mm drainage" all describe exactly what this fitting delivers.
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Compatibility: Designed for metric-sized rigid PVC pipe (Schedule 20 / PN10 equivalent). Confirm your pipe's outer diameter matches the fitting's inner diameter before ordering. Not suitable for CPVC, ABS, or rubber-jointed pipe systems.
✅ Key Features of These PVC Straight Coupling Socket Fittings
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Full-Range Size Selection — Inner diameters from 16 mm to 160 mm (approx. 5/8 in to 6-1/4 in) cover the widest range of metric PVC pipe sizes in a single product listing.
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Watertight Solvent-Weld Bond — The smooth, precision-machined socket bore accepts standard PVC solvent cement for a chemically fused, leak-free joint that meets typical residential water-pressure requirements.
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Corrosion & Chemical Resistance — Rigid PVC is inherently resistant to rust, scale, and a broad range of household chemicals, making these couplings suitable for both water supply and drainage applications.
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UV-Stabilised White Finish — The bright white colour reflects heat and the UV-stabilised compound resists surface degradation in exposed outdoor installations such as irrigation manifolds or above-ground conduit runs.
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Flexible Quantity Options — Available in packs of 1, 2, 5, or 10 pieces so you can order exactly what your project requires without overstocking.
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Lightweight & Easy to Handle — PVC's low density keeps fitting weight minimal, reducing fatigue during overhead or confined-space installations and simplifying transport to the job site.
📐 Technical Specifications — PVC Straight Coupling Socket Fitting
| Material |
Rigid PVC (Polyvinyl Chloride) |
| Colour |
White |
| Connection Type |
Solvent Cement (Glue) Socket |
| Inner Diameter (ID) |
16 mm / 20 mm / 25 mm / 32 mm / 40 mm / 50 mm / 63 mm / 75 mm / 90 mm / 110 mm / 125 mm / 140 mm / 160 mm |
| Wall Thickness |
See variant options |
| Pressure Rating |
See variant options |
| Operating Temperature |
0 °C – 60 °C (32 °F – 140 °F) |
| Standard |
See variant options |
| Pack Quantity |
1 / 2 / 5 / 10 pieces |
| Finish |
UV-Stabilised Gloss White |
❓ Frequently Asked Questions
How do I choose the correct inner diameter for my pipe?
Measure the outer diameter (OD) of your existing pipe with a calliper or tape measure. For standard metric PVC pipe, the fitting's inner diameter (ID) is sized to accept that pipe's OD with a snug slip fit. For example, a 32 mm ID coupling accepts pipe with a 32 mm OD. If you are unsure, bring a short pipe sample to compare before ordering.
Can these couplings handle mains water pressure?
Rigid PVC solvent-weld fittings in the smaller sizes (16 mm–63 mm) are typically rated for PN10 (10 bar / 145 psi) cold-water service when properly bonded. Larger sizes (75 mm–160 mm) are generally used in lower-pressure drainage and gravity-flow applications. Always verify the pressure rating for your specific size variant before installation in pressurised systems.
Are these fittings resistant to corrosion and chemicals?
Yes. PVC is inherently non-metallic and will not rust, corrode, or scale. It is resistant to most household acids, alkalis, and salts. It is not recommended for use with concentrated solvents, aromatic hydrocarbons, or chlorinated solvents, which can degrade PVC over time.
What type of glue or cement should I use?
Use a PVC-specific solvent cement (also called PVC glue or solvent weld adhesive) that is compatible with rigid PVC pipe. Apply a thin, even coat to both the pipe end and the inside of the socket, push together with a slight twist, and hold for 30 seconds. Allow the joint to cure for the time specified on the cement packaging before pressurising the system.
Are these fittings compatible with CPVC or ABS pipe?
No. These fittings are designed for rigid PVC pipe only. CPVC pipe has a different OD schedule and requires CPVC-rated cement and fittings. ABS pipe uses a different solvent cement chemistry. Mixing materials can result in weak joints and potential leaks.
Can I use these outdoors or in direct sunlight?
Yes. The white UV-stabilised compound resists surface chalking and degradation from sunlight exposure, making these couplings suitable for above-ground outdoor installations such as irrigation manifolds, garden water lines, and exposed conduit runs. For long-term buried applications, standard PVC performs well without additional protection.
How do I decide between ordering 1, 2, 5, or 10 pieces?
Count the number of straight joints your project requires, then add one or two spares for any cuts that need to be redone. For small repairs, a 1- or 2-piece pack is sufficient. For new installations or irrigation systems with multiple runs, the 5- or 10-piece pack offers a lower per-unit cost and ensures you have extras on hand without a second order.
🛒 Select your inner diameter and quantity above, then add to cart.
