Grey PVC Straight Coupling Sleeve — Reliable Solvent-Weld Pipe Joints from Ø20 to Ø200mm
When a pipe run needs a clean, leak-free extension or repair, a poorly matched fitting is the fastest way to turn a straightforward job into a weekend-long headache. Whether you are a plumber routing cold-water supply lines, a DIYer extending a drainage run, or a facilities manager maintaining irrigation infrastructure, these grey PVC straight coupling sleeves give you a dimensionally accurate, solvent-weld-ready joint every time.
Each coupling is moulded from rigid grey PVC (polyvinyl chloride) and conforms to standard metric pipe dimensions. Inner diameters span Ø20 mm (approx. ¾ in) through Ø200 mm (approx. 8 in), with wall thickness typically 2–6 mm depending on size. The smooth internal bore and square-cut socket ends ensure full contact with the pipe spigot for a consistent glue-line.
Typical applications include cold-water supply plumbing, above-ground and below-ground drainage systems, garden and agricultural irrigation networks, and industrial process pipework where chemical resistance to dilute acids and alkalis is required. The lightweight construction also makes these couplings a practical choice for conduit runs in electrical and cable management installations.
🔗 Compatible with standard metric grey PVC pressure and drainage pipe. Designed for solvent-cement (glue) jointing. Not suitable for push-fit or threaded connections.
✅ Key Features of These PVC Straight Coupling Sleeve Fittings
📐Full Metric Size RangeAvailable from Ø20 mm to Ø200 mm inner diameter, covering the most common residential, commercial, and light-industrial pipe sizes in a single product line.
🧪Rigid PVC ConstructionMoulded from unplasticised PVC, these couplings resist corrosion, scale build-up, and a wide range of dilute chemicals, making them suitable for both water and non-aggressive fluid systems.
🔧Solvent-Weld Ready Socket EndsBoth socket ends are machined to tight dimensional tolerances, providing the even glue-line gap needed for a strong, permanent solvent-cement bond with standard PVC pipe cement.
⚖️Lightweight Yet RigidPVC's low density keeps handling and installation effort minimal, even for larger diameters, without sacrificing the structural rigidity needed to maintain pipe alignment under pressure.
🌡️Suitable for Cold-Water ApplicationsRated for continuous use with cold water and non-aggressive fluids. The grey colour coding is consistent with standard cold-water and drainage pipe conventions for easy system identification.
📦Flexible Pack QuantitiesOrder 1, 2, 3, 5, or 10 pieces per transaction to match your exact project requirement — whether a single repair or a bulk installation run — without over-ordering.
📐 Technical Specifications — PVC Straight Coupling Sleeve Fittings
| Material |
Rigid PVC (Polyvinyl Chloride) |
| Colour |
Grey |
| Connection Type |
Solvent-weld (glue) socket × socket |
| Inner Diameter Range |
Ø20 mm – Ø200 mm (see variant options) |
| Wall Thickness |
See variant options (typically 2–6 mm) |
| Pipe Standard Compatibility |
Standard metric PVC pressure and drainage pipe |
| Temperature Rating |
Suitable for cold-water service (up to approx. 60 °C short-term) |
| Chemical Resistance |
Resistant to dilute acids, alkalis, and most salts |
| Pack Quantity Options |
1 / 2 / 3 / 5 / 10 pieces |
| Fitting Type |
Straight coupling (equal bore, both ends same diameter) |
❓ Frequently Asked Questions
Which size coupling do I need for my pipe?
Select the coupling whose inner diameter matches the outer diameter of your pipe spigot. For example, a Ø20 mm coupling is designed to accept a standard 20 mm OD PVC pipe. If you are unsure, measure the outside diameter of your pipe and match it to the listed inner diameter. When in doubt, contact us to confirm before ordering.
Can I use these couplings for hot-water systems?
These grey PVC couplings are rated for cold-water and drainage applications. Rigid PVC begins to soften at temperatures above approximately 60 °C, so they are not recommended for continuous hot-water supply lines. For hot-water systems, consider CPVC or copper fittings instead.
What adhesive should I use to join these fittings?
Use a standard PVC solvent cement (pipe glue) formulated for rigid PVC. Apply a thin, even coat to both the pipe spigot and the inside of the coupling socket, push together with a slight twisting motion, and hold for 30 seconds. Allow the joint to cure fully before pressurising the system — typically 15–30 minutes for handling strength and 24 hours for full pressure rating.
Are these fittings suitable for underground or buried installations?
Yes. Rigid PVC is widely used in below-ground drainage and irrigation applications. It is resistant to soil moisture and most ground chemicals. Ensure the pipe and fittings are bedded in suitable granular material and that the trench is backfilled carefully to avoid point loading on the fitting body.
How do I ensure a leak-free solvent-weld joint?
Clean and dry both surfaces before applying cement. Lightly abrade the pipe spigot with fine sandpaper to improve adhesion. Apply cement quickly and evenly, assemble immediately, and avoid disturbing the joint for at least 30 seconds. Work in a well-ventilated area and follow the cement manufacturer's curing time guidelines before pressure-testing.
Can these couplings be used for electrical conduit or cable management?
Grey PVC straight couplings are commonly used to join sections of PVC conduit in electrical and data cable installations. Confirm that the coupling inner diameter matches your conduit outer diameter. Note that conduit-grade and pressure-pipe-grade PVC fittings may have different wall thicknesses, so verify dimensional compatibility before installation.
Do you offer other fittings such as elbows, tees, or reducers?
Yes. HomeDIYer stocks a range of PVC fittings including elbows, tees, reducers, end caps, and more. Browse our PVC Fittings collection or use the search bar to find the specific fitting type you need.
🛒 Select your inner diameter and quantity above, then add to cart.
