What thread or connection standard do these fittings use?

These are solvent-weld (plain socket) fittings — they do not use threads. They are designed to be bonded with PVC solvent cement to plain-end PVC pipe. The socket dimensions generally conform to ISO 1452 / DIN 8063 standards. They are not compatible with BSP or NPT threaded pipe without an adapter.

What solvent cement should I use to install these fittings?

Use a standard PVC solvent cement (also called PVC glue or PVC primer + cement). Clean and dry both the pipe end and socket interior, apply primer if required by local code, then apply cement to both surfaces and push firmly together with a slight twist. Allow adequate cure time before pressurizing — typically 15–30 minutes for light handling and 24 hours for full pressure service.

PVC Straight Pipe Coupling Socket Fitting 20–110mm Grey

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PVC Straight Pipe Coupling Socket Fitting 20–110mm Grey

Name: PVC Straight Pipe Coupling Socket Fitting 20–110mm Grey
Brand: HomeDIYer
Price: 6.38 USD
Availability: InStock

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Size: 20mm

Package Quantity: 1pcs

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PVC Straight Pipe Coupling — Reliable Socket Fitting for Water Pipe Repairs & Extensions

When a pipe cracks, a line needs extending, or a plumbing run has to change direction back to straight, finding a coupling that fits cleanly and holds pressure is the difference between a quick fix and a weekend headache. DIYers, plumbers, and irrigation installers who work with PVC pipe regularly know that having the right socket coupling on hand — in the exact diameter — saves a second trip to the hardware store.

Each piece is a grey PVC straight socket coupling (also called a socket union or sleeve coupling) with a plain solvent-weld socket on both ends. Available in nine sizes from 20mm (≈3/4") to 110mm (≈4-3/8"), and sold in 1-piece, 2-piece, or 3-piece packs. The fitting is manufactured from rigid PVC (polyvinyl chloride) with a smooth interior bore and a consistent wall thickness designed to maintain full flow capacity through the joint.

Typical applications include residential cold-water supply repairs, garden and drip irrigation line extensions, pool and spa plumbing connections, and drainage or conduit runs where a straight inline joint is needed. The 20–32mm sizes are popular for PVC straight coupling irrigation repair, while the 50–110mm sizes suit main supply lines and drainage coupling replacement projects.

🔵 Compatibility: Designed for standard PVC pipe (ISO 1452 / DIN 8063 socket dimensions). Solvent-weld connection — requires PVC solvent cement (not included). Not compatible with CPVC, ABS, or threaded pipe without an adapter. Size refers to pipe outer diameter (OD).

✅ Key Features of These PVC Straight Socket Couplings

📐Nine Size Options — Covers 20mm through 110mm (≈3/4" to ≈4-3/8"), making it straightforward to match your existing PVC pipe OD without adapters or reducers.
💧Full-Bore Smooth Interior — The straight-through socket design maintains the pipe's internal diameter at the joint, minimizing flow restriction in water supply and irrigation coupling applications.
🔩Solvent-Weld Socket Ends — Both ends accept standard PVC solvent cement for a chemically fused, leak-resistant joint that becomes structurally integral with the pipe — no clamps or mechanical fasteners needed.
🏗️Rigid PVC Construction — Grey rigid PVC resists corrosion, scale buildup, and common household chemicals, making it a dependable choice for cold-water pipe socket fitting installations in walls, slabs, and underground runs.
📦Flexible Pack Quantities — Choose 1, 2, or 3 pieces per order to match your project scope — whether it's a single PVC pipe repair coupling or stocking up for a multi-joint irrigation line.
⚡Fast, Tool-Free Installation — No threading, no special tools. Clean, prime (where required), cement, and push — the joint is typically hand-tight within seconds and ready for light service in under 30 minutes.

📐 Technical Specifications — PVC Straight Socket Coupling

Product Type	PVC Straight Socket Coupling (Sleeve Coupling)
Connection Type	Solvent-weld (plain socket, both ends)
Material	Rigid PVC (Polyvinyl Chloride)
Color / Finish	Grey
Available Sizes (Pipe OD)	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"), 110mm (≈4-3/8")
Pack Options	1 piece / 2 pieces / 3 pieces
Pressure Rating	See variant options (varies by size; typically rated for cold-water pressure service)
Temperature Rating	Generally suitable for cold water (up to typically 60°C / 140°F); not recommended for hot water or steam
Dimensional Standard	Generally conforms to ISO 1452 / DIN 8063 socket dimensions
Compatible Pipe	Standard PVC pressure pipe (plain end)
Installation Method	PVC solvent cement (not included)
Country of Origin	Contact us to confirm

⚠️ Note: Always verify the pipe OD with calipers before ordering. Nominal pipe sizes vary by schedule and standard — the size listed refers to the pipe outer diameter this coupling is designed to accept.

❓ Frequently Asked Questions

How do I choose the right size PVC coupling for my pipe?

Match the coupling size to your pipe's outer diameter (OD). Common conversions: 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", 110mm ≈ 4-3/8". When in doubt, measure your pipe OD with calipers before ordering — do not rely on nominal pipe size alone, as schedules vary.

What pressure rating do these PVC couplings typically handle?

PVC socket couplings of this type are generally rated for cold-water pressure service. Smaller sizes (20–40mm) typically handle up to 10–16 bar (145–232 psi) when properly solvent-welded; larger sizes (50–110mm) are generally rated lower. Always verify the pressure rating for your specific application and consult local plumbing codes.

Can these couplings be used outdoors or underground?

Grey PVC is generally suitable for underground and sheltered outdoor use. For prolonged direct UV exposure, consider painting or wrapping the fitting, as extended sunlight can degrade unprotected PVC over time. For fully outdoor above-ground runs, UV-stabilized fittings may be a better long-term choice.

What connection standard do these fittings use — are they threaded?

These are solvent-weld (plain socket) fittings — they do not use threads. They bond to plain-end PVC pipe using PVC solvent cement. Socket dimensions generally conform to ISO 1452 / DIN 8063 standards. They are not compatible with BSP or NPT threaded pipe without a separate threaded adapter.

Are these couplings compatible with CPVC or ABS pipe?

These fittings are designed for standard PVC pipe. They are generally not recommended for CPVC (which requires CPVC-rated cement and fittings) or ABS pipe (which uses a different solvent cement chemistry). Always match fitting material and cement type to your pipe material.

How many pieces do I need for a typical repair or extension?

For a single pipe join or repair, 1 coupling is typically sufficient. If you are running a longer line with multiple joints, or want spares on hand, the 2-pack or 3-pack options offer better value per piece. For larger irrigation or plumbing projects, buying in multi-packs is generally more cost-effective.

What solvent cement should I use, and how long does it take to cure?

Use a standard PVC solvent cement (primer + cement, or one-step cement where permitted by local code). Clean and dry both surfaces, apply primer if required, then apply cement to both the pipe end and socket interior. Push firmly together with a slight twist and hold for 30 seconds. Allow typically 15–30 minutes before light handling and 24 hours before full pressure service. Cure times vary by temperature and humidity.

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PVC Straight Pipe Coupling Socket Fitting 20–110mm Grey

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Description

PVC Straight Pipe Coupling — Reliable Socket Fitting for Water Pipe Repairs & Extensions

✅ Key Features of These PVC Straight Socket Couplings

📐 Technical Specifications — PVC Straight Socket Coupling

❓ Frequently Asked Questions

PVC Straight Pipe Coupling Socket Fitting 20–110mm Grey

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