PVC Straight Pipe Coupling — Socket Fitting for Water Lines, 20mm / 25mm / 32mm

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PVC Straight Pipe Coupling — Socket Fitting for Water Lines, 20mm / 25mm / 32mm

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By HomeDIYer®

Color: White

Size: 20 mm

Amount: 1 PCS

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$5.71 USD

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In stock (500 units), ready to be shipped

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PVC Straight Pipe Coupling — Reliable Slip-Socket Joints for Water Lines & Irrigation

Whether you're repairing a burst irrigation line, extending a residential water supply run, or building out a new plumbing layout, a leaky or mismatched joint can turn a simple job into a costly headache. These PVC straight pipe couplings give homeowners, landscapers, and plumbing contractors a straightforward, solvent-weld solution that holds firm under pressure.

Each coupling is a slip-socket (solvent-weld) straight joint made from rigid white PVC. Available in three metric sizes — 20mm (≈3/4"), 25mm (≈1"), and 32mm (≈1-1/4") — and sold in quantities from 1 to 50 pieces per order so you can match exactly what your project requires. The smooth interior bore and uniform socket depth ensure consistent glue coverage and a secure, leak-free connection every time.

Typical use cases include residential cold-water supply lines, drip and sprinkler irrigation systems, garden water distribution networks, and light-duty drainage runs. These fittings are a go-to choice for anyone searching for metric PVC pipe socket couplings, straight slip-joint fittings for irrigation, or PVC pipe repair couplings for home plumbing projects.

🔗 Compatibility Note: These are metric slip-socket couplings designed for 20mm, 25mm, and 32mm OD PVC pipe. They are not direct replacements for US Schedule 40 or CPVC fittings without an adapter. Verify your pipe's outer diameter before ordering.

⚠️ Installation Note: Always use PVC primer and solvent cement rated for your application. Not recommended for hot-water lines or continuous UV exposure without additional protection.

✅ Key Features of These PVC Straight Pipe Couplings

💧Leak-Free Slip-Socket Design — Uniform socket depth and smooth bore walls ensure full solvent-cement contact for a watertight seal on cold-water supply and irrigation lines.
📐Three Metric Sizes Available — Choose 20mm (≈3/4"), 25mm (≈1"), or 32mm (≈1-1/4") to match your existing metric PVC pipe without adapters or reducers.
🏗️Rigid PVC Construction — Resistant to moisture, soil corrosion, and common household chemicals, making these straight pipe socket fittings suitable for underground and in-wall installations.
⚖️Flexible Quantity Options — Order from 1 to 50 pieces per SKU so you can buy exactly what you need — whether it's a single repair coupling or a bulk supply for a full irrigation build-out.
🔧Tool-Free Joining Process — Solvent-weld installation requires no threading, no clamps, and no special tools beyond standard PVC cement — ideal for DIY plumbing repairs and irrigation system extensions.
🌿Lightweight & Easy to Handle — Low weight per fitting makes these PVC water pipe couplings easy to transport, store, and work with in tight spaces like crawl spaces, trenches, or wall cavities.

📐 Technical Specifications — PVC Straight Socket Pipe Couplings

Fitting Type	Straight Slip-Socket Coupling (Solvent Weld)
Material	Rigid PVC (Polyvinyl Chloride)
Color / Finish	White
Available Sizes (OD)	20mm (≈3/4") / 25mm (≈1") / 32mm (≈1-1/4")
Pipe Standard	Metric DIN/ISO PVC pipe — see variant options
Connection Method	Solvent cement (PVC glue) — slip socket both ends
Working Pressure	Typically 150–300 PSI at room temperature (varies by pipe schedule)
Temperature Range	Generally suitable for cold-water applications; not rated for hot water
UV Resistance	Limited — additional protection recommended for prolonged outdoor exposure
Potable Water	Contact us to confirm NSF/ANSI 61 compliance for your application
Quantity per Order	1 / 2 / 3 / 5 / 10 / 15 / 20 / 25 / 50 PCS — see variant options
Country of Origin	See variant options

❓ Frequently Asked Questions

How do I choose the right size PVC coupling — 20mm, 25mm, or 32mm?

Measure the outer diameter (OD) of your existing pipe. 20mm (≈3/4") is typically used for branch lines and irrigation laterals; 25mm (≈1") suits main supply runs in residential plumbing; 32mm (≈1-1/4") is generally chosen for higher-flow applications or larger irrigation mains. When in doubt, measure twice and match the OD of your pipe to the coupling size listed.

What is the pressure rating of these PVC straight couplings?

Schedule-equivalent PVC socket couplings of this type typically handle working pressures in the range of 150–300 PSI at room temperature, depending on pipe schedule and installation quality. Pressure capacity decreases at elevated temperatures. Confirm the rated pressure with your local plumbing code requirements before installation.

Can these couplings be used outdoors or in underground applications?

PVC is generally resistant to moisture and soil corrosion, making it suitable for underground and outdoor use in most climates. However, prolonged UV exposure can cause surface degradation over time. For above-ground outdoor runs, wrapping or painting the pipe is generally recommended. These couplings are not rated for potable hot-water lines.

What thread or pipe standard do these fittings follow?

These are slip-socket (solvent-weld) couplings designed for metric PVC pipe in 20mm, 25mm, and 32mm OD sizes, commonly used in DIN/ISO metric plumbing systems. They are not directly interchangeable with US Schedule 40 NPT or CPVC fittings without an adapter. Please verify your pipe standard before ordering.

How many couplings do I need for my project?

Count the number of straight pipe joins in your layout — each coupling connects two pipe ends. For irrigation systems, it's generally a good idea to order 10–20% extra to account for cutting errors or future repairs. This listing offers quantities from 1 to 50 pieces so you can match your exact project scope.

What solvent cement should I use to install these PVC couplings?

Use a PVC solvent cement (PVC glue) rated for the pipe schedule and application — typically a clear or gray all-purpose PVC cement for cold-water and irrigation lines. Apply PVC primer first for a stronger bond, especially on larger diameters like 32mm. Follow the cement manufacturer's cure time before pressurizing the line.

Are these couplings safe for drinking water (potable water) use?

These couplings are made from standard white PVC. Suitability for potable water depends on local regulations and whether the specific material grade meets NSF/ANSI 61 certification. If potable water compliance is required, please contact us to confirm the material specification before purchasing.

🛒 Select your size and quantity above, then add to cart — ships from our US warehouse.

PVC Straight Pipe Coupling — Socket Fitting for Water Lines, 20mm / 25mm / 32mm

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Description

PVC Straight Pipe Coupling — Reliable Slip-Socket Joints for Water Lines & Irrigation

✅ Key Features of These PVC Straight Pipe Couplings

📐 Technical Specifications — PVC Straight Socket Pipe Couplings

❓ Frequently Asked Questions

PVC Straight Pipe Coupling — Socket Fitting for Water Lines, 20mm / 25mm / 32mm

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