Clear PVC Straight Pipe Coupling — Socket Fitting 20mm to 110mm

Match the coupling size to your pipe's nominal outer diameter. For example, a 20mm coupling fits 20mm OD PVC pipe (approximately 3/4" nominal), and a 50mm coupling fits 50mm OD pipe (approximately 2" nominal). Always measure your existing pipe's outer diameter with calipers before ordering. If you're unsure, contact us with your measurement and we'll help confirm the right size.

Clear PVC socket couplings generally handle working pressures in the range of 100–150 PSI at room temperature, though the exact rating depends on the pipe schedule, size, and installation conditions. Pressure capacity decreases at higher temperatures — typically by 20–50% at 140°F (60°C). Always verify the rating for your specific application and consult a licensed plumber for high-pressure systems.

Clear PVC can become brittle with prolonged UV exposure. For outdoor installations in direct sunlight, it is generally recommended to paint the fitting with UV-resistant paint or wrap with UV-protective tape. For shaded outdoor areas, underground runs, or indoor applications, clear PVC typically performs well over the long term.

Yes. These straight socket couplings are designed for slip-fit (solvent weld) connections using standard PVC primer and cement. They are compatible with Schedule 40 PVC pipe of the corresponding nominal size. Always clean and prime both the pipe end and the socket interior before applying cement, and allow full cure time before pressurizing the line.

Count the number of straight joints your project requires before ordering. Multi-packs (2, 3, or 5 pieces) offer a lower per-unit cost and are ideal for irrigation system layouts, multi-run plumbing projects, or keeping spares on hand for future repairs. A single piece is the right choice for a quick one-off repair or to test fit before committing to a larger order.

Clear PVC fittings are commonly used in non-potable water systems, irrigation, aquariums, and pond plumbing. For drinking water applications, the fitting should carry NSF/ANSI 61 certification. Please contact us to confirm potable water compliance for your specific size before purchasing if this is a requirement for your project.

A socket (slip) coupling uses solvent cement to permanently bond smooth pipe ends inside the fitting socket — no threads required. This creates a strong, leak-resistant joint that is generally preferred for permanent plumbing runs. A threaded coupling uses male/female threads for a removable connection. These fittings are socket-type, making them the right choice for permanent water pipe extensions and repairs.

These couplings are designed for standard PVC pipe. CPVC pipe typically has a different OD and requires CPVC-specific fittings and cement. ABS pipe uses a different solvent cement chemistry. In most cases, mixing pipe materials is not recommended without transition fittings. Contact us to confirm compatibility if you are working with a non-standard pipe material.