UPVC Water Supply Pipe Cap Stop End Lock Fittings I.D 20mm-100mm Solvent Weld

Match the fitting's internal diameter (I.D.) to the outside diameter (O.D.) of your UPVC pipe. Standard Schedule 40 / Class D UPVC pipe is sized by nominal bore, so a 20 mm nominal pipe typically has an O.D. of approximately 25 mm — the fitting socket is machined to accept that O.D. If you are unsure, measure the pipe O.D. with calipers and cross-reference against the manufacturer's pipe data sheet before ordering.

No. These fittings are designed specifically for rigid UPVC pressure pipe. CPVC and ABS have different outside diameters and require their own dedicated solvent cements and fittings. Using a UPVC cap on CPVC or ABS pipe will result in a poor fit and an unreliable bond. Always match fitting material to pipe material.

Use a PVC solvent cement rated for pressure pipe (look for compliance with ASTM D2564 or equivalent). Apply primer to both the pipe end and fitting socket, then apply cement to both surfaces and push the pipe firmly into the socket with a quarter-turn. Initial set typically takes 15–30 minutes; allow a full 24 hours before pressurising the system. Cure times vary with temperature and humidity — follow the cement manufacturer's instructions.

UPVC is rated for cold water supply and is generally suitable up to approximately 60 °C (140 °F) at reduced pressure. For continuous hot water lines above 60 °C, CPVC or copper fittings are the appropriate choice. These caps are intended for cold water supply, irrigation, and drainage termination applications.

Cut the pipe square and deburr the end thoroughly. Clean both surfaces with a lint-free cloth and apply PVC primer. While the primer is still tacky, apply an even coat of solvent cement to the pipe O.D. and the fitting socket I.D. Push the cap onto the pipe with a firm, twisting motion and hold for 30 seconds. Wipe away excess cement immediately. Do not disturb the joint for at least 15 minutes and do not pressurise for 24 hours.

No. Solvent welding creates a permanent chemical fusion between the fitting and the pipe — the joint cannot be disassembled without cutting. If you anticipate needing future access to the pipe end, consider using a threaded end cap with a UPVC male adaptor instead, which allows removal with a wrench.

Yes, with conditions. UPVC is resistant to soil chemicals and moisture, making it suitable for buried installations. For above-ground outdoor use, the UV-stabilised formulation provides resistance to intermittent sunlight. For prolonged direct UV exposure, painting the fitting with a water-based exterior paint adds an extra layer of protection. Always follow local plumbing codes for burial depth and bedding requirements.