How to Repair a Leaking PVC Pipe Joint

Clean and dry the leaking joint completely, then apply PVC primer and cement to create a permanent seal, or use pipe repair clamps for temporary fixes.

1. Stop the water flow completely. Shut off the main water supply or the valve controlling the affected pipe. Open faucets downstream to drain remaining water from the system. The pipe must be completely dry before applying any repair materials.
2. Scour the joint bare. Use a wire brush or sandpaper to remove any dirt, debris, or old cement from around the leaking joint. Wipe the area clean with a rag. For best results, lightly sand the pipe surface to create better adhesion for the new cement.
3. Prime both surfaces fast. Use a brush or applicator to coat both the pipe end and the inside of the fitting with PVC primer. The primer softens the plastic and prepares it for bonding. Work quickly as primer dries fast.
4. Cement while primer's wet. While the primer is still wet, brush PVC cement onto both surfaces using smooth, even strokes. Apply cement generously but avoid drips. You have about 10-15 seconds to make the connection before it sets.
5. Seat the joint firmly. Push the pipe into the fitting with a slight twisting motion until it bottoms out. Hold firmly in place for 30 seconds without moving. A bead of cement should appear around the joint, indicating a proper seal.
6. Let time seal the bond. Wait at least 2 hours before turning water back on for small repairs, or 24 hours for larger joints under pressure. Test the repair gradually by slowly opening the water supply and checking for leaks.