Drain pipe drips at a joint only when water runs through it
A drain line that drips only while water runs through it has a failed joint, and failed joints are repaired. Nothing in a drain is under pressure, so a plumber cuts out the bad fitting, glues or tightens a new one in its place, and tests the run. The pipe either side of it stays. Dry the pipes first, then run one fixture at a time and watch, because several wet joints in one section point at a run that is unsupported and gets rebuilt rather than patched.
Read the full guideWater bubbles up in the yard or sprays under the house
Water that keeps coming up out of the ground, or sprays under the floor, when nobody is running water is a leak on a pressurized supply line. That line stays under pressure day and night, so it does not stop on its own and it does not heal. Shut the water off at the street meter and watch the meter dial. If the dial still creeps with every fixture off, the leak is on your side of the meter and a plumber locates it and replaces that section of pipe.
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