It is common for moisture to collect around plumbing fixtures, but excessive dampness can indicate a leak needing prompt attention. Examining for water stains around fixtures involves the following steps:
Look for water stains, mold growth, or discoloration on the wall surrounding the fixture. These signs may indicate a leak in the plumbing behind the wall.
Examine the caulking around the base of the fixture and where it meets the wall. Worn or cracked caulking can allow water to seep through and cause stains.
Place a paper towel against the wall near the fixture. If the towel becomes damp within a short period, it suggests a leak.
Check the fixture itself for leaks. Tighten any loose screws or nuts that could be allowing water to escape.
Monitor water usage in the area where the fixture is located. An increase in water consumption without an apparent cause may indicate a hidden leak.
To detect dampness in a wall, you can use the following methods: