Before calling about a bathroom faucet, identify where the water appears and whether the problem is constant or occurs only while the faucet runs. A few safe observations can help a provider distinguish a faucet component from a supply or drain issue.
Locate The Leak
Dry the faucet, handles, counter, and cabinet area, then run the faucet briefly while watching for the first wet spot. Water from the spout with the handles closed suggests an internal valve or cartridge issue. Water around a handle may involve a seal. Water beneath the sink can come from supply lines, shutoff valves, the faucet shank, or the drain, so do not assume every leak is inside the faucet.
Check The Flow Without Taking It Apart
A weak stream may come from a clogged aerator, partially closed shutoff, kinked supply line, mineral buildup, low pressure, or a restriction elsewhere. Confirm that both shutoff valves are open if they turn normally, but do not force corroded valves. Compare hot and cold flow. A problem on only one side can provide a useful clue, while weak flow at several fixtures suggests a broader issue.
Identify The Faucet
Take a photo of the faucet, handles, underside connections, and any visible brand mark. Note whether it has one handle, two handles, a pull-out design, or a widespread installation. Cartridge and washer designs are not interchangeable, and an older model may have limited parts availability. Sink-hole spacing and finish matter if replacement becomes more practical.
Repair Or Replace
A repair may be reasonable when the faucet body is sound and the correct cartridge, washer, aerator, or seal is available. Replacement may be preferable when the body is cracked, corroded, hard to operate, repeatedly repaired, or leaking at several points. A new faucet must fit the sink configuration and connect to sound shutoff valves.
Protect The Cabinet
Remove stored items and place a dry towel below the connections. If the leak is active and the shutoff works safely, close the affected valve. Do not use excessive force on fittings or apply sealant to hide a failed connection. Drying the cabinet and documenting the source can help limit damage while arranging service.
Questions To Ask
Ask whether the issue is the faucet, supply connection, shutoff, or drain. Confirm whether the proposed work is a component repair or replacement and whether old valves may affect the job. Ask what part is being used and whether the provider will test for leaks and proper hot-and-cold operation afterward.