Start with the place, not a part name.
The most useful first detail is often the simplest: where did you find the water? “Inside the cabinet below the bathroom sink” gives a clearer starting point than “somewhere in the bathroom.” Name the room, the nearby fixture, and the surface that looks wet.
Keep the observation separate from the explanation. Water beneath a sink does not, by itself, identify which fitting or pipe needs attention. You can describe what you see without deciding what caused it. If you cannot tell where it begins, say that.
What does the wet area look like?
Think about what you already noticed: a small bead of water, a repeated drip, a damp patch, or water collecting on a surface. Is it at the cabinet bottom, beside a fixture, or along an exposed connection? Mention whether the surrounding area seems dry or whether there is another visible wet spot nearby.
Describe color or staining only as an observation. A mark does not tell you how long a problem has existed or whether the water is still appearing. You do not need to remove panels, reach into a confined space, or touch fittings to gather more information.
Tell the sequence as you remember it.
When did you first see the change? Perhaps you found the cabinet wet after using the basin, or noticed a patch while putting something away. Explain that sequence without running the fixture again to prove a connection. If you do not know whether the timing is related, leave it as a question.
A short description might be: “I found water on the bottom shelf under the kitchen sink this morning. I can see a damp patch, but I can’t tell where it starts.” That is enough to begin. If the concern has changed since then, describe the change too.
Make the next conversation practical.
Call with your property address and ask whether this kind of concern can be accommodated. Explain whether water is still appearing and whether access to the area is straightforward. Ask what an initial assessment would involve, whether there is a visit charge, and how any proposed work and costs would be explained.
If you live in a rental or a building with shared plumbing, contact the person responsible for arranging work and mention that arrangement when calling. Do not open pipework or treat this checklist as a repair instruction. If the area is unsafe to approach, do not enter it just to obtain a better description.
Questions & answers
Before the call.
Do I need to know which pipe is leaking?
No. Tell the business where water is visible and what you have noticed. If the source is hidden or unclear, say so. You do not need to identify a failed part before asking about an assessment.
What if the patch is dry now?
Mention that it is dry at the moment, when you last noticed moisture, and whether a mark remains. Avoid describing a dry mark as an active leak unless you have actually seen water appearing.
What if the tap is dripping into the basin?
A drip from the tap itself fits the faucet and fixture guide. Water appearing outside the basin or underneath it fits this leak guide. If you have noticed both, explain each observation separately.
Can a repair and price be confirmed from my description?
Ask what information is needed and how an assessment would work. A description helps start the conversation; it does not establish a cause, a repair plan, or a price. Discuss charges and approval before making arrangements.