Epsom · Leak detection
Leak Detection in Epsom
A hissing sound inside a wall can be unsettling, especially when every tap appears to be off. It could be water escaping under pressure, but sound can also travel from a valve or fixture elsewhere.
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Stately covers Epsom, investigating where the noise starts before recommending access or repairs. Tell us when you first heard it, whether it continues overnight, and whether there are any damp patches, so we can plan the initial checks.
Notice what changes the sound
Start by listening from a few safe positions around the room. Note whether the hiss is strongest near a bathroom, kitchen or another water connection. Check whether it stops after a toilet finishes filling or changes when someone uses a tap. These observations help narrow the checks.
Look for darkened paint, swelling skirting, a musty smell or a patch that feels damp. A dry surface can still conceal moisture deeper in the wall. Photograph visible changes and note the time, but avoid pressing softened lining, removing fittings or making exploratory holes around the sound.
Check the likely source onsite
We first listen to the noise as you hear it, then check nearby fixtures and accessible pipework. A filling valve or restricted fitting can produce a hiss that carries through framing. We compare the sound with water use and look for evidence that points towards escaping water.
Depending on what we find, checks may include moisture readings, pressure testing and acoustic listening. Each gives different information: a moisture reading suggests where material is wet, while a pressure change can indicate loss from a tested section. We compare the results rather than treating one reading as proof.
More about leak detection in Epsom
Plan isolation and access
If the noise suggests an active leak, we discuss isolating the affected supply while investigations continue. That might mean shutting off one branch or the property's supply, depending on the available valves. We explain which fixtures will be unavailable and check whether the isolation has changed the hiss.
Opening the wall may be needed to confirm the source or reach a damaged fitting. Before cutting, we explain the proposed location, likely opening size and any access limitations. We consider nearby services and whether another accessible route offers a more sensible approach to the suspected pipe.
Match the repair to the findings
Once the source is exposed or otherwise confirmed, we explain what has failed and what the surrounding pipework shows. A repair might involve a joint, fitting or section of pipe. The choice depends on its condition, available access and whether adjacent components can support a sound repair.
If testing points to a noisy valve rather than a concealed leak, we explain that distinction and the evidence behind it. If the results remain uncertain, we set out the next targeted check. We avoid recommending wider pipe replacement solely because a hiss is audible through the wall.
Test and explain what happens next
After a repair, we restore the supply carefully and check the repaired area under operating conditions. We listen again where the hiss was first heard and check for further signs of leakage. Any accessible wet areas are reviewed so you understand what still needs drying or further attention.
The handover covers what we found, what was repaired and any parts we could not inspect. We explain whether the wall should remain open for drying or observation before reinstatement. You also receive practical signs to watch for, including returning noise, fresh dampness or a change in pressure.
Leak detection: questions from Epsom
Should I turn the water off immediately?
If dampness is spreading or water is escaping, close the accessible water stop tap if you can do so safely. Avoid forcing a stiff valve. Contact us for guidance.
Can a hiss mean a leak if the wall is dry?
Yes. Moisture may remain concealed before reaching the surface. However, a valve or flowing fixture can also transmit noise, so the sound needs checking alongside other evidence.
What should I prepare before you arrive?
Clear safe access to the affected wall and any known shut-off valves. Share a short recording if the hiss is intermittent, and note which water use changes it.
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