A pipe may keep leaking after a repair because the water is coming from a different point, the original cause has not been dealt with, or the repaired joint has been disturbed. It does not always mean the repair itself failed, so the pipe needs checking again to find out why.
Finding the reason matters, because repeating the same fix may not solve the problem. A second look often focuses on what was missed the first time.
The Leak May Be Coming From Somewhere Else
Water can run along a pipe before it drips, so a leak can look as if it is in one place when it starts nearby. If a second joint, valve or fitting is also weeping, repairing one may not stop the water completely.
The water may also not come from the supply pipe at all. A waste pipe, a seal on an appliance, condensation or water from outside can all leave water in a similar place. If you are unsure where it is coming from, our leak detection page explains how the source of a hidden leak can be narrowed down.
The Original Cause Is Still There
Some leaks happen because of an underlying problem. A pipe that moves each time water flows, pipework under strain, or a section that is corroded along its length may cause new leaks after one point has been repaired.
If a pipe has frozen before, it may have weak spots that are not obvious until later. In these cases, the plumber may suggest dealing with the cause as well as the leak, such as adding support or replacing a longer section.
The Repaired Joint Has Been Disturbed
A joint can be disturbed if the pipe is knocked, if something is stored against it, or if nearby work is carried out. A fitting may also not suit the type of pipe it was used on, or may have been tightened too much or too little.
If you have tried a DIY fix, such as tape or sealant, it may only have held for a short time, and it can make a proper repair harder.
What to Do If It Keeps Leaking
Catch the drips and keep the area dry, and close the nearest isolating valve if the leak is steady and the valve turns normally. Take a photo of where the water appears and note when it happens, such as only when a tap is running. This can help show whether the leak is on the supply or a waste pipe.
Let whoever carried out the repair know, and describe what you have seen. Our page on professional leaking pipe repairs explains how leaking pipes are assessed and what a lasting repair may involve.
If a pipe at your Poole property is still leaking after a repair, a plumber can look at what is happening and explain the next step.