Water dripping out my overflow pipe outside

Question

There was no hot water this morning so my wife turned up the pressure on our combi boiler.Unfortunately she turned it up too high.I noticed there’s water coming out at the back of the overflow pipe outside.How can I fix this?

Darius · Answer

Is going to be blocked 
You need to clean your pipes.

Sean · Answer

Drop some pressure out at the boiler, as long as the expansion vessel doesn't have an issue

Paulo · Answer

All you need to do is drop the pressure, that's why the prv is releasing the extra amount of pressure when the heating is on

Tommy · Answer

Sounds like the pressure relief valve (PRV) in the boiler is discharging.  Release some pressure from the system, bring down to 1.2 bar and it should stop discharging. if it persists after you have lowered to pressure then it sound like you will need to get the PRV changed.  Hope this helps

Alexander · Answer

The small diameter pipe you saw leaking could likely be a condense line [If the boiler is a relatively modern combi] - This is normal.

If the pressure is to high, a pressure release valve will discharge a certain amount of pressure, however the best course of action would be to get an engineer to drain some pressure out and check the system to see why you had an issue in the first place.

If you are confident with DIY, drain some water out of a central heating pipe via a drain off valve and check the pressure after.

Ostap · Answer

You have to drain the system back to 1.5 bar. Through drain off under radiators.

Mohsen · Answer

Hi mate just bleed a bit of water from your radiator valve until the pressure comes into green. I hope it helps

Ross · Answer

Pressure on boiler to high air radiators or open drain off to bring it down to about 1.5 bar

Jarryd · Answer

Hi Craig , you will need an engineer to come over and have a look at it as the prv on you’re boiler might be letting by , I can come have a look tomorrow if you’re happy to

Water dripping out my overflow pipe outside

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