Water Pressure Too High!

[andy978]

I have a Baxi Main combi boiler and decided to leed one of the rads. One rad seems to have load of air in as it took a few minutes to bleed. I then notice the pressure on the gauge was below 0.5, so topped up the boiler. I stopped when the needle was at around 1.5, but the needle continued to go until it was at 3 (in the red).

I thought I could reduce this by bleeding the rads again to remove some of the water, but it hasn't done much.

Is there an easy way to resolve this issue? Will having high pressure cause an major problems?

Many Thanks for your help.

 

[Pete1987]

yes try and bleed one of the rads again, I done this to out combo boiler, so went round bleeding all the rads and it seem to drop it on ours.

hope it helps

 

[studips]

the pressure vessel in the boiler will hold a fair bit of water, that's why bleeding it is slow to release the pressure.

if you have a drain off point, that would be quicker.

 

[andy978]

3 litres removed, and still the needle is on 3. It could be a long night.

I'm not sure what a drain off valve would look like, so seems like I might be best to continue with this.

Would it harm to leave it until tomorrow?

 

[majorevent]

sound as if one of the filling loop valves have not shut off completely.
you should remove the metal braided hose ( should not be left connected any way) if you get water dripping out continually the valve/s need replacing.
major problems....... if you fire up the boiler the pressure will increase, at 3 bar the PRV should opperate (will dump the excess pressure) much better to release the pressure by the drain valve or radiator air bleed.
if the PRV opperates and a the washer does not reset correctly the PRV pipe work will drip....... cold weather..... ices' up..........you get the idea

 

[majorevent]

remove the braided hose first, prove the valves are shut off or you could still be there next week if its letting by

 

[studips]

ditto the make up hose

the drain off should be at a low point on the pipwork (a brass hose tail and a square tap you can turn on or off with a small adjustable) - maybe near a rad, or if part of the system is on pipe drops, you ought to have one there.

i'd keep draining, and if the water stops, then you know you needle is stuck.

if it is at 3 bar and you try and use it, the pressure release valve will start venting

 

[andy978]

sound as if one of the filling loop valves have not shut off completely.

It appears this is the problem!

It's sorted now, thanks!

 

[andy978]

I found the valve and let out what seemed like galleons of water. I then went back to the boiler and notice the needle had dropped to around2, but slowly started going up.

I then checked on here, and majorevent suggested checking the inlet hose. It was slightly open, but couldn't be closed by hand. I got a pair of grips to tighten it closed. I have now released some more water and it's happily sitting at just over 1 bar.

Thanks to all.