Too Much Pressure In My Boiler

[Ric.ror]

Okay the pressure gauge was on zero so I've re- pressured it but it's gone to 2!
I cannot bleed the radiator as I don't have any tools
I haven't turned the power back on yet but will it be okay at two?
It's not in the red area

[donny48]

There should be a pressure release on your boiler piped to waste. Why was it on zero ?

[Hopkirk]

Bleeding air would surely make no difference.

If it isn't in the red, why are you worrying?

[Ric.ror]

Because it has not been used for at least six months
Where would I find the pressure release

[frugalfred]

Is there a pipe leading to the outside of your property, cos if it's a Worcester-Bosch boiler any excess water will be discharged through same? My engineer serviced mine recently and said 1.5 was about right. I had pressurised it to 2.

[donny48]

Bleeding air would make a difference by creating more "space" for the water and therefore dropping the pressure.

[Ric.ror]

Because on the YouTube video I looked at the guy said repressive up to 1.5 - if you go over release some pressure from the radiators but I don't have s key for the radiator at the moment

[Hopkirk]

I'm not convinced, Donny.

[Ric.ror]

I'm in a first floor flat frugal fred

[donny48]

Most boilers are ok up to 1.5. they generally alarm at 2 and will stop if it gets much higher.

[Ric.ror]

Will it be ok to use at 2?
It's a Worcester Bosch BTW

[Ric.ror]

What do you mean by 'alarm'?
Will it just go off?

[donny48]

If you look at the bottom of your boiler there should be a hose fitting for the excess water, put a bucket under it the amount of water will not be great. What boiler , have you got manual if not you can generally find them on-line.

[Ric.ror]

Can I put the power back on?

[donny48]

It is unsafe at 2 but you may get away with it. There is a flexible bag to allow expansion when water gets hot, you will now have expanded it to a larger degree than usual.

[donny48]

The problem now will be that you have taken up a lot of the space in the expansion chamber, when you heat the water it will expand and require more space, after that I don't know if it will cope with it or not.

[Ric.ror]

I won't turn it back on the

Can I just say thank you all for your replies
If I was a little curt in my responses it just how worried I was
I'll leave it this evening and consult a professional tomorrow

Again - many thanks

[donny48]

Hopkirk , you may not be convinced but it is a law of physics, if you give a pressurised liquid more room you will drop the pressure. You would after venting some air start venting water.

[Baldric]

//I'm not convinced, Donny.///

Donny is correct, if I over pressure a system I lower that pressure by bleeding the Utility radiator, into a jug if needed, and keeping an eye on the gauge until it's correct.

[donny48]

You could try switching the power on to the boiler without the heating and see if it alarms.

[melv16]

Remove the excess water pressure out of the system by opening a bleed nipple on one of the radiators. That's how plumbers do it.
You won't have damaged the system by over filling it, that's why there's a safety valve on the boiler.