System boiler pressure.

westy23

I had a new Bosch system boiler installed last April along with a new cylinder and radiators and needed to top the pressure up 3 times over a 6 month period as it was losing about half a bar every couple of months, was told by the installer it was normal as the system has a auto air vent and it would settle down eventually once all the air had been purged.
Now with the heating on it needs topping up again. .
No obvious leak anywhere (yet)
Have I been given a load of flannel?
Posh way of saying bulshit.

boliston

Half a bar every couple of months is quite a small top up.

missile

My CH needs similar

JohnB47

westy23 wrote: »

I had a new Bosch system boiler installed last April along with a new cylinder and radiators and needed to top the pressure up 3 times over a 6 month period as it was losing about half a bar every couple of months, was told by the installer it was normal as the system has a auto air vent and it would settle down eventually once all the air had been purged.
Now with the heating on it needs topping up again. .
No obvious leak anywhere (yet)
Have I been given a load of flannel?
Posh way of saying bulshit.

Just to clarify. My pressure gauge is an analogue dial, calibrated in bars of pressure in tenths of a bar increments. My pressure is normally set to 1.5 bar.

When you say your system loses half a bar every couple of months do you mean 0.5 bar (ie from, say, 1.5 bar to 1 bar)? If so, that seems a bit much to my inexpert eye. But if you mean it loses half of a tenth of a bar, that's nothing to worry about.

keith969

I wouldn't worry about it unless it got worse, a top up every couple of months is not a huge inconvenience.

westy23

Yes 0.5 bar drop per month approximately.

JohnB47

westy23 wrote: »

Yes 0.5 bar drop per month approximately.

Well, actual experts will comment soon I hope but 0.5 bar loss per month is not good in my books.

manda1205

I'm sure I remember topping up ours a lot in the first year we had ours put in. (We also have a Worcester) And also having to bleed the last radiator a lot too. It settled down after that and now I hardly ever top it up.