Hi - new to this forum so be gentle. I know it's been asked loads of times but I'm getting a bit cheesed off and need some new input.
We recently had a new Bosch Worcester greenstar 42CDI boiler fitted. After it was comissioned, the fitter told me we may need to re-pressurise the system a few times after bleeding the rads to get all the air out of the system. After a month, we are still losing pressure - takes about 24 hours to lose the lot.
Immediate thought was a leak, although we haven't changed/altered anything except had new boiler fitted.
No visible evidence of any leaks. I have concrete floor so all ground floor piping is surface mounted. Upstairs - no discolouration of wall/ceiling, damp carpet - not a sausage!. What troubles me is that it takes quite a tidy amount of time to refill the system so where is all the water going?
Have also had a bottle on the venting pipe outside for 24 hours - nothing.
[quote="htg engineer"]Check the condensate discharge - sometimes the secondary heat-ex can split and the water is lost this way.
But - i'd put money on it being a leak. It doesn't take much of a leak to lose the system pressure.
Thanks htg - pity you're not a betting man :P
I got the installer to come back again and he put some stuff in the system that seals small leaks - worth a try as we didn't want to go down the chip board floor route :shock: . Anyhow, for others who suffer the same problem, this seems to have done the trick. We have had no pressure loss for 3 days 8)
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