Hi John, You should only need to adjust the pressure about once or twice a year. Note though you will only need a very small leak in order to drop the pressure each 4 weeks. Rad valves seem to be the most likely place to look. On 8 Apr 2008 at 16:03, John Wilson wrote: > Hello All, > > Sorry for the O/T posting but I'm sure that some people on > here will be able to compare notes and give valuable > feedback. > > I have had an Ideal Isar combi-boiler now for a year and am > of the opinion that the pipework may be leaking under the > downstairs floor boards. Other people I have spoken to (but > with different boilers) tell me that they rarely, if ever, > have to top up the pressure in their central heating system. > However, I find that I have to do this every three or four > weeks. The pressure will have fallen from the recommended > 1.5 bars to only 0.5 bars or even lower, causing the boiler > to become noisy with a vibrating effect. > > Does anyone else find this to be the case with these boilers > and systems? I am about to report it to the fitters but > wanted to know what the norm for the frequency of pressure > top up of these systems is firstly from any other users. > > All contributions appreciated. > > John. > > ** To leave the list, click on the immediately-following link:- > ** [mailto:access-uk-request@xxxxxxxxxxxxx?subject=unsubscribe] > ** If this link doesn't work then send a message to: > ** access-uk-request@xxxxxxxxxxxxx > ** and in the Subject line type > ** unsubscribe > ** For other list commands such as vacation mode, click on the > ** immediately-following link:- > ** [mailto:access-uk-request@xxxxxxxxxxxxx?subject=faq] > ** or send a message, to > ** access-uk-request@xxxxxxxxxxxxx with the Subject:- faq > > > __________ NOD32 3010 (20080408) Information __________ > > This message was checked by NOD32 antivirus system. > http://www.eset.com > > ** To leave the list, click on the immediately-following link:- ** [mailto:access-uk-request@xxxxxxxxxxxxx?subject=unsubscribe] ** If this link doesn't work then send a message to: ** access-uk-request@xxxxxxxxxxxxx ** and in the Subject line type ** unsubscribe ** For other list commands such as vacation mode, click on the ** immediately-following link:- ** [mailto:access-uk-request@xxxxxxxxxxxxx?subject=faq] ** or send a message, to ** access-uk-request@xxxxxxxxxxxxx with the Subject:- faq