John, Get the fitter to look at your system straight away! It is definitely leaking, it shouldn't lose pressure at all. Wherever it is leaking, it will be causing damage, and if you keep topping up, the corrosion inhibitor will be non existent, which naturally will result in corrosion in the system and it's early demise. If you know the leak is from the "System" and not the boiler itself, then a plumber will suffice. Otherwise if the boiler is leaking, then I recommend contacting Ideal, and have them recommend an engineer in your area. You might also ask Ideal, if there have been any design changes to your model of boiler, as if there have, you may have them fitted for free. HTH Dave 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 ******************************************************************** This email and any attachments are confidential to the intended recipient and may also be privileged. If you are not the intended recipient please delete it from your system and notify the sender. You should not copy it or use it for any purpose nor disclose or distribute its contents to any other person. ******************************************************************** ** 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