Hi All,

 

My mum's Worcester Bosch 4000 has a pressure leak. Pressure was fine for 14mths then was dropping from  1.3 bar to 1 bar every 9-12 weeks. Can't find any leaks anywhere on visible pipe work or radiators. What are the views on using a leak sealer to try to resolve this? 

Thanks 

Check radiators for air first - go around and bleed them all. If that doesn't fix and you can find no leaks.

 

Most possibly your expansion vessel has lost its pressure charge or has a leak. Had the issue a few years ago, faffed about in the end plumber changed expansion vessel issue went away.

We had this, leak sealer solved the problem. Did a flush and added inhibitor at the same time.