Hi there - am hoping someone can answer this. The boiler seems to be working ok and has been for the 6 years it has been in. I keep the pressure topped up between 1 and 2.5 bar but recently I have noticed that it makes a "cascading water sound" whenever I run the hot tap in the kitchen (which last for another 10-20 seconds after I switch the tap off). I'm pretty sure it never used to do that. Does anyone have any ideas what might be causing this?

Don, January 2008

u could have air in the system try turning the screw head on your pump and lettin the air out of the pump.

jm, April 2009

Many boiler Installation & Commissioning manuals have fault finding charts so you could try looking in your manual. If you do not have a manual for that boiler try www.gotoplumbing.co.uk which has 1000's of downloadable manuals.

helping hand, February 2008

I fit baxi's all day long! because of reliability. your problem , without fault finding in person seems to be a build up of scale deposits etc in the domestic hot water heat exchanger. is your area a hard water area?

Chilli Heating,Teesside, January 2008