Hi,
This my first post on your very useful website, so be kind!
I have just had a valliant ecotec 831 boiler installed and i have noticed that when cold water taps are turned off in the house (kitchen/downstairs toilet/upstairs bathroom) the boiler starts up, not for long, but then goes silent again.
From looking through the forums i have found similair issues. It sounds as though the cold water is being drawn away from the boiler, so the boiler's pressure/ flow sensor sees a change and starts doing something. People seem to suggest that a non-return check valve with a minature expansion vessel before the cold water inlet on the boiler should sort the issue.
That's fine, and i get that with the kitchen tap as it is approximately 2 metres away from the boiler, but will the upstairs taps also cause this to happen? Is the boiler sensor that sensitive?
Another theory is that dead legs can cause this to happen, becasue of trapped air? But i cant think logically if this sounds right? i have notice he has left a very long dead leg in the loft to the old header tank. Also i've notice an old galvanised pipe is also capped, which would have gone to the old galvanised tank.
My boiler instatller is trying to charge me for rectifying the issue, it seems to me like he should have checked this when testing the boiler and not left dead legs, which sounds like bad practice to me?!
Apologies for the war and peace, just trying to supply as much info as possible. Many thanks.
This my first post on your very useful website, so be kind!
I have just had a valliant ecotec 831 boiler installed and i have noticed that when cold water taps are turned off in the house (kitchen/downstairs toilet/upstairs bathroom) the boiler starts up, not for long, but then goes silent again.
From looking through the forums i have found similair issues. It sounds as though the cold water is being drawn away from the boiler, so the boiler's pressure/ flow sensor sees a change and starts doing something. People seem to suggest that a non-return check valve with a minature expansion vessel before the cold water inlet on the boiler should sort the issue.
That's fine, and i get that with the kitchen tap as it is approximately 2 metres away from the boiler, but will the upstairs taps also cause this to happen? Is the boiler sensor that sensitive?
Another theory is that dead legs can cause this to happen, becasue of trapped air? But i cant think logically if this sounds right? i have notice he has left a very long dead leg in the loft to the old header tank. Also i've notice an old galvanised pipe is also capped, which would have gone to the old galvanised tank.
My boiler instatller is trying to charge me for rectifying the issue, it seems to me like he should have checked this when testing the boiler and not left dead legs, which sounds like bad practice to me?!
Apologies for the war and peace, just trying to supply as much info as possible. Many thanks.
