I've just had fitted a Worcester combi boiler to replace an existing combi
and is a sealed system.

The problem I've had is that the upstairs radiators constantly fill with air
that I purge only to reappear after a few days. This is causing the pressure
to increase in the system each time.

Can't find any leaks and I don't need to top up the water. Is there any type
of valve in the boiler that may let air in but not let water out?

Mezza

"Mezza" wrote in message
...
I've just had fitted a Worcester combi boiler to replace an existing combi
and is a sealed system.

The problem I've had is that the upstairs radiators constantly fill with
air
that I purge only to reappear after a few days. This is causing the
pressure
to increase in the system each time.

Can't find any leaks and I don't need to top up the water. Is there any
type
of valve in the boiler that may let air in but not let water out?

Mezza




Has the plastic cap been left on the auto air vent on the top of the boiler?
Mine had (12 years ago) and I had all sorts of problems.
Last year it blocked and I had hot water being expelled into the header tank
(it is not a sealed system)

I hope this might be a clue - but your boiler / set up will be different.


John

On Sun, 20 Feb 2005 09:48:22 +0000, Mezza wrote:

I've just had fitted a Worcester combi boiler to replace an existing combi
and is a sealed system.

The problem I've had is that the upstairs radiators constantly fill with air
that I purge only to reappear after a few days. This is causing the pressure
to increase in the system each time.

Can't find any leaks and I don't need to top up the water. Is there any type
of valve in the boiler that may let air in but not let water out?

Mezza


Test the 'air' for hydrogen gas. If it is then you have severe corrosion
taking place. If this happened after you did everything 'right' like
flushing out the system and adding corrosion inhibitor then this is bad
news. Otherwise it serves you right for skipping on the instructions. wry
smile

--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html

On Sun, 20 Feb 2005 21:53:26 +0000, Ed Sirett
wrote:

On Sun, 20 Feb 2005 09:48:22 +0000, Mezza wrote:

I've just had fitted a Worcester combi boiler to replace an existing combi
and is a sealed system.

The problem I've had is that the upstairs radiators constantly fill with air
that I purge only to reappear after a few days. This is causing the pressure
to increase in the system each time.

Can't find any leaks and I don't need to top up the water. Is there any type
of valve in the boiler that may let air in but not let water out?

Mezza


Test the 'air' for hydrogen gas. If it is then you have severe corrosion
taking place. If this happened after you did everything 'right' like
flushing out the system and adding corrosion inhibitor then this is bad
news. Otherwise it serves you right for skipping on the instructions. wry
smile

Test it how? Is it safe to put a match to it?

I've just had fitted a Worcester combi boiler to replace an existing
combi
and is a sealed system.

The problem I've had is that the upstairs radiators constantly fill with
air
that I purge only to reappear after a few days. This is causing the
pressure
to increase in the system each time.

Can't find any leaks and I don't need to top up the water. Is there any
type
of valve in the boiler that may let air in but not let water out?

Mezza


Test the 'air' for hydrogen gas. If it is then you have severe corrosion
taking place. If this happened after you did everything 'right' like
flushing out the system and adding corrosion inhibitor then this is bad
news. Otherwise it serves you right for skipping on the instructions. wry
smile

--
Ed Sirett - Property maintainer and registered gas fitter.

A corgi engineer fitted the boiler 2 weeks ago and did flush the system with
cleaner and added inhibitor. He is away at the moment and won't be back
until later this week. The house is 10 years old so no 'old' type pipes, can
you give me any advice?

Mezza

"Mezza" wrote in message news:...

I've just had fitted a Worcester combi boiler to replace an existing
combi
and is a sealed system.

The problem I've had is that the upstairs radiators constantly fill
with
air
that I purge only to reappear after a few days. This is causing the
pressure
to increase in the system each time.

Can't find any leaks and I don't need to top up the water. Is there
any
type
of valve in the boiler that may let air in but not let water out?

Mezza


Test the 'air' for hydrogen gas. If it is then you have severe
corrosion
taking place. If this happened after you did everything 'right' like
flushing out the system and adding corrosion inhibitor then this is bad
news. Otherwise it serves you right for skipping on the instructions.
wry
smile

--
Ed Sirett - Property maintainer and registered gas fitter.

A corgi engineer fitted the boiler 2 weeks ago and did flush the system
with
cleaner and added inhibitor. He is away at the moment and won't be back
until later this week. The house is 10 years old so no 'old' type pipes,
can
you give me any advice?

Mezza