We recently moved into a house which has a Vaillant combi boiler. We don't
have a manual for it but according to the wiring diagram stuck to the inside
cover it suggests that it might be a 242 or 282.
I had to bleed a radiator over the week-end & when I checked the pressure
dial this morning on the boiler I realised that it has dropped below the red
I understand that I can repressurise it using a filling loop. Can somebody
explain in idiot terms what this is ?
Is it a valve inside the boiler which needs opening until the pressure
reaches the desired level & then shut off again. If so whereabouts do I find
it ? I have asked Vaillant if they could send me a manual but obviously this
could take some time. Alternatively does anybody know if they are available
in .pdf format anywhere ?
The are two types of filling loop.
1. Internal to the boiler. These vary from make to make and usually involve
turning a big plastic key to open up the water supply. The key can usually
be found in your local landfill site, where the previous residents sent it
when they didn't realise what it was. I don't know if the Vaillants are like
2. External to the boiler. These consist of a number of valves connecting
the water main to the system. It should include a braided flexible hose.
This hose should be disconnected, but rarely is. You connect the hose up and
open the valves (sometimes 2, sometimes 1) until the pressure is high
enough. Then turn off all the valves and disconnect the loop.
On Wed, 05 Nov 2003 14:37:57 +0000, Christian McArdle wrote:
The FAQ says just about everything you need to know - and a stack more.
The OP likely has a VCW 242 (2 big white stove enammeled doors - grey
This boiler has an external filling loop (somewhere).
Modern Vaillants (Turbomax+ ) have an internal valve which can be
operated with a small metal key or a screwdriver. More recent models have
two valves earlier ones had just one.
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at www.diyfaq.org.uk
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