Boiler filling loop

It probably does have an internal filling loop, however that does not stop you having and additional traditional style loop elsewhere.

Brilliant, cheers John.

I have a Greenstar 24i which replaced a non-condensing boiler. It is fitted where the old boiler was. Rather than make a huge mess moving lots of pipes for the old traditional vented system with tank, the zone valve is its old place in the cupboard with the hot water tank. The CH header tank was removed and the filling loop is in the cupboard tapped into the rising water feed to the loft cold water tank. There's a loop and a remote pressure gauge along with 2 valves. It reads nearly the same as the gauge on the boiler. I treat the boiler gauge as gospel, read that and go and see what the other says and then add how ever much I want and check the relative change on the filling loop gauge.

Great, thanks.

You shouldn't need to keep topping it up. That water is coming out somewhere... ask the boiler fitter about it.

It could be something as simple as a bad expansion vessel.

Or a leak making your floor joists damp and rotten :(

Andy

Don't you think that with all the innovations in boilers and the considerable logic now possible at a relatively low cost, that they do not build in sensors that do the topping up automatically. This would also serve as a leak detector as if it needed topping up a lot there has to be a problem. Brian

This is currently exercising my mind:-)

Having drained and re-filled the primary loop recently, I have become aware that setting the system pressure exactly to that of the expansion vessel leads to alarming pressure drops as the entrained air slowly escapes via the auto bleed valves.

Stabilising now and I have stopped running round the house with a torch!

This must happen when plumbers do a system flush and re-fill from the mains.

In one of my houses in the past, I had a coal fire with a back boiler. Over the 20 odd years I was there, I never knew how the boiler got it's water supply, but it always served up nearly boiling water with no servicing.

Cliff Topp snipped-for-privacy@b.com wrote in news:roml8j$p1d$ snipped-for-privacy@dont-email.me:

I have just that for my WB in my loft. I have never used the integral one. I also have a magnaclean in the airing cupboard

"Brian Gaff \(Sofa\)" snipped-for-privacy@blueyonder.co.uk> wrote in news:roo5h1$7d9$ snipped-for-privacy@dont-email.me:

If th epressure gets low then the boiler shuts down and shows a fault. Surely better than it automatically topping up just under the treshold for a warning..

An older open vented system with a header tank will just keep topping itself up until you notice the leak. ;-)

Cliff Topp laid this down on his screen :

Thanks everybody ^^