pressure on combi boiler at highest!

southcoastrgi

turn the heating off for an hour or so, does the pressure rise ? if it does it's the filling loop, run the hot water does it rise ? if it only rises when the heating is on then it's the expansion vessel, it either has failed or it needs re-pressurising as I've already said

rothchick

Here are some pics Can't believe how dusty it is under the boiler!

I had the boiler serviced in August. It gets a service every year.

rothchick

southcoastrgi wrote: »

turn the heating off for an hour or so, does the pressure rise ? if it does it's the filling loop, run the hot water does it rise ? if it only rises when the heating is on then it's the expansion vessel, it either has failed or it needs re-pressurising as I've already said

I'm slightly worried about switching it on. Its been off since 7pm last night apart from hot water use last night and this morning prior to me noticing the leak and pressure problem. Haven't had it fired up since as I don't want to make the problem worse

thanks again everyone for your input. I will be very keen to see what the plumber says tomorrow and hopefully he/she won't try to rip us off!

Myser

Your photos are very small so it's difficult to make out the piping configuration.

On your first photo, you show one of the valves for the filling loop. It is difficult to see the pressure reading on the photo of the gauge.

The flexible pipe should be removed after filling the system. Usually, the black levers horizontal to the valve body indicate that the valve is off.

If after removing the flexible pipe, water continues to drip out of the valves, then you need to replace them.

As others have said, check that the valves have been fully shut off by pushing them in the off (horizontal) position.

The filling loop isn't usually tested as part of an annual service.

rothchick

Sorry, I didn't know how to make the pictures bigger. they were a lot clearer on my phone!

I rebled my radiators 2 hours ago to bring the pressure to 1 (in green zone) and it hasn't moved since and the leak outside has stopped (it was all over my side wall and car port roof too). My heating is still off and I haven't used any hot water -thank god for my electric shower!. I've had to change the plumber visit to Tuesday so tomorrow I will try to put the heating on and will watch what happens to the pressure.

I am slightly concerned that I was never advised to remove the filling loop I have no idea how I would go about this without causing damage! I worry way too much. I've had the boiler serviced annually by Alpha Engineers until recently. It was fitted 12 years ago by a local plumber and he just told me to turn the black dial if the pressure got to low.

Maybe this link will show the pic better

https://picasaweb.google.com/lh/photo/ie_JpOvh7cJj-T2vxl51y9MTjNZETYmyPJy0liipFm0?feat=directlink

Thanks again, I will update once I have seen the plumber

I_have_spoken

Once the valves are closed, you should remove the filler tube using the twist grip -

Myser

Before removing the filling loop flexi pipe, check what the other side is connected to first.

If it is another valve, that will also need to be shut off before removing the flexi pipe.

rothchick

Myser wrote: »

Before removing the filling loop flexi pipe, check what the other side is connected to first.

If it is another valve, that will also need to be shut off before removing the flexi pipe.

I'll ask the plumber, wouldn't have a clue how to do this and the boiler is quite low to the ground in the bathroom so not easy access at all!

rothchick

Quick update:

I fixed the problem myself. It must have been pressure leaking into boiler but I just couldn't hear it.

I bled all my radiators the night before I had the plumber coming . I then upped the pressure slightly on the boiler and made sure it was switched off correctly before putting the boiler on . I put the heating on and the pressure hasn't gone above the green area since.

Cancelled plumber visit.

Thanks again for everyone's responses. I will check with the plumber about the flexi pipe removal next time I have him out