John Brown's latest activity

The expansion vessel in question is attached to the central heating(radiators) and the indirect heating coil in the hot water cylinder.

You may not have read the entire thread. I can't get any air into the expansion vessel at all. I have opened, and in fact totally...

Interesting, thanks. I hope to borrow a Makita cordless inflater from a friend in the village, not sure if that'll help, but certainly...

Yes, but the pressure of the water concentrated onto the pin at the back of the valve..?

I'm still thinking about this - I think the problem might be that the diaphragm is pressing on the back end of the valve. I may try and...

No pressure entails a total drain down, as the expansion vessel is on the ground floor, and there are 8 or 9 rads upstairs. As I said, I...

I took the valve core out - zero water, but if I poke a matchstick up the valve outer, I can feel a springy resistance, which I guess is...

It's a Frankenstein boiler. Vaillant Eco Max combi, but the hot water side blanked off, so it's running as a system boiler. This was...

I should have mentioned that this is an external expansion vessel, so I'm not sure the boiler tails will help with isolation.

I'll take a closer look, see if I can find an isolator valve. It's a horrible installation, giant water tank with bad access to pipework...

+1 for citric acid.

I have spare valves and the removal tool, so will maybe try the "loosen it a little" thing.

I decided that the expansion vessel on my CH system could use a bit of pumping, as the water pressure in the system swings wildly from...

You're table saw will handle a 150mm cut? It must be a big one... Even my little Inca bandsaw will just about manage a log that size...

I know this is not answering your question, but when I sold a shed on FB marketplace 5 years ago, the guys that took it away used a...