Boiler low in pressure

[Sarahhh2]

Hi, my combi boiler is low in pressure. I want to increase the pressure but I’m not sure which valves to touch. When I open the blue one, I can hear the water in the pipe. If I touch the green one, you end up with no water coming through the taps to the sink or bath. I have no idea what the red one is… it’s not a valve to turn, it’s like a cap.

anyone have any idea how to increase the pressure looking at this?

Thanks x

If you turn the two black levers you should hear water filling into the system and the dial on your pressure gauge should move. To it up then turn both levers off again

...what happens if you leave the blue one open for 60 seconds, does the pressure increase (or do your feet get wet)?

Have you googled the make of boiler to find the manual online?

I have to do this whenever I top mine up as I can never remember which taps to turn.

Generally there is a valve on the boiler itself where you can raise the pressure. Presumably there is a model name on the boiler? User manuals are generally easy to find on the internet. I'd suggest you try finding one first.

Have you tried googling the boiler make and looking on YouTube? I had the same issue and in my case it was 2 blue levers that as I opened the pressure gauge came up.

Ignore the red one, nothing you can do with it, it is a check valve to stop polluted water from getting back into the drinking water. As others said, keep an eye on the pressure gauge gently open the blue valve and turn it off when the gauge reaches pressure, usually about 1 to 1.5 Bar. If it keeps losing pressure get a plumber in it could be a leak or failed pressurisatin vessel.