Blimey, I'm not doing that
Think I'll have to call an engineer![]()
Maintaining the pressure in a combi central heating system isn't really an engineer task - you should feel competent to do it. All you have to do is turn a little tap, and watch the pressure gauge. Nothing catastrophic will happen if you get it wrong, but if you overdo it it can trip the overpressure vent in the boiler, which may cost a bit of money to replace.
You shouldn't need to call out the plumber every time your system pressure gets low, really. But if it happens every couple of weeks (allowing for the fact that your new system will need to bed in for a little while), you may want to call someone in in case there's a leak.
ETA: OK, so now I see that the story's moved on a bit...including a leak, hem hem hem.
Fingers crossed, Minnie - I hope they get this sorted ASAP. To plumb in a boiler backwards...now that's really, really stupid. I hope the plumber gets ridiculed endlessly by his colleagues for being so stupid.




