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Can I ask what is the danger? Thank you

Update, this borrowed neutral is a spur from the nearest socket to this wall light, if I got an electrician to move the lighting circuit onto the same rcd as the house sockets, would this solve the issue?

Would this happen if the neutral set in the wall is coming from a socket on the ring main which is on the other rcd?

Yes it’s a new consumer unit installed in a house we bought by previous owners, my dad was an electrician many years ago so he checked the neutrals on the board

All neutrals on the correct bars, looking at previous threads it looks like that neutral in the wall is probably the issue

I have consumer unit with 2 rcd circuits Please see rather crude drawing. When I switch the second switch on it trips both rcd,s if there is no bulb in it doesn’t trip and also if I put a tester across the bulb holder that lights but doesn’t trip. Why does it trip both circuits? The neutral...

Sorted by excellent Viessmann engineer who came out next day and changed the faulty fan

Hi,just installed a vitodens 050 I forgot to purge the gas line first and not sure whether that affected it but it would not complete the flue gas test see error codes. Purged the pipes but now it’s telling me “test already done “ and then when I try to re commission it throws up same error...

My ch boiler is 40 years old my multi point is 25, my gas bills are 30% higher than average for my house I need an upgrade, thanks for everyone’s advice I have taken it all on board and will not be putting mains pressure to flush it, and am carefully considering my options. Thank you

Yes, getting rid of the 25 year old multi point as well, no worries about the plumbing, I’ve done a lot. When you say “mains pressure” The boilers must have a governor to regulate the pressure going through the system as no mains pressure is the same. If it finds leaks I’ll fix it, no...

Ha, yes I thought that as I wrote it ‘I’ve ad this brush for 20 years” Tank has a good concentration of inhibitor and topped up

I am having my 40 year old free standing boiler replaced with a new combi. This system was installed using fernox inhibitor from new and no work has ever been done on the water side and so it is the same water as at the start. (Apart from top up for bleeding) It is a heating only boiler with an...

Ah, my apologies I see what you mean now, that that is literally a ring of ptfe. I thought there was a gap in the thread but maybe not. The top one is a pressure gauge and the bottom one is a fill adapter, both off a new boiler.

I know my photos are bad but you may need to have a closer look

Could you tell me if these fittings in the photo require ptfe tape or paste on any part of the thread as they have a rubber washer within the thread so I assume not. Thank you

The efficiency of my old boiler is very poor and gas costs seem high, I have a complete set of gas valve spares in the loft for the Mexico Flow rate from my multipoint is 6l per min (rain shower works well) 25kw says 10 and the 30 says 12 so a lot better

Yes I am thinking the same

my boiler is over 40 years old, ideal Mexico floor standing and a Medway multi point for hot water, so time for a change!, so a Viessmann 050 25kw would be well big enough then?, on offer atm under a grand with flue at city plumbing. House is a 1930,s medium semi, 9 rads 1 bathroom

Looking at replacing an old boiler with a new combi, all the calculators say 24kw to 27kw for my house but is this the advertised size or the one for the central heating as when you delve into the specs of say a Viessmann 050 30kw the water is 30kw but the ch is 25kw so do I take the latter as...

Thanks I actually meant was it ok to have joints in the cable in the surface mounted pattress box behind the switch instead of having to run cables from yet another junction box to the switch not the type of connection