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The 2 gang switch was installed many years ago and the house has been fully tested by an electrician in recent years. I just want to swap around an existing light switch. I understand that can be done by a DIYer who is competent.

Sorry, I should have explained that I did not ask any electrician about this. I just wanted to know if I could swap around an existing 2 gang switch with a new one that replaced one of the switches with a key operated switch. Thanks for your advice.

Thanks, it is reassuring to know that they have been used like this elsewhere. It is for use in a shared house of 4 people, so it is difficult for me to ensure that the power is always on, because people turn off the switches in an attempt to turn off other internal lights. I don't want to...

I have an outdoor security light with a PIR sensor. I want the unit to have permanent power. It is switched from a 2 gang light inside the house on a one way circuit. One switch is for the kitchen internal light. The other switch is for the outdoor security light. People are in the habit of...

Hi. I have a problem with my valves letting by and this looks like a good solution. Just to be sure that I understand your instructions, do you mean to install a new standard combi straight filling loop such as this one https://www.screwfix.com/p/combi-straight-filling-loop/46605 but remove the...

I have a Vaillant ecoTEC plus 831, installed in 2010. I have a problem with both valves at either end of my internal filling loop letting by on this boiler. I think that capping off both valves will be the most simple solution. I think that the mains supply side requires a 1/2" cap. But I am not...

Thanks for the clear answer. So I understand that adding another RCD is possible, but not the best solution. Many thanks. I wasn't expecting such fast and good answers to this old thread! :)

Just some more background to my case (not the original poster), the reason for suggesting adding a RCD was to protect some existing lights and extraction fans in bath and shower-rooms around the house. I'm quite sure that these lights and fans were fitted when the house was built around the year...

Many thanks for the excellent answers and helpful photos. Please see the photo of my existing consumer unit. It seems to only have one busbar, so I can conclude that fitting 2 RCD's is impossible on this board? However it has been cut in 3 places, so it is in 4 pieces. 2017-10-14 16.01.38 by...

I'd like to know if another RCD can be added to this consumer unit. There is already one at the far right. Could one go in the gap towards the left too?

Can 2 RCD's be accommodated?

I also have a Memera 2000 AD. It already has one 80A 30 mA RCD protecting the circuits rated above 6 Amp. So just the 2 lighting and 1 smoke alarm circuits are not protected with an RCD. Each of the 3 is on a B6 Mcb. I have had an electrical test and been advised that the lighting circuits...

Sorry for the slow reply, I haven't checked this site for months. Thanks for identifying the taps, they seem to be very unique. The collar on mine does not spin around so I think that the pin is intact. I will ask a friend to try to dismantle our set of taps and if we cannot fix them, then I...

I am trying to troubleshoot a diverter valve that seems to be stuck, so I can only get water via the shower hose. I cannot get water through the bath taps. It is operated by moving a ring or collar. I have another one which works correctly and I think that I can hear a spring or something inside...

Bath taps showing collar (not sure about name) diverter valve.

Close-up of bath taps showing collar (not sure about name) diverter valve.

Unidentified diverter valve

My gas hob sparks continuously. I am aware that the button should be kept dry etc. But even if I remove the button unit from the plug in terminal, it continues to spark. I thought that it would be unable to spark without the button. Any suggestions as to the cause? Eg. Does it indicate a faulty...

An update on my post from 9 Jun 2015. I bought a replacement and installed it. But it still requires me to keep the button pressed for the length of time I want the water to flush. Perhaps it has always been like this and I never noticed. In the last few weeks my attention was drawn to it...

When I press the flush button on my Twyford toilet, the water only flushes whilst the button is pressed. If I release the button, the flush stops immediately rather than continue until the cistern has emptied. Hence I need to press and hold until it has emptied. I assume that this is a fault. It...