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A customer has had a new electric central heating boiler installed and wants me to wire it up. The customer has already got the time programmer but the plumber has told the customer that I'll need to use a relay as well. For those of you who regularly do CH wiring, is a relay a plumbers term...

I've finally traced an intermittent fault in a customer's heating system to a broken valve. I only want to replace the head mechanism, not the whole valve. Do they have a standard fixing arrangement? The system has one Honeywell valve but the broken valve is from Sunvic. Is it possible to...

Client wants to replace their kitchen. The house currently has a 4 way rewireable fuse box (lights, ring, cooker, immersion heater). The customer understands that this needs upgrading and is happy for a CU replacement. However, they are not happy to have a rewire. The general condition of the...

I've got a shower head similar to the one shown at this address --> http://www.bathroomstuff.co.uk/product188.html When it was first installed a few years ago the water came down in a straight flow, ie a vertical column of water. Since then I've needed to descale it a few times. Sometimes...

Customer has a new meter and isolator installed about 10 meters from his CU. I need to connect the isolator to the CU and will use a length of SWA. I'm leaning towards using 3 core SWA so I can use one of the cores to connect to the MET. However, is there any reason why I couldn't use 2-core...

A friend's cooker element blew and tripped their main 100mA Type S RCD (it's a TT system) but the 30mA before it didn't trip. I would have expected the 30mA to go first thus saving the 100mA from bothering with it. Am I missing something here?

A customer wants to add a spured socket to an existing ring final. The CU has MCBs with no RCD protection and no spare ways. There's no way they'll go for a CU change just for one socket and I very much doubt that adding a socket with built-in RCD is good enough to conform to Regs. How would...

Got a CU with RCD protection on upstairs, downstairs and kitchen ring finals. No RCD protection on upstairs and downstairs lights, immersion heater, or cooker. The cooker switch contains a socket outlet. Presumably I need to move the cooker MCB to the RCD side of the board? Thanks.

My WD61 has stopped filling with water via the main soap chamber and uses the much smaller chamber to the left. This is a recent thing as it's always filled from the main one before. This is stopping the soap from getting in to the wash. I've had the top off and can see no blockages in any of...