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    Single Pipe Central Heating - lockshield valves necessary?

    Earlier this year I had some questions about my CH (I moved to this property last year) which was not working on all rads. The original post was here //www.diynot.com/forums/viewtopic.php?t=209351 and I had some helpful comments from stem. I'm just about to do the work. It is mixed 2...
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    Electrical Test screwdriver mystery

    Here's an odd one for you older and wiser electricians out there: Was in the loft having pulled a disused supply to the garage back into the attic. Used a test screwdriver to test it for live & not live before moving it, and again not live & live once it had been brought into the loft to...
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    Add RCD to part of Split Load CU/Isolation Switch

    My CU is a Legrand Split Load board with 100A DP Main Switch (2 module wide) feeding 5 Unprotected MCBs 80A DP RCD (2 module wide) feeding 5 Protected MCBs. Wanting to improve protection, I had hoped that the 5 unprotected MCBs could be replaced with single module RCBOs but no such luck -...
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    RCBO sufficient for sub-circuits or is RCD also needed?

    Moved here last year, adjacent to the main Consumer Unit there is a later Sub-board mini-CU which has a Protek RCBO 40/30B which gives protection to 2 feeds: Feed 1 direct to internal study where there is another mini-CU with isolation switch and 32A mcb protecting computer sockets. Feed 2...
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    2 cold radiators

    Moved in during the summer, now the CH is getting used have found that 2 rads out of 10 are cold. System - is fully pumped single pipe (3/4" or 22mm) in older part of house, or twin pipe 15mm in new part. All rads have TRVs apart from the towel rails. Combi boiler ca 8 years old therefore...
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