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From a regs point of view, is it acceptable to fit two single check valves in line instead of a double check valve? It was a royal pain in the butt to down tools to go and buy one when I thought I must have a double in amongst my clobber. Then to add insult to injury I ran out of reducers...

Guys, Can anybody tell me whether this a check valve on the fill loop. It's getting on 25 years old but still works fine. What are the ports for? One is capped TEST, would that be pressure test and, therefore, could I install a pressure gauge there as the pressure gauge currently resides on top...

Finally getting around to tidying up the yeehaw dog's dinner wiring of the central heating system left by installer some twenty four years ago! My question is whether each item/device/appliance is required to have its own independent isolation. CU has 16A MCB for the heating system. An FCU on...

Done fair amount of searching but not come across anybody asking similar question previously. Currently have a knackered window/sidelight in a timber frame beside a timber front door (in a timber frame, obviously). I need to replace the sidelight but was thinking of doing it in uPVC. I would...

Here's an interesting one - I think... I have a bathroom fan in zone 1 that was fitted decades ago which is getting near retirement. Obviously, I'd have to replace it with a SELV now but what are the regs pertaining to one of these?! Technically, the fan wouldn't be in zone1.

Guys, lots of questions regarding steel conduit inside the house carrying mains for the likes of showers etc. but do I require bonding (and if so, what sort - direct continuous to MET or cross bond to heating sufficient?) if: conduit is steel and runs on the outside of the building running...

A much discussed topic but even after a lot of reading I still have a question. It seems quite clear that bonding needs to be within 600mm - but there's conflicting info whether it's 600mm of the pipe entering the building or 600mm of the meter. Pic of both my gas entry point and meter...

Hello All! Been a lurker for a long time with zip all to contribute but finally need some help. I've done a fair amount of reading and searching on here, Google and IEE. I have a detached garage - less than a meter from the house. Although technically detached, it is joined to the house via a...