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Can anyone throw some light on a buzzing solenoid on a Glowworm spacesaver kfb 40 gas valve, SIT830 tandem. It works ok but for the first five or ten minutes there is a loud buzzing from the solenoid then it fades a bit. It seems to be a resonance. Can anyone suggest a cause or solution? and...

question not so much about the mcb as the max Zs tables. In the on site guide, it's the blue one I've got, on page 89 it begins the max disconnection times/Zs values table, giving 0.4 and 5s tables. For bs3036, bs88, and bs1361 there are seperate tables(with seperate value) for 0.4 and 5...

I need a replacement pump (well just the head) for a vokera Maxin 24e, it's described as a grundfoss UPS 15-50 AO and the recommended price is £145ish+vat from vokera. I can get a Grundfoss UPS 15-50 (the only bit I'm not seeing is the AO) from B&Q for just over £50. Does anyone know if this...

does anyone know if these have a recommended lifetime? does the rubber ever perish or harden? or other deterioration take place? Any info would be helpful or even a pointer to a manufacturer of them so i could ask them direct. thanks

is there a set distance from a boiler before the copper (water) pipework can be continued in plastic?

I've got a new oven the book says it should be fitted to a 16a circuit. I don't have a cooker circuit in the kitchen, can I spur off the 32a ring circuit with a fused outlet, say 16-20A? Can you get fused outlets above 13A? and what cable should I use, 2.5mm? thanks for any help

I notice round pin plugs have the L + N reversed from the "normal" 3 pin plug, anyone know why this is so?

are 240v recessed halogen lights (no particular IP, fitting not sealed) above baths and showers (zone 2?) frowned on? not as per regs? really dodgy?

I fitted one of these a couple of months ago, customer phoned last week that it was faulty. Had a look, it would only power up the display from the battery, the mains had no effect as if it was dead. Fitted a new one and it was ok for two days, and then the same again. Phoned Horstmann, they...

As I understand it, if disconnection times are met, older consumer units with rewireable fuses are ok. I know mcbs are faster, but what other meaningful advantages are there?

Tested two of these, which were reported as not operating, across live and neutral = 6Kohms on one and around 60kohms on the other. Both ok to earth. I assume there is a thermostat, but if this was switched it would read Meg ohms I reckon. I would also think there may be a rheostat, but would...

I have some conifers which have outgrown a rockery, they are 8-9' tall(after 9 years). Is it likely they would survive moving, or should I accept that they will have to go?

Can anyone tell me if there is anything simple available for testing polarity on es and ses light fittings live?? I was thinking along the lines of a screw in unit which would indicate if polarity was correct