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Sorry if this has been covered but I cant find it if it has. I have a 9.5Kw shower. When I have a shower and touched the metal shower head or pipe I get a tingle. All the copper pipe work in the house is bonded to the consumer unit earth . This an old installation ,the water main into the...

Thanks Sam. Much appreciated. It looks like the hob valve (thermocoupled one) is part of a manifold with the four ring valves. Begining to look v. expensive! I can see why the cooker was thrown out now. Dave

Ok so you dont know. So why bother replying?

Im only asking how it works. If it 13 to 30 millivolts between the inner and the outer just say so. I will understand. If everbody has to do a course when they want to know how something works, whats the point of a forum? I would love to do a gas course, plumping course, plastering course...

Kev mv? Are you talking electrics? We might be talking about different things here. This is a 3mm copper tube with fat end that sits in the flame and the other end that goes into the gas valve is just flared out a little with a silver coloured middle and held in with a M8 nut. Where do I...

Cheers kevplumb, But these are the 'proper' junction thermocouples, not the copper tube thing Ive got. Dave

How can I test a thermocouple controlled 'gas valve' on a gas cooker . I've just ( over a month ago now) installed a second hand range cooker, and just cant get the hob to stay lit. i've tried a (two) new thermocouples , Universal ones from ebay £2 not the manafactures £30, but no joy. Im...