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    Cable size for two ovens and a hob from extension CU with 6mm supply

    Hello Later this year I plan to get a new kitchen. I currently have a gas oven and hob but was wondering about the viability of electric. The kitchen is in an extension that has a bedroom/en suite above. There’s s a 6mm supply cable (max 20m) from the main consumer unit to another CU in the...
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    Slope of bath waste into soil stack too steep?

    Hello I'm adding a 50mm waste from a bath/basin into a soil stack, which already has two separate shower wastes connected. The only available position for a boss strap would mean a 19cm drop over a 107cm run. I can see the regs say this is too steep, but adding a vertical drop to get a...
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    Do basin fixing kits work?

    Hello. I have a wall hung basin for an en suite and have bought a Rawlplug fixing kit (140mm x 10mm bolt). It’ll be going through tile, tile backerboard and into timber. I would have got the Fischer kit but it had a couple of negative reviews. I don’t plan to sit on it but do these kits...
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    Do you include the vertical run when deciding waste pipe diameter size?

    Hello I’m wondering if I’ve made a mistake here. I’ve got a 40mm shower waste outlet which runs less than a metre horizontally before it drops vertically for 2.5m, then goes outside for a further 2m horizontal run to the soil stack. I see regs say anything over 3m should be 50mm but does that...
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    Joining 1.5mm cable to 2.5mm?

    So in tacking the job in my other post, I’m wondering if I could potentially solve another problem. The garden shed, garage and outdoor light no longer work and the faulty cable was taken out of the CU. New 1.5mm armoured cable has already been run from the shed to the house but to get it to...
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    Cable and insulation

    Hello I want to put some rolls of insulation in the ceiling void between the kitchen and the bedroom above, primarily to dampen the clatter in the kitchen. The lighting cable is currently lying loose. What is the best way to ensure the cable won’t overheat. At some point the kitchen will...
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    New flush valve handle/ too tight / too loose/ not springing back

    Hello I’ve just had to fit a replacement flush valve on a toilet with a lever handle. Previously it had a mechanical arm but this is a dual flush valve with a cable. When I hand tighten the inside nut towards the handle, it’s too tight to flush, when I loosen it, it wobbles. Either way...
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    Ventilation of chimney cavity - how?

    Hello. Years ago, to make way for a loft conversion, an internal chimney stack/breast was removed and taken down to the floor level of the loft. There’s no ventilation at the top nor in the bedroom it passes through. On the ground floor room is an unused fireplace that I’d now like to block...
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    Cabling for motorised valves

    Hello Hopefully this is not one for the plumbing forum. In the future I may add an indirect hot water cylinder and zones to my central heating using motorised valves so want to be sure the cabling is in place. Given the layout of the pipework the valves would be at the branches and not the...
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    Partial upgrade from 15mm to 22mm / motorised valve

    Hello Following on from the advice I've had previously as regards inadequate 15mm CH pipework (thank you), I've now got as far as I can go with 22mm on the downstairs run. Luckily there was some 22mm copper in place partway through an area below a tiled floor, but it drops to 15mm where I...
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    Radiator diagrams - where can 22mm change to 15mm?

    Hello Am starting a new thread as, based on the advice I got (thank you), I need to upgrade my central heating pipework from 15mm to 22mm. I'm hoping to find out how much of it can stay and how much of it needs changing. In total there are 21 radiators totalling 23 Kw, across three floors...
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    35kW combi, 15mm CH pipes, 22kW rads - problem?

    I’m feeling despondent so please go easy on me. I’ve swapped 15mm hot and cold pipes for 22mm and where I could get access replaced the old 15mm CH pipe with new 15mm Hep20. I’ve got a 35kw combi boiler that feeds a 5 bed house including loft conversion. There’s a main bathroom with separate...
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    Side lamps controlled by ‘light switch’?

    Just an idle thought… In an ideal world I’d like the side lamps in my living room (which are plugged into the double sockets) to come on via a switch as you enter the room i.e. same as how you control the overhead light. (I rarely have the overhead one on.) A fused spur would look awful but...
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    Replace red and black 10mm cable to loft conversion?

    Hello I’m doing some renovation and I have a loft conversion which has its own small CU for its light and sockets. It’s fed by a 10mm cable from the main CU on its own RCBO. However it’s black and red and I wondered whether it’s considered old. I obviously won’t be attaching it, but I could...
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    Gardz thick streaks

    So I brush painted a new, dry bare plaster wall with Gardz. I started part way through one tin and as I got to the end I realised it was a thicker consistency. I obviously didn’t stir it properly. So now I have a wall with some thick steaks of Gardz. Should I sand it or will it the paint...
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    Pipework for adding unvented cylinder to combi

    Hello I’m working on adding a couple of en suite showers but currently have a combi boiler which I fear won’t be adequate for the increased demand. From what I’ve read it seems I might need an indirect hot water cylinder. Am I right in thinking a cold mains feed into it is heated by a coil...
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    Quality of base coat?

    Hello I’ve had a lot of plastering done and I want to make sure I get the painting right. I plan to use Johnstones Perfect Matt colour as the top coat but was going to use a matt white mist and undercoat first. Should the base coats be the same brand or at least a good quality paint (and...
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    Thermal rolls to help with sound insulation?

    Hi I’ve got some Knauf 44 thermal insulation rolls left over and I know they don’t have acoustic properties but is there any point in putting it in the void between the kitchen and the bedroom to help absorb the sound of clattering pots and pans? It’s a deep void so even doubling up the...
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    How much ventilation under floor is enough?

    Hello I've currently got some floorboards up in a ground floor utility room room which wasn't previously heated but soon will be. In the external cavity wall there's an air brick to the outside. I can't see from the inside but I can stretch towards it and feel a draught so I assume it's...
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    12.5 tiles high, how to cut.

    Hi Need some advice please. The wall height in the shower area, taking account of the floor tile, is 253cm. It's a level shower and the plan is to drop the tiling to approx 5 tiles high in the non wet area. The tile height is 20cm so taking account of the grout (2-3mm?) it'd be approx...
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