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    Electric underfloor heating under laminate

    Hi. Simple enough question. I have to put an electric underfloor mat in under a laminate floor. Question is, does it go under or over the underlay which goes under the laminate? Thanks
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    Cladding steels

    Hi. I have steels in my new build, vertical and horizontal, bolted together, and in an external wall. Within the oblong shapes in the steels are large windows. I want to box in the steels, in timber, to finish with the windows surrounded by a box construction. I have been told that I need to...
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    Painting bathroom on new plaster

    Just that, really. We have a newly plastered, new build bathroom, so plaster over plasterboard. In the past I've bought, and used, emulsion for kitchens and bathrooms. My question is, is this worth doing? Is it very different from 'ordinary' emulsion? Would/do professionals use this, or is it...
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    Wiring query, fixing inside light unit

    Hi. I have 2 identical wall light units: https://solislux.eu/en/product/wall-lamp-ceramic-sigma-mini-sl-0229/ They're nice looking units but come with no instructions at all as to wiring, and the bulb holders are not anything I recognise. They look like this: And the connection at the...
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    Fixing timber pieces to standard new mdf floor

    I have a number of salvaged pieces of tongue and grooved floor, mainly around 30cm in length, which I am planning to reconstitute into a floor. I'm planning to cut them all, either to the same lengths, or not, and basically lay a tongue and groove patchwork, glued at the cut ends, and in a...
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    Does an AAV have to be 100mm?

    Hi. I have the following: Toilet, sink and shower on ground floor to below floor waste 110mm from the toilet running up a corner in the ground floor to: toilet, sink and shower on the first floor. There is no roof vent, so I want to use an AAV on the first floor. Do I have to use one as big...
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    Relay question

    OK. Next in the ongoing saga of plumbing in our MVHR system. I have the following issue. We are installing an MVHR system, which has a low/med/high fan speed run by a remote, wired in switch. All fine, and I asked before how to wire it in, and am doing so with a .75mm yy cable. BUT... I'd like...
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    YY cable size

    Hi. I'm wiring in an MVHR unit, and raised a thread here https://www.diynot.com/diy/threads/wiring-in-an-mvhr-unit.561685/ about it. I was suggested YY cable. The power requirement is shown in red, here By my calculations, I'm needing less than 1 amp, so 1mm cable would work, but I'd run...
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    Wiring in an MVHR unit

    I'm wiring in an MVHR unit. I'm doing a lot of wiring on a house build myself, to be signed off later. So, I have this wiring diagram: My query is, apart from the L/N/E in, the rest is from the controller to the unit. So there are a number of wires running between them. Presumably, there's no...
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    Blocked outlet on cistern

    I have a fairly new secondhand toilet I'm going to install. Looking inside the cistern, though, I see this: It seems the overflow has been masticked closed. A bit weird. If I unblock it, am I likely to have problems? My guess is that for some reason the cistern water level is somehow set...
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    Remedial trap for a shower

    I have a shower tray with an outlet which runs pretty well straight out to a 40mm outlet then to a waste pipe. I thought the outlet had a trap in it, but it doesn't, and we are getting occasional drain smells, (and occasionally worse...) through the waste. The piping is still accessible, and...
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    Underfloor heating query

    Hi. I'm new to underfloor heating, and this may be a silly question, so sorry in advance if it is. We had an underfloor system put in before laying a concrete floor. Baxi boiler now installed, and now the manifold, pump, and all the gubbins are wired in. There are three zones; zone 1 has one...
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    Wiring in underfloor heating - Heatmiser UH4

    I'm wiring in a wet underfloor system already laid under concrete, to connect to a new Baxi combi. All good, except that the wiring instructions for the Heatmiser UH4 are a scant. I've worked out the thermostats, actuators, mains in, and ufh pump. The plumber put in a Honeywell 2 port motorised...
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    Wiring in a combo boiler

    I'm doing the wiring in a new build to be Part P tested afterwards. We're having a Baxi combo boiler installed. The wiring says it needs to be "3amp 230v 50Hz supply control using cable of 3 core .75mm 3183Y multiple flexible type" Plan is to run a separate supply off the consumer unit to a...
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    Construction Phase Health and Safety Plan

    Hi. We're struggling with HSE. We have a Principal Designer who, it turns out, is a jobbing builder who has dome a number of attics and contracted for other PDs but never done a full PD role himself. HSE have become involved. They want a Construction Phase Health and Safety Plan, he hasn't done...
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    Triton electric shower - compression won't compress

    I have a Triton shower to plumb in. Water and electrics are ready to attach, but the manual says use a compression joint. Two questions? The manual says nothing about needing a copper pipe, but as I remember you sometimes are required to connect copper pipe rather than plastic If I use a...
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    Adding an rcbo into a consumer unit.

    I have a (yes, currently very messy) consumer unit. It's a standard BG dual RCD unit. I want to put a single rcbo in for an electric shower. If you look at the picture there's a busbar across the 6 rcbs to the RCD in each case. I want to put in an rcbo. I think I shouldn't use the busbar...
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    Grey water to waste pipe too high, all above ground level

    I am making a shower room in a new build but all waste is above ground. If you look at the pictures, there's already a toilet and 110mm in place, with a sink waste about 2 metres away running into it. About 2 metres further away than the sink, and joining into the sink waste, there will be a...
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    Bulbs keep blowing - and tripping mains

    Hi. I live in a 100 year old house, rewired 15 years ago. In the downstairs hall, there are a number of ceiling downlights, sunk into the ceiling. Ever since I've lived there, one or another of these blows at the rate of about one every month or so. I've replaced them with 'long life' ones...
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