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  1. C

    Blockage in HW pipe behind built-in thermo shower mixer

    It would; but in reality it is very highly unlikely, because the individual HW feed going up to the mixer is a simple unvalved tap off from the main run coming straight from the calorifier that supplies all outlets in this bathroom and also the second bathroom next door to it. As there has been...
  2. C

    Blockage in HW pipe behind built-in thermo shower mixer

    A bit far out - but at present all options are open. Perhaps you could explain to my wife, along the lines of:, "If you want to control the temperature, just kneel down and reach over and raise that floorboard - then reach further down until you feel a knob, then turn it clockwise for warmer...
  3. C

    Blockage in HW pipe behind built-in thermo shower mixer

    Don't know what a filter is (in a mixer), and don't know what a cartridge is. I've searched for a book called "Plumbing for Idiots" but I haven't found one yet. Meanwhile write to me as though I am an idiot and we might get somewhere. As you will see elsewhere in this post, I've had the mixer...
  4. C

    Blockage in HW pipe behind built-in thermo shower mixer

    I did that first twenty years ago, and then again a few years back. I opened it up right back to exposing the hot inlet pipe - it was dry. I then turned on the hot supply (and not the cold) and not a drop came through. Behind that hot inlet there are three elbows in the run until it gets to...
  5. C

    Blockage in HW pipe behind built-in thermo shower mixer

    It can't, can it? I typed out nine lines of an answer to you to explain why it could, but as the logic came home to me I realised that if the mix were too hot then the thermo has no way of limiting the hot flow or increasing the cold. This leads on to Idea No. 2a - which is that if I insert...
  6. C

    Blockage in HW pipe behind built-in thermo shower mixer

    Scenario: Around 1991 I installed a Rothermix thermo shower mixer at chest level and an outlet for the fixed shower head about two feet above it, all set in recesses that I cut out of the clinker block inner skin of the wall to the bathroom. I used compression jointed pipewrk with Bosswhite...
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