Tmv Info

Discussion in 'Tech/Mech General' started by rupert, Jun 15, 2015.

  1. rupert

    rupert Funster

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    hi all i have an AT. cheyenne and am thinking about fitting a temperature mixing valve (TMV)to improve hot water supply to shower. anybody have any experience of this ,or know what is fitted as standard. any info would be gratefully received
    thanks alan
     
  2. rupert

    rupert Funster

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    wot! nobody ?
     
  3. Enword

    Enword Funster

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  4. buckby

    buckby

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    Thermostatic shower valve as above is probably the best idea as the tmv may be hard to fit without it working on the shower and the kitchen.
    The pipe work in my Autotrail is 15mm so speedfit fittings will work on it just use stainless inserts if going on to compression fittings.
     
  5. rupert

    rupert Funster

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    thanks for the feed back..i was kinda thinking of using a tmv to control temp of ALL the hot water by fitting near the boiler.
    figuring the boiler can be scalding hot, that way i would have more warm water to shower in
    what do ya think ,does that make any sense
     
  6. tonyidle

    tonyidle Funster

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    Not really. If the water is too hot you mix more cold with it manually. Thermostatic valves make it safer by preventing scalds but only if you're prone too stepping in without checking first.
     
  7. irnbru

    irnbru Funster Life Member

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    Why dont you just turn the temperature knob to heat to a lesse degree or am I missing the point here.
     
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  8. rupert

    rupert Funster

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    trouble is, my shower tap is crap it takes ages to get the temp right then the hot water runs off and yer washing soap off yer
    with cold water (not nice) thats why i'm asking funsters. for there experiences with the cheyenne (2004 ).
    are they all crap or have i a fault
     
  9. andy63

    andy63 Funster

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    hi alan, if I remember correctly, you saw my van at the fix it , so you know its a self build, not a Cheyenne lol..
    but I have a mixer valve on the hot water outlet of the calorifier /hot water tank.. the water temperature on the combitronic heating system can be high so to make the small hot water tank go further they recommend fitting a mixer valve on the hot water outlet... it was a bit lost on me as you can do the same at the mixer tap on the sink and shower anyway, but I installed it and set it to give a hot water supply that I could just about keep my hand under without adding cold at the tap.....if you follow that:)... works fine and can be adjusted easily either way
    ta andy.
     
  10. rupert

    rupert Funster

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    thx for the input andy.
    thats more or less what i'm trying to achieve. although there are mixers fitted within the taps
    these just mix the incoming hot and cold, and because the hot temp is so high any slight adjustment at the tap makes
    a big difference... i.e.. burnt bum. so if i can reduce temp to tap without cooling at boiler i will still get maximum volume
    of warm water...i hope that makes sense haha
     
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  11. buckby

    buckby

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    If you want to do the whole motorhome it will work fine I have got a project on the student accommodation to fit tmv's under an energy efficiency scheme as the hot water will last better if students don't let it go down the drain at 60 degrees
     
  12. irnbru

    irnbru Funster Life Member

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    Easy solution. Set water temp , then get in and wet , turn water off. Soap up then turn water back on and rinse. Saves water and if you dont move your knob it will still be at the same temperature.
    Simples :)
     
  13. rupert

    rupert Funster

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    hmmm. thanks for the input irn.... but I've gotta move my knob to turn water off ,and when i turn water back on it starts either cold or red hot. maybe your later AT. has got a thermostatic mixer at the shower tap, but as far as I'm aware ,on my earlier AT. the shower mixer is not thermostatic. unless someone can enlighten me to the contrary
     
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  14. TheBig1

    TheBig1 Funster Life Member

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  15. rupert

    rupert Funster

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    thanks for the link. it is different from the one i have fitted.that maybe a solution
    ta biggy
     
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  16. scotjimland

    scotjimland Funster Life Member

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    sounds like a Whale mixing tap..

    You could change it for a Reich KAMA single lever mixer tap with shower head, as fitted to Hymers
    they operated by moving the mixing tap left / right to adjust temperature.. and up / down to turn water on and off, so once you set the temperature you can turn on and off at will and have the same water temperature ..
     
  17. rupert

    rupert Funster

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    well i finally got around to fitting a tmv . the only suitable place to put it was under the plinth, in base cupboard in the shower room. the trouble is there is only a small opening to work through, this makes it awkward, but i should be ok to do key hole surgery now. I've just had a shower in it , and it seems good. plenty of hot water and a much smoother control of warm water delivery.and no chance of scalding. tmv cost about £20 plus a replacement fitting and some plastic pipe £5.. it is a definate improvement and glad I've done it. but because it was so awkward to do, in such a limited space, not sure if i would take the job on again
     
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