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Discuss Back boiler to combi in the Central Heating Forum area at UKPlumbersForums.co.uk.

  1. Mark Burnham

    Mark Burnham New Member

    Hi, new to the site so please bare with me.

    I have a property which is rented out, up until recently to a single guy. In the last month or so his partner and children have moved in making it a home for 4.

    The current heating system is powered by a baxi boiler with water tank in the loft.

    Tenants are now complaining that it’s a chore having to turn the boiler on and waiting to get hot water and that the tank doesn’t hold enough water to fill 4 baths.

    I believe this is the start of a number of conversations they’ll be instigating to try and get me to replace the heating system with a combi.

    I’m reluctant to do so because the current system is still very efficient, services every year and of course the associated costs.

    My question is how much does replacing a back boiler with a combi tend to cost (north east)? Also, the pipe work is 8mm microbore, does that make any difference to the installation or would it just be a case of fitting appropriate valves to adapt to that size at the boiler?

    Thanks

    Mark
     
  2. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Depends on the system but me personally I would want to price for repiping as it’s 8mm

    As for costs anywhere from 4K -8k you might get some cheaper but you can tell where they have cut the price
     
    • Agree Agree x 2
    • Like Like x 1
    • Disagree Disagree x 1
  3. scott_d

    scott_d Plumber GSR Top Contributor!!

    4 baths!!
     
    • Like Like x 2
    • Funny Funny x 1
  4. KingDoey

    KingDoey Plumber GSR

    How long is a piece of string..

    Depends where in the country you are/what brand of boiler you want/ what size boiler/ whether the gas pipe work will need upsizing/ type of flue etc etc. No two jobs are the same so all depends. There’s loads of variables.

    Yes you can get valves for the microbore, however be aware that microbore does not always hold up when the system is pressurised.

    Best bet is to get several quotes from local firms mate.

    Good luck
     
    • Like Like x 1
  5. Mark Burnham

    Mark Burnham New Member

    Ha I know. There’s an electric shower so that part of the argument with them is redundant.
     
  6. Riley

    Riley S. Mod Trusted Plumber GSR Top Contributor!!

    Do they have controls do that hot water can be set to a timer
     
  7. Mark Burnham

    Mark Burnham New Member

    Yeah there’s a timer, doesng look like they’re putting that feature to use though.
     
  8. Riley

    Riley S. Mod Trusted Plumber GSR Top Contributor!!

    I’d offer to put in a more user friendly programmer/timer in the first instance.
     
    • Like Like x 1
  9. scott_d

    scott_d Plumber GSR Top Contributor!!

    I would imagine all the hot water is used by bath 1 or 2. They then have to wait for it to reheat for the remaining baths
     
  10. Riley

    Riley S. Mod Trusted Plumber GSR Top Contributor!!

    Any stored water solution will struggle with 4 newly drawn off baths. What’s wrong with one after the other and topping up with hot. As long as nobody pees in it you’re fine
     
  11. Svenedin

    Svenedin Member

    I think your tenants are asking a bit much. It's not like a hotel with unlimited hot water. It's perfectly normal to have to wait a bit for the stored hot water to reheat if it's all been used. Switching the hot water on and waiting for it to heat up is silly if there are regular bath times. It would be better to have the timer get a tank of hot water ready and then stay on long enough to reheat the water for the next bath. I have mine set like that so that it doesn't keep hot water all night when it's not needed. Comes on early in the morning ready for morning ablutions. Mind you we are creatures of routine and habit.
     
  12. Rob Foster

    Rob Foster Top Contributor!!

    Stick a water meter in there, problem solved. centralheatking
     
    • Like Like x 1
  13. Ben-gee

    Ben-gee Plumber Top Contributor!!

    First world problems..
    Surely you just go in one after the other starting with the cleanest, for some reason I always had to go last....
     
    • Funny Funny x 1
  14. Rob Foster

    Rob Foster Top Contributor!!

    you had a bath ! we had it tough
    we had to share sucks on pear drops and lick our own chocklate to make sure the others did not steal it
    centralheatking
     
  15. Svenedin

    Svenedin Member

    Bath? We lived in a septic tank...
     
    • Funny Funny x 1
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