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Combi Boiler adding a cylinder

Discussion in 'Plumbing and Central Heating' started by zad3717, 23 May 2020.

  1. zad3717

    zad3717

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    Hey, we have had planning permission granted so our 4 bed 1 bath is soon to be 6 bed 3 bath :)

    we currently have a Vaillant 834? I think which is around 5 years old still has 5 years warranty left so was trying to keep hold of this and add a water cylinder to it

    Is this possible?

    Or would I be better keeping it and getting an additional system boiler?

    I'm fed up with getting a shower and then someone turning a kitchen tap on or watering the garden and the shower dropping in pressure so trying to alleviate this issue.

    Thanks.
     
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  3. cross thread

    cross thread

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    Yes you can add a cylinder
     
  4. +1. I had this done in my old house, worked a treat
     
  5. zad3717

    zad3717

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    Assuming bigger the better? I see Vallaint do a 300lt Unvented would that suffice.

    @iateyoubutler what make did you go for?
     
  6. I don`t know on that one. This was 10 years or so ago. I had a Vaillant combi and added a traditional vented hot water cylinder/header tank. I was fed up with wasting gallons of cold water while the boiler was firing up and sorting it`s life out. The cylinder solved the problem nicely
     
  7. muggles

    muggles

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    Unless you're also going to buy all the Vaillant controls, buying a Vaillant cylinder is pointless. Joule Cyclone cylinders are great quality at a reasonable price. Get one that is the correct size for your hot water requirements. Bigger is not better for running costs
     
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