Combi hot water tank

Discussion in 'Plumbers' Talk' started by Matthewm123, Oct 16, 2021.

  1. Matthewm123

    Matthewm123 Member

    Hi,

    I have a flat which has a vented, direct combi hot water tank. There is 2 immersion heaters. One on economy 7 and another that acts as a boost at any time. It is a ground floor flat.

    I need to replace it as it is leaking and has been for some time. I am trying to decide whether to get a like for like replacement:
    https://www.tradingdepot.co.uk/rm-1200-x-450-copper-direct-economy-7-combination-hot-water-cylinder

    or whether to get a unvented unit such as:

    https://www.screwfix.com/p/rm-prostel-unvented-direct-cylinder-120-litre/51564

    Thoughts please? It only serves a kitchen and bathroom sink. 2 people live in it.
     

    Attached Files:

  2. dcox

    dcox Screwfix Select

    You probably have poor hot flow with your current setup which would improve hugely with an unvented cylinder but it would need a route for safety valve pipework drainage to either outside or an existing waste connection. And it would need someone with an unvented qualification to fit it.
     
    Matthewm123 likes this.
  3. Matthewm123

    Matthewm123 Member

    Thanks, pressure isn't actually that bad. There is already an overflow pipe that runs to waste that could be used
     

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