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Discuss Central Heating connections to Megaflow unvented indirect cylinder in the Central Heating Forum area at

  1. Colin Boak

    Colin Boak New Member

    I believe the Primary flow and Return and Pipes to my Megaflow cylinder have been connected the wrong way round as the return pipe is much hotter the Primary flow. Will this in any way have a detrimental effect on the operational capabilities of the Megaflow cylinder.
  2. Best

    Best Trusted Plumber Top Contributor!!

    Has nothing been altered or replaced at your boiler or circulating pump?
    It won't matter much to the heat up of your Megaflow, but the motorised valve can be directional.
    Get the installer back to check it all and connect it proper way, if it is wrong. Or get another G3 qualified plumber
  3. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    valve should be on the flow.
  4. Colin Boak

    Colin Boak New Member

    Nothing altered or replaced at Boiler or circulating pump, will get installer back to double check his pipe connections. Doesn't appear to have affected the heating; radiators are piping hot at the right times when required. However for peace of mind want the job completed properly, many thanks for your response much appreciated.
    • Like Like x 1
  5. Colin Boak

    Colin Boak New Member

    Will get the installer back to check everything over while I'm on site and alter pipe connections where required. thanks for the advice kindly appreciated.
    • Like Like x 1
  6. dan_the_plumber

    dan_the_plumber GSR

    The flow pipe needs to connect into the top of the coil. If it's connected to the bottom of the coil it will still heat cylinder but will take longer and use more gas.
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