1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Discuss Boilers and Powerflush - a one time deal ? in the Central Heating Forum area at UKPlumbersForums.co.uk.

  1. jitasb

    jitasb New Member

    Is there a "typical" interval for doing a powerflush?
    Reason for asking is that it was mentioned on a recent visit by "ServeHome".
    I couldn't swear to it, but I'm sure that when it was done previously I was told that I only needed it to be done once.

    History: All in 2009.
    New Boiler (British/Scottish Gas 330+ High Efficiency Boiler).
    Installed MagnaClean Filter.
    PowerFlush done.
    Installed System Water treatment.
    Boiler serviced - Annually (2009-present)

    So coming up to 10 years since the install above. Is this typical time-span after which efficiency falls enough to require further action e.g. Boiler replacement, power-flush etc ?

    Is it something I can check myself e.g. If the radiators aren't warming up enough, or there are cold spots in them etc . then is that a sign of accumulating sludge ?. Can't say I have noticed anything obvious. I do get situations where they are hot at the bottom and cold at the top. But usually I just use the 'key' to let the air out from the top and then they seem to fill up ok.

    Probably "how long is a piece of string" question, but just wondered if anyone had any thoughts. Many Thanks.
  2. Harvest Fields

    Harvest Fields S. Mod Trusted Plumber GSR Top Contributor!!

    If BG power flushed the system. Then if it needs doing again call them and they will do it for free the second time. As long as you are still the homeowner. As far as I can remember.
    • Agree Agree x 1
  3. Riley

    Riley S. Mod Trusted Plumber GSR Top Contributor!!

    Correct BG power flush carries a lifetime warranty. It’s in the very small print
  4. Jones82

    Jones82 GSR

    Generally speaking if a radiator is cold around the outside but hot in the middle its air, if its hot around the outside but cold in the middle its sludge. However the pump may need attention or the radiators balancing.

    Strange for this to be mentioned in summer... people don't usually have the radiators on this time of year, maybe the home serve guy was up selling or trying it on
  5. Millsy 82

    Millsy 82 Plumber GSR Top Contributor!!

    I should imagine in the very very small print you get a lifetime warranty as long as they look after it for the entire time.
  6. Chalked

    Chalked Plumber GSR

    The trouble with powerflushing is that if you don’t cure the cause of the sludge and air ingress, it will need it again in a few years.
    • Agree Agree x 3
  7. jitasb

    jitasb New Member

    Thanks for replies.
  8. Last Plumber

    Last Plumber Trusted Plumber GSR

    If the system was installed correctly, cleaned and treated then it should be fine. I would not expect it to need another flush.

    The Boiler has an expected life of around ten years dependent on use.
    If it is working well, leave it. It may be ever so slightly less efficient than when it was installed but it is not going to be something you would normally notice (provided the system was installed correctly and left clean) on your Gas bill or in performance, particularly as you have had it serviced regular.

    It probably is not worth spending too much money on if it breaks down due to age, as all parts are the same age and will likely be worn to the same degree. Like the old car, once you start spending it tends to go on and eventually you are going to replace it anyway.

    If you feel unsure about the water quality or doubt what you are being told, then if you are reasonably competent at DIY, you can take a water sample from the system and have it analyzed. If you look online for the Fernox System Health check, that will tell you what to do and you will receive a test report back and advice on the water in the system. Forewarned is forearmed.
  9. Warmiger

    Warmiger New Member


    The powerflushes carry a lifetime warranty only if you have the home care plan in place and don’t break it.
    If you don’t have the certificate it can still be verified.
    If it’s the boiler I’m thinking of it’s a rebadged glow worm.
    The heat exchangers on them are notorious for blocking up unless I just come across all the bad ones.
    If you don’t have any issues I would say dose the system with inhibitor and all should be good.
    If you want to see how dirty the system is you could buy a tds meter and check a sample of the water.
    Hope it helps
  10. Riley

    Riley S. Mod Trusted Plumber GSR Top Contributor!!

    That’s just not true about homecare. I have two customers that had flushes and started getting circulation issues and BG reflushed foc no questions asked
    • Agree Agree x 1
  11. Warmiger

    Warmiger New Member

    Thats what it states on the certificates I issue. That’s to keep the lifetime warranty.
    All flushed otherwise come with a 12 month warranty.
Similar Threads - Boilers Powerflush deal Forum Date
Lochinvar High Efficiency Boilers Central Heating Forum Friday at 6:01 PM
Thorn emi fanfare boilers? Gas Safe Registered Plumbers Only Jul 7, 2019