Posting a message to the forum will remove the above advertisement
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  2. Checkout our Plumbers Insurance area - heavily discounted Public Liability Insurance and Van Insurance specifically designed for plumbers.

Discuss Vaillant ecotec pro hot water in the Gas Safe Register Forum - Public Forum area at

  1. Hugbru

    Hugbru New Member

    Hi Guys

    I have a Vaillant eco tec pro 28 at home.
    Good boiler, no real problems as of yet.

    The only thing is when we run the hot water for the washing up etc it will go hot for a couple of minutes then go cold until I open up tap more. then go hot again.

    I haven't really touched up on boilers in college yet, but I am thinking, could this be a small blockage in the heat exchanger?

    Its not a massive issue but would like to know your thoughts on this because it will help me with my learning also.

    Another thing is, I would like to powerflush the CH system as I had a leak the other day on a TRV and the water was filthy black. so would like to flush it and treat it. The rads are piped up in microbore (which I Hate) but is it ok to flush with microbore or in your experiences does it cause more problems than its worth.

    Thanks Guys
  2. scott_d

    scott_d Plumber GSR Top Contributor!!

    I would fit a filter then go for a mains flush, then chemical flush.
    You might block the micro bore with a power flush.
  3. Hugbru

    Hugbru New Member

    Thanks Scott_d, I currently have a Spirotech filter which I flushed through the other day after I fixed the leak.

    I have been looking at the magnaclean2, I don't really like these Spirotechs to be honest.

    With a mains flush, can I attach hose to lowest rad drain cock and run into outside drain and open filling loop?

    Cheers mate
  4. scott_d

    scott_d Plumber GSR Top Contributor!!

    You could use the drain in the spirotech or a rad drain off

    Make sure you are not pushing the water and sludge through the boiler

    Flush each rad individually
  5. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    IMO spiros ars built superbly but dont work .
    Magna pro 2 on my installs .
    I dont think you can power flush micro bore , but you could use a magna-cleanse on it , if you fit a magna filter
    • Like Like x 2
  6. Hugbru

    Hugbru New Member

    Yes, I will fit a magna pro 2 and then see about hiring magnacleanse.

  7. king of pipes

    king of pipes Trusted Plumber GSR Top Contributor!!

    Your diagnosis is spot on now the tricky bit how to clean it out , hotflush ,cold flush , chemical clean for a week, hotflush , cold flush again take out the plate put in a bucket and powerwash it out , rebuild, fill add inhibitor vent job done .
    • Like Like x 1
  8. cmel1975

    cmel1975 New Member

    would it not be the aquasensor missing a few fins
    • Like Like x 1
Similar Threads - Vaillant ecotec water Forum Date
F22 error on Vaillant Ecotec Plus Boiler Central Heating Forum Nov 2, 2018
Boiler Response time Vaillant Ecotec Plus Central Heating Forum Sep 7, 2018