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  1. M

    My resolved problems with central heating and hot water

    Would you recommend cleansing the system with an Fernox F3 cleaning solution ? Would you attempt a mains powered-flush?
  2. M

    My resolved problems with central heating and hot water

    I did ask lots of questions in my initial thread https://www.diynot.com/diy/threads/how-to-flush-a-heating-system-with-mains-water.38902/ which started off mostly with questions about the Honeywell diverter valve, and then mostly how a pump can be rotating yet not pumping, but the answers were...
  3. M

    My resolved problems with central heating and hot water

    I have a y plan open vent system as below And I had the following symptoms initially for a period of months which gradually got worse 1) The central heating would occasionally not work 2) Banging on the valve would often cause it to start working, accompanied by some gurgling sounds 3) When...
  4. M

    Honeywell v4073a1039 motorised 3 port valve: should moving lever to manual allow flow?

    Thank you very much for that information about the air removal device. The header feed tank is in the loft on the cross beams and the pump is, as you can see from my pictures, is about a 40 cm off the floor of the 1st floor of my house. So that gives a separation of over 2m from feeder tank to...
  5. M

    Honeywell v4073a1039 motorised 3 port valve: should moving lever to manual allow flow?

    Well I have started bashing away with the spring wirey thing designed to remove blockages in pipes, and unsurprisingly it gets stuck at the 3 way joint. And it comes out black with magnetite. If I tackle it from above or below, I can't get through. Should I be able to poke a wire from one side...
  6. M

    Honeywell v4073a1039 motorised 3 port valve: should moving lever to manual allow flow?

    Ok I have now tracked down where the blockage is and have identified some potential culprits. Soooooooooooooo I can start trying to clear the blockage with some sort of pipe clearing thing I have, a sort of wirey thing mostly used for clearing toilets I think, or I can start to dismantle...
  7. M

    Honeywell v4073a1039 motorised 3 port valve: should moving lever to manual allow flow?

    Well in trying to remove the pipe from the feeder tank with a spanner I put too much force on the nut which instead of coming undone rotated the pipe and tore it to pieces. I know I should have used two spanners but I couldn't see that the fitting to the tank had a nut on it where I could locate...
  8. M

    Honeywell v4073a1039 motorised 3 port valve: should moving lever to manual allow flow?

    Dan, anyway, thank you so very much for that suggestion, I do believe that is what I will do! I suppose if I cut the feed and find that it isn't horribly blocked I can always join the old pipes together.
  9. M

    Honeywell v4073a1039 motorised 3 port valve: should moving lever to manual allow flow?

    The pipes near the pump are not clogged up, but then that is new pipework put in 8 years ago, I don't think the rest of the central heating can be like that because it was all working fine a week or so ago or at least it would work when I bashed the area around the pump for a bit.
  10. M

    Honeywell v4073a1039 motorised 3 port valve: should moving lever to manual allow flow?

    WOW!!!!!!!!!!!!!!!!! Those are some scary pictures!!!!!!!!! Are they of feed pipes or just pipes in general?
  11. M

    Honeywell v4073a1039 motorised 3 port valve: should moving lever to manual allow flow?

    Well I can do that. I even have pipe benders and the like. Hhhhhhhhhmmm.......... and the amount of copper tubing required is quite small and I can join onto the existing pipe work with a simple joint. It doesn't seem like there can be any other explanation for the lack of water. And of...
  12. M

    Honeywell v4073a1039 motorised 3 port valve: should moving lever to manual allow flow?

    That was the conclusion I initially came to, but then I realised that required that there is a constant loss of water in the system when the heating is used intensively that has to be made up with the feed. Perhaps that is a reasonable assumption. Is there a good way to clear it such a pipe? I...
  13. M

    Honeywell v4073a1039 motorised 3 port valve: should moving lever to manual allow flow?

    The only thing I have questioned is your claim that bleeding radiators with the pump on or off makes no difference. To claim anything else is simply erroneous. You have not offered any answers to many of my questions such as 1) What does the grundfos pump offer that the dabs doesn't 2) What is...
  14. M

    Honeywell v4073a1039 motorised 3 port valve: should moving lever to manual allow flow?

    Are you saying that there is no difference between 1) Opening a bleed screw with the pump active 2) Opening a bleed screw with the pump off Because if you are, I think you are wrong. I have done this on an upstairs radiator when my pump was working some years ago and there was a big difference...
  15. M

    Honeywell v4073a1039 motorised 3 port valve: should moving lever to manual allow flow?

    I don't understand the disparity in price between a DABS pump va55/130 http://www.dabpumps.de/sites/dabpumps.de/files/2016-03/VA_VB_VD_TS_ENG.pdf and a seemingly very similar spec Grundfos 15-50/60 are so different in price, one is £36 the other £90. I know that the Grundfos meets some...
  16. M

    Honeywell v4073a1039 motorised 3 port valve: should moving lever to manual allow flow?

    In fact I might remove the pump and see if it can pump water by attaching some pipework and fittings and feed from a large bucket of water! That would be a definitive test!
  17. M

    Honeywell v4073a1039 motorised 3 port valve: should moving lever to manual allow flow?

    Dan, thank you very very much for that info. Assuming I have a problem with the 3 way valve, and it is stuck on HW only, is there an easy way to see if water is flowing around the HW system? I have established from opening the bleed screws on the radiators with programmer in CH mode that...
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