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  1. R

    Can Grundfos UPS2 fail slowly?

    Yep it's completely cleared all the way to the pump, I'm really surprised it's going up the vent considering the suction from the pump. Could it be from air still in the system, or a bad layout? Otherwise I think the method Johntheo5 suggested is the way forward. Thanks again for you help with...
  2. R

    Can Grundfos UPS2 fail slowly?

    So you were absolutely right, completely choked up at the cold feed and vent area. I've now cleared it and replaced some pipe. The system is now getting nicely hot everywhere. I took the pump head off for a clean as well, and it was free of magnetite. When I put it all back on the pump was...
  3. R

    Can Grundfos UPS2 fail slowly?

    That bend at the bottom scares me but I'll give it a go. Annoyingly the magnet is sticking on the first bend after the mag.filter, so carp has got backt there too!
  4. R

    Can Grundfos UPS2 fail slowly?

    Thanks for your helpful reply. There's also some magnetism down on the ubend before the pump, so I'm going to chop that one as well! Cheers!
  5. R

    Can Grundfos UPS2 fail slowly?

    Hi Elkato, here is a pic of my upstairs airing cupboard. Boiler is downstairs. My magnet is sticking on the ubend before the circulating pump and all the way up the pipe before this. Is that a normal place for magnetite build up? I dont understand the direction of travel from the boiler up to...
  6. R

    Can Grundfos UPS2 fail slowly?

    I took the head off and cleaned out the impeller with a cable tie so should be good. Can I buy a new impeller? Worth a go. Thanks for your reply
  7. R

    Replace Grundfos ups2 15-50 or not?

    This seems affordable, what's your experience like with them? Can't find much online. Cheers
  8. R

    Replace Grundfos ups2 15-50 or not?

    Yes all balanced as far as I'm aware. Ive tightened the lockshields up as much as poss upstairs. Does it matter that at the end of the line downstairs is the biggest rad in the house? Cheers
  9. R

    Replace Grundfos ups2 15-50 or not?

    Hi all, I've got the above pump. I took the head off to clean out the crap in the impeller and put it back together again, I've had sentinel x400 running for almost a month now. My 11 rads dont heat up when all are turned on, but if i isolate downstairs then they work, same for if upstairs is...
  10. R

    Using X400 - lockshield valves fully open?

    Decent advice will do that in future as much easier access!
  11. R

    Last rad being a nightmare to heat up, no CH when HW called as well

    Morning, Thanks to those who have helped me so far as my mission to show the missus I'm not completely useless continues. I've got a massive radiator on the end of my open vented system downstairs. It's a double thick one, over 2m long but only about 50cm tall. It's a nightmare to heat up...
  12. R

    Using X400 - lockshield valves fully open?

    I drained down completely first, then chucked sentinel in, then turned mains water back on and then started filling up the CH system. My worry was that the x400 might sit there at the bottom of the tank not mixing in with the new water as it came in. I wondered if instead I should have done a...
  13. R

    Using X400 - lockshield valves fully open?

    Yes I do in upstairs bathroom.
  14. R

    Using X400 - lockshield valves fully open?

    Thanks, I've cleaned up the F and E. Then dumped the bottle of Sentinel in, then turned the mains water back on and it filled up. I've read elsewhere that I should have poured it in gradually as the water fills the F and E. Does that matter? Cheers
  15. R

    Using X400 - lockshield valves fully open?

    It was looking a bit murky and the last rad won't get warm downstairs, thought I would give it a try
  16. R

    Using X400 - lockshield valves fully open?

    Hello, Im going to drain down and put some x400 in the F and E tank in loft. Should I fully open all lockshield valves up to enable good flow throw the system? Or should I keep them balanced? In hoping to clean out a fair bit of sludge as the pump is struggling to reach the last rad in system...
  17. R

    Replacing 3 way diverter valve

    Thanks, I was indeed going by what the counter lad said Do you reckon I should do 3 turns of PTFE on the olives to seal it up?
  18. R

    Replacing 3 way diverter valve

    Apologies it's a mid position valve
  19. R

    Replacing 3 way diverter valve

    Hi all, I'm going to replace my 3 way diverter valve as I did the head only and it's still not working properly. I'm hoping it will be a straight swapover. Can you please advise if I should sand down the pipes and use ptfe tape when doing back up? What method do you use? Cheers, Rusty
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