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  1. M

    Vaillant Hot Water Short Cycling

    Sorry, don't understand. How would that give the problem we have?
  2. M

    Vaillant Hot Water Short Cycling

    I'll check the pipes. Stat is brand new a couple of weeks a go, problem was there with the old one too.
  3. M

    Vaillant Hot Water Short Cycling

    3 port. Yes, we get hot water when requesting hot water only
  4. M

    Vaillant Hot Water Short Cycling

    Cylinder stat at 55. Don't want to go lower than that!
  5. M

    Vaillant Hot Water Short Cycling

    Not a combi here, conventional system. S. 53 has gone away with dropping d. 0 to 10. Down from 18. Was only on heating side also, no s. 53 on hot water
  6. M

    Vaillant Hot Water Short Cycling

    Sounds identical! Really hope someone here can help us. Have you tried anything thats improved it?
  7. M

    Vaillant Hot Water Short Cycling

    Hello Posted another thread about annoying noises from hot water system. Think I've now narrowed it down to expansion. And repeated expansion as boiler short cycles, pipes cool, reheat, expand, repeat. Vaillant 418 boiler. Working fine on CH request, previously throwing S.53 states but is not...
  8. M

    Cold water tank refill noise

    Bit of a delay to fit the valve, sorry. I fitted it today, float at lowest position. Fill much quieter and other noise gone. Thanks for your help and suggestions
  9. M

    Hot water noise, tapping / knocking

    Another update this morning, noise is still there and I think I now understand why it's repeating like it is. I noticed the pump and boiler turning off and on repeatedly this morning, so seems the boiler is cycling when hot water is running. It's a Vaillant ecotec plus 418 boiler. I noted S.8...
  10. M

    Hot water noise, tapping / knocking

    New valve is "Strom". Never heard of them, can't find much information on them either. Old valve was unknown, very old. Best picture I can get of the set up. IMG_20191027_161501 by miniwill posted 27 Oct 2019 at 4:17 PM
  11. M

    Hot water noise, tapping / knocking

    Tried dropping it right down, no difference.
  12. M

    Hot water noise, tapping / knocking

    I can try it. It's an Evosta pump with proportional speed, so 6 settings to choose from. Last night I turned it up to it's maximum, where we've been running it previously. Before that we've had it as low as 3/6 but I found the radiators were taking too long to heat up.
  13. M

    Hot water noise, tapping / knocking

    Going to keep bumping this thread. Really need some new ideas of things to try. I've been searching the internet for similar problems and I'm struggling to find any. I bled all the radiators and magnaclean last night. Only a small amount of air came out and the problem is just as bad this...
  14. M

    Cold water tank refill noise

    The valve is wrong. Will need to change it for part 2. Thanks very much for the information, I didn't know. To avoid float bounce, is there something that should be done when fitting part 2? I gather part 2 can be adjusted where as part 1 can't (other than bending the arm).
  15. M

    Cold water tank refill noise

    Oh! Thanks for the heads up. I'll check, I didn't buy the part.
  16. M

    Cold water tank refill noise

    Yes you might be right, I think it starts right at the end of the fill so maybe the valve is bouncing. Can't be certain but think it was this: https://www.diy.com/departments/fluidmaster-brass-float-fill-valve-pt1-1-2-/5011629016902_BQ.prd
  17. M

    Cold water tank refill noise

    Recently had a problem with our ball cock in cold water tank. It wouldn't shut off and consequently went to overflow, turns out the overflow was poorly installed so we had a nice leak onto the loft floor! Replaced ball cock and refitted overflow pipework so it should now seal. Have a new noise...
  18. M

    Hot water noise, tapping / knocking

    Well, no improvement, over the weekend and still none the wiser. I am a bit puzzled, thinking about it this morning. I am not 100% convinced it is expansion. As I mentioned, the noise repeats, even after an hour of the system being on so it should all be well up to temperature by then. It's a...
  19. M

    Hot water noise, tapping / knocking

    No pipework has been altered. We replaced the ballcock on the cold water tank over the weekend too and while the pipework is next to it in the loft space, nothing has changed there. Bathroom refit also carried out the week prior but again, no changes to pipework related to hot water system and...
  20. M

    Hot water noise, tapping / knocking

    We have a conventional boiler system, small tank in the loft, hot water cylinder in upstairs cupboard with pump and Y port valve and boiler downstairs. Earlier this year had new timer / control unit fitted, new Y port valve, new pump and new hot water thermostat. Since the beginning of this...
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