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Recent contents Top users
  1. C

    Spare bleed screw for Grundfos boiler pump? Please help!!

    Hi all, After trying to solve my boiler problem via YouTube as my usual plumber wasn't available, I have stupidly dropped Grundfos bleed screw below the boiler and it has fallen through a gap which is inaccessible. Is there anywhere I can buy spares for this part only or someone who could...
    • citrusry
    • Thread
    • boiler pump
    • Replies: 2
    • Forum: Boilers
  2. M

    CH Pump constantly running

    Evening, just had new boiler and Ch pump. 24hrs later noticed pump was constantly pumping despite schedule being off. Only way to stop it was to turn boiler off, opened airing cupboard to notice slight wet patch from a leaking valve near pump. Fitter sent someone out who drained system and...
  3. samwardill

    Use of microswitch on Honeywell 2-port valve for auxilliary pump

    My boiler struggled to circulate throughout my house so my heating engineer installed an auxilliary pump a few years ago. On a recent service he identified that the auxilliary pump was not working. He said that it was down to the motorised valve and he wants to charge £350 to replace it. He said...
  4. S

    Ideal Logic Combi 30 - pump only keeps activating for 4 mins.

    Hi, As per the thread title, I have an Ideal Logic Combi 30 and I am having a problem with the pump, which keeps activating without any DHW/DCH. When the pump activates, it runs for exactly 4 minutes each time and this can happen as frequently as something like 5 times an hour or as...
  5. S

    How to test central heating pump?

    Happy New Year everyone! I need a little help on figuring out what's wrong with my central heating (CH) system. I'm in a new house, and I know the system has a single motorised diverter valve for hot water and radiators (rads). Problem is almost none of my rads get hot, except for 2 or 3 that...
    • Sam Wain
    • Thread
    • central central heating heating pump
    • Replies: 6
    • Forum: Central Heating Forum
  6. PeterCl

    Best shunt pump temperature

    Hi, we have a Clyde CK5 gas boiler with a Reillo burner. On the front of the boiler it has, as in the photo, the boiler temperature setting on the left, and the shunt pump temp setting on the right. On the right there is the boiler temp gauge. Set as it is in the photo, the boiler...
  7. MAD-DIYer

    Boiler pump questions

    Thanks for having me. New to radiant system as I’m from a forced air background. House has a gas boiler that works well thus far. Examining the setup I see two pumps, the grey unit appears to be the active pump when it kicks in. I’m not sure the role of the red unit. My goal is to replace...
  8. Scott_D

    Condensate pump questions ??

    I think I have only ever fitted 1 in my life. Got a combi swap to do in January fitting a Vaillant ecofit 830 and will need one Whats the best pump for reliability and low noise level? My merchant sells grundfoss and saniflo condensate pumps or do I stump up the extra and fit the vaillant...
  9. dilligaf

    Grundfos Central Heating Pump Weak?

    Do central heating pumps lose their strength over several years and is it worth taking it apart and servicing it? Are the two seals either end 1 1/2 inch or 1 1/3 inch? What's the latest central heating pump should I need to replace mine (photo) like for like?
  10. J

    Pump starts to circulate water?

    Hi all, Recently our house central heating always turned on in the morning (and in the evening of course), but this morning, Saturday, we got up late without turning it on yet, about 9:20ish I heard the pump was making noise! About 9:29ish the noise stopped.---This is to say, boiler not turned...
  11. C

    New Riello rdb oil pump not working.

    Hi all, all new to this breakdown life, currently waiting on getting on a training course, so just been relying on technical and instructions since I passed my oftec. The current boiler is a two pipe line off a tiger loop. I went to a Grant vortex boiler last week where the boiler went into...
    • CJAY40
    • Thread
    • pump
    • Replies: 0
    • Forum: Boilers
  12. D

    Saniflow pump running continuously

    Saniflow toilet pumps ok but doesn’t empty, l think external pipe may have frozen, has anyone else had this problem?
    • Dennis Birmingham B45
    • Thread
    • pump running
    • Replies: 0
    • Forum: UK Plumbers Forums
  13. D

    Do I need a new pump?

    Not sure how long this has been happening but some symptoms have been there a while - only noticed now as the house is cold in this weather plus I had a stuck TRV. House was extended - new radiator on the longest run has never gotten properly hot - it's usually cold. 11 rads total, worcester...
  14. A

    Water tank pump housing cracked

    Hey all! Our water tank pump has been turning off and on by itself and not switching on when needed. Upon investigation, there appears to be a small crack in the water pump metal housing that is leaking a tiny stream of water. Would this cause the pump to keep malfunctioning? If so, are...
    • Aaron Bejan
    • Thread
    • pump tank water water tank
    • Replies: 1
    • Forum: UK Plumbers Forums
  15. A

    Isolated radiator need pump?

    If a radiator is isolated at the end of a run, like a spur on the system ie the feed doesn't go on to another rad, but is sent back to a rad earlier in the run, is a pump needed to near the rad to push the water through more efficiently at this extreme end? At the moment the rad doesn't get...
  16. T

    Salamander shower pump warranty

    plumber purchased and installed a salamander shower pump, pump has stopped working after being used for just less than 6 months. Plumber has replaced with a new pump and is charging me for the new pump and says I need to deal with warranty after the event. I have no receipt as I did not...
  17. A

    Domestic Booster Pump Not Working in Auto Mode

    Hi there. I was wondering if anyone had any thoughts or experience with using Domestic Booster Pumps to raise the pressure of the hot water in your kitchen tap. Any feedback would be appreciated here. I have installed one of these in my kitchen to increase the flow of hot water to my sink which...
  18. Fluke67

    Baffled by intermittent running CH pump on Heatslave 15/19

    Hi hoping someone can help with this as its beginning to drive me nuts. Boiler generally well serviced and working fine, no problems with DHW. Central heating recently began to occasionally fire up as normal and run until it reached temperature set by flow control thermostat at which point...
  19. A

    dream heat air source heat pump, temperature setting in heat mode.

    hi everybody i need some help please, i can't remember how to adjust the temperature setting in heat mode on my dream air source heat pump does anyone know the sequence please? any information would be much appreciated .
  20. B

    Pump advice on pressurised system

    Hi all Following some advice earlier this year on here, I finally have new boiler due to be fitted soon. I’ll be fitting a low loss header as advised due to loss in Vaillant 637. I currently have a Grundfos usp2 on my open vent system which I was planning on using for the time being until the...
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