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grundfos

Grundfos (Danish pronunciation: [ˈkʁɔnˀfʌs]) is the largest pump manufacturer in the world, based in Denmark, with more than 19,000 employees globally.
The annual production of more than 16 million pump units, circulator pumps (UP), submersible pumps (SP), and centrifugal pumps (CR). Grundfos also produces electric motors for the pumps as well as electric motors for separate merchandising. Grundfos develops and sells electronics for controls for pumps and other systems.

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  1. S

    Grundfos Pump UPS3 Head

    Hi Guys, Got a knackered Grundfos UPS 15-60 130. Have a replacement Grundfos UPS3 15-50/65 130. Is the UPS3 pump head compatible with the UPS 15-60 body so I can just replace the pump head, or would I need to fit the UPS3 body as well? Thanks
  2. D

    Grundfos Default setting

    Hi everyone. Bit of a daft question but I’ve just had the pump replaced by the housing group where I live. They’ve fitted a Grundfos UPS3 15-50/65 and the fitter has left it on the default constant curve 3 which is a bit noisy and seems overpowered for the property, they’ve also snapped the...
  3. H

    Grundfos UPS 3 pump - blocked message

    I have moved into a house which uses a Grundfos UPS 3 pump to circulate the water in a wet underfloor heating system. Last autumn the pump would not start - the blocked message showed - so I replaced it. This year, the same thing has happened with the new pump. I have freed the impeller using...
  4. H

    Grundfos Super Selectric circulator pump concerns

    With only the hot water programme running, my Grundfos pump switches on and off throughout the day and night. It runs on a 4.5 minutes on and 1 minute off cycle. It only stops when the hot water programme switches off at around 10pm. This seems to have started since I had my emersion tank and...
  5. E

    Grundfos MLE 132E speed control

    We have a Grundfos for a domestic water booster application. Everything is set up for constant pressure, discharge pressure sensing and all appears okay, except we cant get the motor to run in "auto". We can run in manual at a constant speed, okay. But we try and go to control, the pump will...
  6. B

    Can Grundfos UPS2 fail slowly?

    Hi there, I have a grundfos ups2 whirring away and it takes ages to warm up the rads in my house, and then only to a lukewarm temperature. When i turn off all the TRVs upstairs to push heat downstairs, the rads down there get hotter, but again they take ages to warm up. The pipes out of 3 way...
  7. J

    Grundfos Replacement UPS3 V Alpha 1

    I want to replace the three 11 year old Grundfos UPS 15-60 130 pumps as a part of trying to reduce the electricity consumption of my heating/DHW system. The pumps circulate the water in i) the UFH, ii) the first floor rads and iii) the mains pressure DHW cylinder primary circuit. The Grundfos...
  8. J

    Grundfos Sololift 2 WC-1 not working

    I have a grundfos sololift 2 wc1 macerator that isn't working. It's about 3 years old. When the toilet flushes the bowl just fills up but the motor does not kick in. There is power going to the unit, The macerator motor/pump turns freely. I took the motor apart in the hope that there may be...
  9. S

    How do you bleed new style grundfos pumps?

    Just wondering how these new style pumps can be bled if there's no longer a big bleed screw in middle? Any comments on this hugely appreciated. Thank you
  10. S

    Grundfos ups3 pump, what speed.?

    Hi, recently had a Grundfos ups3 Pump fitted and get a hissing noise out of it and then 2 of the closest radiators start to gargle, I’ve change the speed down to constant 2 as it was on constant 3. Would constant speed 1 be ok as its a bungalow with 8 radiators.? Thank you.
  11. M

    Grundfos 25-80 Pump - Magna1 versus UPS2?

    Replacing boiler and will be fitting Grundfos 25-80 Pump (recommended by pump sizing calculator). Any thoughts or advice on Magna1 versus UPS2? From what I can see the Magna1 is a large beast but space not really an issue for me, but is it actually worth it? On paper specs look quite similar...
  12. P

    Grundfos Flange Size

    Before having a boiler replaced in the spring, I’m cleaning the system and upgrading the pipe work in the cellar, where the old boiler is. Following forum advice, I’m replacing the 10 meter run of pipes from the boiler to the start of the four existing 22mm Hep2o circuits (one per floor) with...
  13. B

    New Grundfos UPS3 15-50/65 130 Circulator pump fitted no heating and hot water - FD Fault code

    I have a 5 year old Ideal Logic 15 boiler that has been working alongside an old Grundfos pump possibly about 10years old. The boiler was recently (about 3 weeks ago) repaired and services by an Ideal technician. I had a plumber yesterday from Local Heros who came to fit a new Grundfos UPS3...
    • Brytto
    • Thread
    • america central heating system circulator code fault fitted grundfos heating hot hot water new no heating pump usa water
    • Replies: 7
    • Forum: USA
  14. A

    Why is my new circulation pump twice as loud as previous model?

    Hi all, Let me start by saying, my heating works fine. I only know the basics of a system, and this may well be just me and my sensitive hearing... I have been in my property for 5 years. I had a Wilo circulation pump, which purred wonderfully. I never took a photo of it as a reference, but it...
  15. S

    Grundfos pump making unusual sound/boiler not coming on

    First post so greetings to all! We have a problem with our elderly Potterton boiler and its Grundfos pump as follows: Boiler started behaving erratically, switching on & off at short intervals Within days boiler stopped coming on at all Noticed that Grundfos pump was making an unusual sound as...
  16. S

    Grundfos V Stuart Turner

    Hi All I have a Grundfos Amazon SSP 3 bar positive head pump fitted, pumping domestic hot water. Its always been on the noisy side, been in for about 10 years. I had been thinking about changing it for a Stuart Turner Monsoon 3.0 Single which is more expensive. Is it a better quality pump, will...
    • sticky01
    • Thread
    • america grundfos stuart turner usa
    • Replies: 4
    • Forum: USA
  17. Roaders

    Dab E.Sytank vs Grundfos Home Booster

    Hi All I want to increase the water pressure in my home as showers really are pretty underpowered. I have been recommended the DAB E.Sytank that I will install in my attic alongside my Hot water unvented cylinder. This should great but the tanks is 87cm * 60cm (or similar) and my attic hatch is...
    • Roaders
    • Thread
    • america booster dab grundfos home usa
    • Replies: 7
    • Forum: USA
  18. M

    Grundfos comfort pm recirculation

    Hi, I have a new home with one of these fitted. The documentation is pictorial and woeful on operation. The unit is fitted correctly and in operation and pumps ok. There are three indication lights on it - a thermometer (which I think is for operation in temperature mode - I think this is...
    • Murrayp
    • Thread
    • america comfort grundfos usa
    • Replies: 9
    • Forum: USA
  19. J

    Grundfos Home Booster connected to drinking water supply?

    Hi all Amateur/DIYer here. I have just moved into a 3rd floor flat and it has a more complicated plumbing set up than I'm used to. There is a Grundfos Home Booster installed, which seems to be working fine. However I have noticed that it seems to be switching on and pumping (fairly loud hum)...
    • Jason90
    • Thread
    • america booster connected drinking grundfos home supply usa water
    • Replies: 6
    • Forum: USA
  20. R

    Pump noise Grundfos

    Can anyone tell me what the noise probably is with my pump, it's not extremely loud but is irritating. Its a hum/vibration. Turn the volume up when watching. I have tried: 1. Reducing the pump to low which makes it slightly better but not much. 2. Bleeding the valve, small amount of air...
    • Rbanksy
    • Thread
    • america grundfos noise pump usa
    • Replies: 6
    • Forum: USA
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