grundfos

  1. R

    Balancing radiators with an adaptive Grundfos Alpha pump

    As we have an Alpha pump that I understand changes it power as it detect changes in the resistance to flow (e.g TVRs closing) How do I stop the changes in pumping rate driving me round in a loop while balancing the radiators? Now that I have power flusher our system and got it a lot cleaner I...
  2. R

    Are there any issues with power flushing though a Grundfos ALPHA pump?

    In a few weeks’ time I am going to hire a power flushing machine. The best place to connect and use the machine is in our utility as it has water and drainage as well as the boiler with pipework that is easy to connect to. (And a tiled floor that leaks will not damage) Our system pump is a...
  3. B

    Grundfos Alpha+ 25/60 pump replacement

    Guys and girls Can you help again. I have a pump is tripping the 30mA RCD out whenever the lead is plugged into the pump. The pump is a Grundfos Alpha+ 25/60 with 130mm between ends (used on ufh manifold), could everybody suggest a direct replacement? Was looking at the Grundfos Alpha2 L...
  4. D

    grundfos 15/50

    can you purchase new spindle commutator for grundfos 15/50 pump
  5. D

    replace grundfos 15-50 with wilo smart pump but now have no hot water or central heat

    have replaced the pump but now seems to be no water circulating,have drained and vented rads.disconnected hw zone valve but no water circulating even when hw and ch is on constant
    • dav
    • Thread
    • central circulating grundfos heat hot hot water no hot water pump replace replaced smart valve water wilo
    • Replies: 2
    • Forum: Plumbing Jobs | The Job-board
  6. D

    How old is my Grundfos pump?

    I have a Grundfos Selectric 15-50, which looks similar to the current version but with one significant difference: the speed control knob is white and the numbers are on the flange of the knob and appear in a slot cut in the black surrounding. The only numbers I can see are:983484 and U327...
  7. A

    Grundfos circulator's

    Hello, Could anybody please tell me what the digits 15/50 and 15/60 mean on these pumps. Thank's.
  8. E

    Grundfos 15-50,18

    Was looking for a bit of help my heating is not working so I narrowed it down to the pump and found the capacitor has gone ( split ) was wondering if I could source a new capacitor or is it going to be a new pump ? Thanks for any replies
  9. D

    grundfos#pump number

    I'm looking at Grundfos UPS 15-50 pumps on web and I've finding several different numbers for which seems to be identical 5m pumps, numbers I'm finding are 96281442, 96281448, 96281446, Can someone help explain the differences,
  10. G

    magnabooster2 & grundfos alpha2

    I have 2 spirotech magnabooster 2's and 2 grundfos aplha 2's for sale £60 each or £200 the lot, box's little bit tatty but they are brand new and unused! Would prefer collection in person but will ship at cost to you. items located in medway kent.
  11. A

    grundfos pump noise

    Hi all, just been to a job where customer complained of a noise that had developed recently. It was a kind of pulsing noise, hard to pinpoint to any location, checked all parts of system from boiler up, noticed 3 port valve was nazzed, manual lever was loose, didnt control internals, changed the...
  12. B

    Water pressure issue Grundfos Amazon water pump

    Hi plumber forum users, recentley, I've lost all water pressure on the 1st and 2nd floors of my house, but there is still water on the ground floor. The reason I'm on here is because I've had several plumbers come to give me a quote for a fix, and they have given conflicting advice, hence I'd...
  13. P

    Grundfos Pump

    Evening which cable do I need to wire in a Heating Pump? Cheers --- I am here: http://tapatalk.com/map.php?ppv1ef
  14. I

    Loud Grundfos Recirculating Pump

    Just a quick disclaimer... I know nothing about plumbing... but I'm keen to learn! I've recently moved in to a new place and we can hear a loud pump sound whenever we run a hot water tap/shower. It's a thump....whirr sound (with the thump happening every 10 secs or so). I took a look in the...
  15. P

    Boosting pumps

    Hi A friend has asked be to fit a outside tap in order to fill up a tank for his window cleaning business. He's indicated it needs to be at a rate of 45psi (3.1 bar) in order for the purification on the tank to run correctly. Can anyone give me any advice on products/pumps that are suitable...
  16. C

    Grundfos

    Grundfos 25/80 This pump has failed, can I put a new head on it and if so does it need to be a 25/80 head??
  17. D

    worcester greenstar 24 & 28 i junior.

    i am finding that when doing services on these boilers, the co2 % levels on max and min always need adjusted, are you finding this or is it just me
  18. W

    secondary hot water circulating pump

    iv just installed a unvented cylinder and am fitting secondary return on hot water to provide hot water to taps as house is large with kitchen/bathroom at other side of house to cylinder (installed in garage). Just wondering what bronze pump people buy/use? im looking at a Grundfos UPS 15-50 Hot...
    • westyvip
    • Thread
    • circulating cylinder grundfos hot hot water other pump return secondary water
    • Replies: 5
    • Forum: Plumbing Jobs | The Job-board
  19. K

    20x grundfos 15/50 pumps brand new

    do they have a warranty
  20. R

    Replacing an old Euramo C 2650 pump, help needed!

    Hello everyone, Im usually around the gas forums so hello to everyone first hand! Anyway, Ive been giving a right horrid job. Replacing an old Euramo C 2650 commercial pump. Its a twin head, three phase pump, with 2 1/2" iron either side. The pump appears to have been working on just one...

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