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pump

  1. B

    Combination Sump Pump Setup

    Hi - I’d like to replace my single old 1 sump pump with a combination unit, primary and backup units. I have a whole house generator so a battery backup sump is not needed - reduces maintenance too. Anyone aware of combination sump units where both are powered by AC? Seems there are plenty...
  2. G

    Surging jet pump not reaching cut off pressure

    Hello, I need some help. Problem: my jet pump fluctuates between 15-35psi and will not build any pressure higher than that. There is a swooshing or surging sound that continually occurs. Location: it pulls water from a lake to supply the house. Lift is 40ft distance from foot valve to pump...
  3. euge595

    Groundfos super 4 water pump

    Hi, Can I replace the head of a grundfos super 4 with a later grundfos model?
  4. K

    Well pump running but no water?

    Hi, So for the past month or so I’ve been intermittently losing water to my house, each time this has happened I’ve been able to manually reset the well pump pressure switch and the pump would turn on and start pumping water. I thought I just needed a new pressure switch, no big deal.. This...
  5. D

    Circulation pump with electrical speed switching for wood boiler stove

    Can anyone help, please? I'm looking for a heating system circulation pump for a domestic install, with 3 speeds, where the speed can be toggled electrically as well as via a push switch on the pump body. I'm using this pump with a wood boiler stove, where I want to run the pump at its slowest...
  6. dave100

    New unvented cylinder / Replace old vented cylinder and add a ST pump?

    Hello, I am renovating a small bathroom in an apartment on the 5th floor. Heating is electric, no gas or oil. I have four (related) questions about this below. I had intended to reuse the cold water tank and the cylinder sitting underneath it but my plumber suggested I replace the cylinder as...
  7. Z

    Unvented cylinder in loft pump on landing, any problems

    So after having engineer drawings back I'm limited to around 90cm of loft height. I was thinking of a preplumbed horizontal cylinder. But now wondering if a pump and zone valves on the landing in a separate cupboard with just the cylinder flow return going to the loft. Is this an ok idea of...
  8. H

    Requirement Circulation pump for the hot water secondary Return

    Silly question (and might already been asked 100rds of time) - I am specifying a circulation pump for the hot water secondary (circulation) return to reduce the wait for hot water. HW is coming from unvented cylinder with a secondary return connection. The secondary return is almost straight...
  9. M

    Heat pump unvented install balanced cold

    If changing a combi boiler system to a heat pump. What do they usually do with the balanced cold connection on the hot water cylinder? Cap it. And put a pressure reducer on the mains so they have equal hot and cold pressures? I can't see them repiping a balanced cold from the cylinder to each...
  10. P

    Shower, boost pump making strange noise

    My Duraspeed pump has started to make a strange noise when water is drawn but I can't see where to add a video. It was already installed when we moved in last year and may have given up the ghost after battling with an air lock in the system? Any help would be gratefully received.
  11. S

    whats a more powerful pump then a grundfos ups 25-50 130

    Hi i have a grundfos pump 25-50 130 p/n 59525418 radiators downstairs are cold and upstairs hot after an 1-hr 2 hrs then the downstairs gets hot i think the pump i have is too weak would would be a more powerful pump to help with this ? thanks
  12. L

    UFH + heat pump - is it connected correctly?

    Hi, we had UFH installed dowstairs in our house recently, and I'm not 100% sure that it's connected correctly. I'd be grateful if someone could have a look at the diagrams and tell me if what the plumber did makes sense. The house is heated with an A2W Samsung/Joule heatpump. The buffer...
  13. pinkman

    Are pump types interchangeable?

    Hi there good people. I have a small issue, I've incorrectly connected a connecter on the PCB of my old boiler back to front, and seem to have broken my pump, since learning my mistake I have put it the right way, it is drawing out about half the current it should. To keep a long story short...
  14. F

    Advice on pump settings

    Hi All, Fitted a willow Yonos Pico pump 25-1-6-130 after the advice on here. What I'm confused about is the pump needs to be set for head at either. 1-4 mtrs or 1-6 mtrs (see below attachment) my system has 8 radiator's and is a closed pressurised system. I worried if I pick wrong setting I'll...
  15. F

    Heating pump recommend

    Hi All, Pump gone on my parents heating system it's a Grundfos 15 60 130. New one best part of £300 is there any other makes you guys would recommend? Thanks
  16. J

    Pump running but no power to boiler

    On a breakdown which is stumping me. The boiler has no power to it even though everything else in the system is working as it should. The 3 way moves across when it should and kicks in the pump but there is no power on the wire entering the boiler.
  17. T

    Monsoon twin pump installation - wrong pump?

    My house was a bungalow that was extended up into the roof, and a bathroom installed up there. The hot water cylinder remains on the ground floor. The mains water pressure is low. A Stuart Monsoon U3 dual pump was installed to pump both hot and cold. I am thinking that this is the wrong type of...
  18. R

    Can anybody advise me on the dissassembly of a Grunfos Magna1 pump ?

    Hello, I have a Grunfos Magna 1 40-120 F pump which starts making a nasty noise after some time running. I would like the dismantle the impellor area of the pump to inspect the bearing surfaces of the rotor. However, I can't seem to see the way to extract it from the pump head. Can anybody...
  19. J

    Pipe size for heat pump system

    I am sizing the central heating pipes for a complete replacement. The property has an elongated floor plan so I have used a piping layout consisting of single flow and return headers running the length of the property and take-offs to and from radiators. Currently there is a combi boiler...
  20. J

    Help me understand this pump curve

    This pump curve is from a combi boiler with an internal automatic bypass valve. Why is the maximum flow obtained with the bypass valve in the middle position? Shouldn't a fully closed bypass valve result in a higher flow through the main circuit? Also, any idea what 'V1' and 'V2' mean (no...

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