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pumps

A pump is a device that moves fluids (liquids or gases), or sometimes slurries, by mechanical action, typically converted from electrical energy into hydraulic energy. Pumps can be classified into three major groups according to the method they use to move the fluid: direct lift, displacement, and gravity pumps.Pumps operate by some mechanism (typically reciprocating or rotary), and consume energy to perform mechanical work moving the fluid. Pumps operate via many energy sources, including manual operation, electricity, engines, or wind power, and come in many sizes, from microscopic for use in medical applications, to large industrial pumps.
Mechanical pumps serve in a wide range of applications such as pumping water from wells, aquarium filtering, pond filtering and aeration, in the car industry for water-cooling and fuel injection, in the energy industry for pumping oil and natural gas or for operating cooling towers and other components of heating, ventilation and air conditioning systems. In the medical industry, pumps are used for biochemical processes in developing and manufacturing medicine, and as artificial replacements for body parts, in particular the artificial heart and penile prosthesis.
When a casing contains only one revolving impeller, it is called a single-stage pump. When a casing contains two or more revolving impellers, it is called a double- or multi-stage pump.
In biology, many different types of chemical and biomechanical pumps have evolved; biomimicry is sometimes used in developing new types of mechanical pumps.

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  1. B

    Identify Wilo pumps

    How do I decipher Wilo pump numbers? As an example what is the difference between a WILO ST 20/6-3 P and a WILO ST 20/7-3 C or a WILO ST 25/7-3 P Some pumps mention "2,6uF - 400VDB / ~ 230V - 50Hz" on the front panel, is this the start capacitor value? Thanks!
  2. S

    Low water pressure pumps not working

    Pumps and low pressure I moved the bathroom to the back the house (next room) upstairs. I put in two pumps because low pressure water area. One for shower and one for bath. They both work intermittently and I often need to get them started with a magnet! They were new pumps. In the shower the...
  3. chloeradhsaw

    Two pumps on a heat only boiler quotation

    I just had a quote for a new boiler install as follows I dont undertand why a 15-60 boiler pump is needed and a 25-100 pump is needed as well I currently have an ideal mexico 2 heat only boiler - It has one DAB pump on the boiler return and a 2 port valve at the flow pipe to allow for heating...
  4. J

    Air source heat pumps and hot water

    Hi Can somebody tell me if a standard heat source pump installation uses a pressurized hot water tank? Or will the pressure for the hot water be the same as with my oil boiler and water storage tank (gravity-fed)?
  5. T

    Saniflo masticator pumps then stops. Restarts plugging back in

    Hi there. I have a saniflo pump in my basement. When the toilet is flushed it pumps for a few seconds then stops. If I unplug it and plug it back in it will start again. I tried on a couple different outlets and it was the same. I took the motor out and did not find any debris in the...
  6. T

    Positive pumps and shower mixers

    I have a positive shower pump that works well with current gravity system and shower mixer. I want to replace shower and found a mixer valve I like on Victoria Plumbing- But the info on most of their shower valves states ‘Please note a positive pump will not work’ under any circumstances? and if...
  7. Jonnyh88

    Help with setting Grundfos pumps.Single Pipe CH heating system.

    I'm trying to get to grips with a system I have inherited as a new home owner. I know that single pipe systems are crap and should be replaced, but that's not an option right now so I have to make sure what I do have is set up correctly. My bills are astronomical - £6-700 a month right now, and...
  8. V

    Two pumps on heating system. Imbalance?

    Hello, I wonder is I could ask for some advice please. I have just replaced and only gravity fed boiler with a new Baxi heat only boiler. The system is two pipe and has 17 rads in a long old house. The system is 22mm copper except the last 5 rads which are 15mm. (I know this should be no more...
  9. kevintrot

    Which is the best boiler vs heat pumps

    Hello, I am not sure about the boiler as well as heat pump. Please tell me which one I should put in to heat my home.
  10. A

    Is there a disadvantage in fitting to many pumps

    Is there a disadvantage to a central heating system if there’s too many pumps added?? Thanks
  11. 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
  12. N

    UK Heat pumps and pipework

    So with all the news about heat pumps I just started idly thinking about investigating in more detail. So I came here and browsed a bit and from what I understand heat pumps are just not going to work for me. I have two houses: Early 1980s, 4 bed detached, copper microbore pipework...
  13. 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...
  14. J

    Air source heat pumps in the news again

    I'm getting so sick of the media and tories plugging ashp's like they are the solution to all our heating needs. Latest news today, £5k grant towards the cost of replacing a gas boiler with an ashp. What a joke. Every ashp system I've worked on and installed runs the heating at 40 degrees...
  15. CorgiDirect

    Professional Salamander Pumps at the Best Prices. Now Available from CORGI direct

    Professional Salamander Pumps at the Best Prices. Now Available from CORGI direct - https://corgi-direct.com/salamander-pumps-18248-0000 Selecting the Right Shower Pump If you suffer from poor water pressure in your home a shower pump can often be the perfect solution to boosting water...
  16. R

    Shower booster pumps

    We have a shower on a gravity fed system that isn't quite powerful enough to provide an acceptable flow. Don't need a power shower, just a relatively modest increase in pressure. As an alternative to a full size shower pump, has anyone had experience of installing/using the Floflex SP2B In-Line...
  17. Roy_66

    Hydrogen Boilers, Heat Pumps, Funny Cylinders etc. etc.

    Some positive news. For anyone not seen, interesting video from Roger B. on the future for boilers vs heat pumps etc. etc. Includes some more slightly wacky but interesting points like horizontal cylinders and boilers - anyone done one / seen one on hol ? Was interested also that their...
  18. O

    Circulation pump bore diameter

    Can anyone tell me what impact running a circulation pump with a larger diameter bore would have? Currently running an old grundfos 15-6 on 22mm with 1 1/2 threads but looking at a lowara ecocirc 25-6.
  19. O

    Replace grundfos with lowara

    I’ve got an old grundfos 15-60 130 selectric that’s getting replaced as it’s on the fritz. I have had lowara ecocirc pumps fitted for ufh on all 4 floors and think they are great. I would like to replace the grundfos with a lowara ecocirc as well. Would a 25-6 130 work in this case. thanks...
  20. A

    Issues on pumped system

    I have a hot water and cold water pump in the house for the bathrooms in a 3 strorey victorian house. the pumps are not stopping. can someone help. I am in SW116AB - Clapham
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