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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

    Worcester Bosch Greenstar 24i Pump Speed

    Can anyone tell me if the greenstar 24i circulating pump modulates? i have been looking at param 2.1c which references settings 0 to 4, i know the factory default setting is 4 (constant high pressure) which to me implies that it would not modulate on this setting, does it need to be setting 0 to...
  2. F

    Hot feed from twin pump stalls when cold feed starts in bath mixer tap

    Hello All, Hoping for a bit of advice/info in this one: My Setup Small system in apartment with cold tank above hot tank in the hotpress, so fairly low head pressure. Installed a pump about 15 years ago and worked fine until last week (original pump was an Stuart Turner ST55 replaced after...
    • foxotron
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    • america bath cold cold feed hot mixer mixer tap pump starts tap usa
    • Replies: 22
    • Forum: USA
  3. 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...
  4. J

    Adding pump over-run?

    I have a new Firebird Silver Boiler House model oil fired room heat only. I note in the manual all other models in this range have pump over- run connections. But not mine: The circulator pump is wired with the boiler. So when a zone valve opens the boiler and pump both get 240v. Could a...
  5. D

    Stuart Turner Monsoon pump sticking on or off

    We have a Stuart Turner Monsoon 2 bar shower pump which has lately been either refusing to start, or not switching off when we turn off the shower. Tapping the side of the outlet pipe seems to unstick it more often than not, but it's a real nuisance. We have an oil-fired Aga, and the water does...
    • dwinevs
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    • america pump sticking stuart turner usa
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    • Forum: USA
  6. M

    Effect of pipe sizing in heating system

    Current system Danesmoor utility installed in outbuilding. Flow/return connections on the boiler are each 1.5" BSP then straight into 32mm copper for a run underground of approx. 20m to the house. Main pump at boiler is UPS 25-55. Proposal is to replace old boiler with Hounsfield Tuscan 26/30...
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  7. J

    What kind of pump can empty a full septic tank in a remote area?

    I thought I could buy an external pump to pull out with a two inch pipe and send it away from the house.
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  8. R

    URGENT New Hot water pump still running constantly after boiler cuts off

    Scottish Power fitted new pump and claim fault in the tank?? Scottish Power engineer claims fault with sensor in tank however the central heating pump switches off when rads at temp. A Bastian pump was fitted in place of the Grunfos one - I've insisted he returns to fit a Grundfos one as I...
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    • after boiler constantly hot hot water hot water pump pump pump problems running still water
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  9. P

    Replaced CH Pump Primaflow CP5 -> Short Cycling

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  10. B

    fitting a shower pump

    I am pricing for a new bathroom the possible problem is the the customers water supply is a borehole which is pump to a tank in the roof then supplies the house from the tank by gravity can i fit a shower pump or power shower on this type of system its the first time I have seen this type of...
    • BenJamin Mallabar
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    • america fitting pump shower shower pump usa
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  11. J

    Inadequate Circulator Pump?

    My house is a 1970s build fairly well insulted detached 2 storey. Split in 2no zones which are controlled independently with digital thermostats and rarely run at the same time. Downstairs has 9 double rads and 5 single rads. Upstairs has 5 double rads and 1 single rad. Open vent system std...
  12. M

    Changing from spring water to mains

    Hi, I live in an old cottage which is still fed off a spring. There's very little pressure in the system which comes in, then is pumped up to a tank in the loft and is gravity fed. A new house has been built on the end of the row so an opportunity to connect to mains water has come up. Would...
    • Michael_Brook
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  13. E

    UFH not getting hot on vented system

    Hi folks, I’m in need of some sound advice. We have recently had a ground floor extension and have had underfloor heating (company: JK UFH) installed throughout most of the downstairs. We have a few rads still left downstairs and the entire upstairs is still heated through rads. We have a...
  14. G

    UFH must valves open before pump runs?

    The (rather sparse) manual with the controller that was supplied with my UFH (Hettaj describes the start sequence as - when demanded by the stat - valves open then pump runs. As the programmability of the stat is very basic, I’d like to replace it with a smart controller the same as I use on...
  15. S

    New UFH wrong side of pump ?

    Hi Guys Im after any advice or if someone can recommend a good heating engineer in Thanet ?. I had a Wundafloor manifold installed for our groundfloor and new extension (currently 4 zones running) and im having problems with the whole system now and the plumber is ghosting my calls. The...
  16. P

    New mixer tap not activating pump.

    Hi, complete newbie so hope you don't mind me asking for help... I've just had my dripping thermostatic bath/shower mixer tap replaced, which was fab for the first few days. However, it is now taking ages for the hot water pump to kick in when using the bath or shower for the first time. This...
  17. dilligaf

    Shower to powerful (help)

    A friend had a new shower fitted along with a pump but they find it too powerful for them as the person that uses it is in his 80's and it actually hurts him what with his skin being very thin. Its a Aqualisa ipx4 and I wondered if anyone can tell me if the flow rate could be reduced?
  18. B

    Pump is only 9w on highest setting

    My grundfos alpha 2 15-60 130 pump is set to 3 but not pulling more than 9w so all rads are cold. What could be the problem and how can I solve this. Thanks for any help
  19. J

    water circulation pump too hot

    Hi all, I just found the red pump (attached photos) is very hot, is this all right? Or something wrong? The radiators are very hot, the red pump which is workman 25-60 hot/cold water circulation pump is very hot too. My system is unvented cylinder+heat only boiler. Is this normal that the...
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  20. Bogart

    YouTube Video of pipework and pump

    Saw this last night and wondered about a couple of points. 1 You see the state of the pipework at 7m30s and at 7m54s he says he will recommend the customer gets the system flushed. I am thinking that the pipework shown is not like it throughout or surely no amount of flushing will help that...
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