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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

    Pump advice on pressurised system

    Hi all Following some advice earlier this year on here, I finally have new boiler due to be fitted soon. I’ll be fitting a low loss header as advised due to loss in Vaillant 637. I currently have a Grundfos usp2 on my open vent system which I was planning on using for the time being until the...
  2. P

    Constant head pump for old combi?

    Hello forum, 1st time here. The Grundfos 3-speed pump in a Worcester Heatslave 15/19 oil combi boiler is on its way out. The boiler is old but in v good nick. The network is trunk/branches. All rads (but one) have TRVs. Pump is set on max, which seems to be what it needs when supplying all...
  3. J

    Pressure Pump strain on incoming line?

    Does a pressure pump system add additional strain to the line coming from the city water meter to my house? 200' run
  4. bob the fiddler

    S-Plan redesign for ufh, buffer tank, dhw, heat pump /with solar

    I have looked at the S-PLAN wiring diagram (standard) for my new UFH/DHW system, but I don't think it offers me the best use of the new heat pumps resources, given i want to run the heat pump at low temp for a long time during sunlight hours only. Instead I came up with different control plan...
  5. J

    pump on solid fuel to overcome pipe drop

    Hi Looking at some time connecting my solid fuel boiler up to HW cylinder, problem i have is where cylinder is the first floor drops by about 350mm so can not get a continues rise in pipe work, attached should be a diagram i think would overcome this issue, can you see any issues with what i...
  6. R

    control underfloor heating pump wirelessly?

    hello newbie diy-er here looking for some guidance please :) gas boiler (downstairs) was connected to underfloor heating pump and valve (attic, along with hot water storage tank), coming on with the hot water the wiring between the two has failed - cable was exposed to water leak - so now I...
  7. F

    32 Ideal Vogue Max - reduce pump speed? (noisy expanding pipes)

    Hello all, At the start of the year I had a 32 Ideal Vogue Max fitted and all was well, it's working fine. Problem is, I was getting floors done at the same time so I had a very limited time to notch out / felt between the pipes & joists. I thought I got them all but, I didnt and the noise is...
  8. 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
  9. S

    Plumbing in a de-strat pump.

    Hi, first post here and am after some advice please. I'm having solar panels fitted in the next few weeks and the fit will include an iboost+ to use the immersion element to generate hot water. I've checked the immersion and using a couple of heat sensors it's apparent the element only heats the...
  10. P

    Boiler Short Cycles only when cover on

    Good morning everyone, Have a bit of a unique issue, ive only found 1 reference to it on the internet with no answer. For some quick backstory, in Jan 22 my CH water circulation pump killed itself. This old pump was replaced and i troubleshooted some short cycling and with the help of this...
  11. gmartine

    Bahco Slip Joint Pump Pliers (8224) Offer.

    Seems like a good deal...£16.57 with discount code. eBay item number: 154980230006...
  12. M

    Salus MP100 pump replacement

    I think my old Salus MP100 circulating pump maybe on the way out. Sounded a little noisy and now I’m getting an error (no water flow) message on my new Ideal heat only boiler and it’s not coming on. Ideal engineer coming next week. I see there is a new model MP200A which I may get it swapped...
  13. K

    Underfloor Heating Pump Settings

    Hello, I have a piped underfloor heating system in the kitchen. The valve/mixer/pump unit is under the stairs. It has a number of settings and a digital display. Settings include PP1, PP2, CP1, CP2, I, II, III, Auto, a number followed by W, and what looks like a night mode setting. When I...
  14. 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...
  15. J

    Condense pump pipe run

    Hi all, I'm due to fit a condense pump on a boiler install. I'd love an easy install. The little plastic pipe from the condense pump obviously goes up first. But after that? Can I get away with a short (3m) horizontal run before I run it into the soil stack? Or would I be pushing my luck...
  16. T

    Is my circulation pump failing or my boiler control?

    I have a Viessmann Vitogas 100, installed about 17 years ago by a previous homeowner. It also is the boiler for hot water, so it runs all summer in hot water only mode. I’ve turned the heating component back on, but it’s not working properly. It would appear the circulation pump stops working...
  17. M

    Does anyone know what replaced the Salamander PL 50 TWIN pump please?

    Does anyone know what replaced the Salamander PL 50 TWIN pump please?
  18. T

    URGENT Positive or negative pump

    Hansgrohe Raindance Select E Shower System 120 with Showertablet Select Thermostatic Mixer and Shower Rail 90cm - 27027400 This shower states can be used with a universal (negative head) pump but my pump is a gravity fed positive head installation. My question is would I be ok to use this...
  19. 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...
  20. K

    Salamander CT75+ Xtra pump no longer comes on in en-suite shower

    Hi, The pump has been installed for 2 years (and is the same model as the one that was there for the previous 5+ years). It starts up fine with the main family bathroom, but since we returned from holiday it doesn't start when then ensuite bathroom shower is turned on. The pump sits in the...
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