• Welcome to PlumbersForums.net - The international free plumbing advice forum. Professional plumbers sharing advice with fellow plumbers and DIY alike. Register for free today! - Checkout the Plumbing Advice forum and then our Plumbing Videos area which still needs populating.


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.

View More On Wikipedia.org
  1. M

    Shower Pump getting noisy

    Hi, I had a new en suite bathroom fitted around 5 years ago, initially all good, gradually the Shower Pump started to get noisier, and eventually stopped working after about 2/3 years. I bought same pump (Salamander) and swapped it over, everything was good, so quiet, gradually noise has started...
  2. B

    Salamander Negative Pump Pulsing issue

    Recently had a Negative pump fitted that was sourced used to keep costs low. The pump has followed all the tests provided by Salamander support and runs perfectly. However when hooked up to the Thermostatic valve it pulses. 6 seconds on, half second off, 6 seconds on and so on. If i remove the...
  3. B

    Advice on shower pump pipework

    Hi all, Missus has decided to upgrade the shower to one with a rainfall head, and so naturally it's another job added to the list for me I'm trying to work out how much change to the existing pipe work I'm going to need to do, and would be grateful for any advice. Currently it's a power shower...
  4. A

    Samsung Air Source Heat Pump

    My ASHP has been set to 55 degrees C for the legionella in the control panel but I thought it had to be set to 60. Engineer seemed to think this is ok. I note that in 6 weeks I have had error E919 which is telling me the unit couldn't perform the correct heat for legionella thus the error code...
  5. M

    CH pump leaking even after replacing

    I have a Grundfos pump attached to my UFH manifold. Noticed the floor boards below were warping and that it had been leaking ever so slightly for some time. Removed it, cleaned seals etc, tightened back up, leaked. So bought a replacement (UPS3), with new O rings and it leaked again...
  6. S

    Central heating pump

    Wondering if someone can answer my queries. We have a firebird C35, downsized to 26kw condensing boiler. 2 Ufh manifolds and rads. When the boiler runs the rads and manifold 50m from boiler the boiler runs perfectly. When the boiler runs the closest manifold 15 m away from boiler heating approx...
  7. K

    Air to Air heat pump

    Has anyone installed / worked with air-to-air heat pumps? I wonder if their running cost is also high? There’s no information on running cost and even the people handling the funding pots for Air source heat pumps, are not aware of the costing.
  8. beccabeyond

    Shower pump for kitchen tap?

    Can I run a line from my shower pump to my hot water kitchen tap to increase the pressure? If yes, would I call a plumber or electrician?
  9. T

    Can you run 2 showers off one 2 bar salamander pump,

    I have pump running one shower , can I take pipes from outlet to run another shower, gravity fed one just trickles out, we have large hot and cold tanks,
  10. G

    Bronze record. pump control - PIR and timer?

    Need to spec a bronze. pump for a secondary return circuit. Furthest point approx 35 metres in 22mm. Any recommends for which pump size and type? This circuit serves an occasional-use bathroom which may not be used for a week at a time. Since it's occasional use I would like to be able to...
  11. D

    Can I place my shower pump as shown in diagram?

    Hi all, My shower, toilet, and hotpress are all on the same wall in a small apartment bathroom. The wall is 1,860 mm in width. I bought a Stuart Turner 2.0 bar universal twin shower pump to power my new shower. I am replacing the toilet with a wall hung one supported by an Ideal Standard...
  12. Chris Eley

    Problem with shower pump

    I have a customer with a shower pump feeding the downstairs bathroom, kitchen hot and a hot tap and mono tap upstairs but downstairs works fine but the pump won’t feed the upstairs supplies, any ideas of a fix? The upstairs will work as long as something is open downstairs to get the pump running
  13. J

    Washing machine pumped waste

    Hello Installing washing machine in remote location under stairs/ no drain near by here’s what I’m proposing but never done before so thought I’d have an ask, Fit washing machine with hose into hockey stick trap then connect to Grundfos sololift C-3 lifting station, core through the wall to...
  14. D

    Boiler pump speed alternating

    I have a Worceseter Greenstar 12i feeding an indirect cylinder and two central heating zones, controlled by a 3 channel programmer. The heating zones have a thermostat each and TRVs on all the radiators except the towel rail. Whenever the system demands heat - to the cylinder, a heating zone, or...
  15. D

    Possible Problem with an EVOSTA 2 pump

    Hi all, I have had a new Grant boiler system fitted which powers 22 rads and an immersion heater - 8 of these rads are large double convectors. We have had a lot of issues with the install of this Grant boiler but my main issue is if the pump is man enough for this system. As mentioned it's a...
  16. H

    Water pump pressure Issues..

    Greetings, newbie here, kindly seeking advice on a water pump issue I have. Before I get started, I'd like to mention that I'm a complete novice and have no prior experience with pumps or plumbing. Basically, I'm in the process of purchasing a home that is out in the sticks and has a 120ft...
  17. D

    Best location for a water pump

    Hello all, I have an upstairs bathroom with a Triton electric shower that reduces to a freezing trickle if any taps are turn on elsewhere in the house. There is no storage tank and the water enters the property downstairs and is fed throughout the house by 15mm pipe. I'm thinking about putting...
  18. nvneplumber

    Ram pump in series with water level controller

    I have a draft Idea to connect water level control valve in series with ram pump . This setup will be inside inlet of loft tank. The Idea is to pull water from Over head tank in to loft tank quicker. Please review and suggest. water level control valve : ram pump: Design: Loft tank inlet =>...
  19. J

    Pump hoses can be bent?

    Hi, I just had a shower pump installed, but the manufactory Salamander Pumps Technical Advisor said :"The silver anti vibration hoses are bent 90 degrees. These are to be straight as per manufactory installation guide. For this reason, as how it has been installed it will not validate the...
  20. B

    How to fit Salamander Twin Pump?

    Hi all, I'm new to this site and have basic knowledge of plumbing. I'm trying to fit a water pump on the floor of my cupboard to increase the hot & cold water pressure on my sink mixer tap, bathtub and toilet (all are connected on the same pipes). But I have no idea what pipes I would need...