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hot water pump

An instant hot water dispenser or boiling water tap is an appliance that dispenses water at about 94 °C (201 °F) (near-boiling). There are hot-only and hot and cool water models, and the water may be filtered as well as heated. Instant hot water dispensers became popular in the 1970s. Instant hot water dispensers are very similar to portable shower devices; the latter is fitted with a heating element and quickly heats up water, once a switch has been activated.

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  1. 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...
    • Robert Douglas
    • Thread
    • after boiler constantly hot hot water hot water pump pump pump problems running still water
    • Replies: 1
    • Forum: Central Heating Forum
  2. P

    My New Hot Water Pump (Evosta 3) is over pumping

    Hi, I'm a DIY plumber and new to the forum, and would appreciate some advice. I have an oil fired boiler heating a smallish house. I just took out my old (20 years) copper hot water cylinder and replaced it with a new stainless steel Indirect Unvented cylinder. The old system had a pump on...
    • PaulInEssex
    • Thread
    • america hot hot water hot water pump new pump pumping usa water water pump
    • Replies: 12
    • Forum: USA
  3. P

    Noisy hot water pump and low hot water pressure

    Hi all, I'm hoping you can help me with a couple of questions I have for my inlaws. There house is 30 odd years old and the hot water pump is quite noisy go say the least. It appears easy enough to replace as isolation valves at top and bottom and two nuts to release the pump. My question is...
    • Pete Saxon
    • Thread
    • america hot hot water hot water pressure hot water pump noisy pressure pump usa water water pressure water pump
    • Replies: 1
    • Forum: USA
  4. J

    Hot water pump runs continuously

    I have a Potterton Precision boiler fitted by British Gas 8 yrs ago. All good up to now but in the last few months it has failed to come on a number of times when required by the thermostat. I have had to press the reset button. The pump has also recently started to show it is running at low...
  5. T

    No hot water from pump

    Hi everyone, new to this forum and have a problem. Salamander twin pump has stopped working on the hot side. Not sure if it is a thermostat problem or pump problem. If I turn the pump off at the mains and remove the shower head and lay the pipe in the bath the cold water runs through when the...
  6. J

    Conventional system hot water pump issue

    I have a conventional system and my boiler has Surrey flange. The expansion pipe feeds upstairs bathroom also, but I would like to pump the hot water for upstairs similar to the diagram. Do I have to run a separate feed to upstairs supply?
  7. W

    Firebird 90 - hot water pump runs continuous

    Had a problem with the water pressure in the system rising over 3 bar and blowing the safety - fitted a new heat exchanger and fixed that -- then i had no heating but had hot water - found that the hot water pump was running continuously -- checked the flow switch and that was working correctly...
  8. D

    Shower Hot Water Pump not activating...unless you turn the sink tap on!

    Hi there! We've had a bathroom installed with a new shower. We have a gravity fed hot water system - Not a combi boiler system. We wanted good pressure and were recommended by the fitter to opt for a pump for the hot water and a timer on the immersion heater in the tank to come on in the...
  9. V

    gravity hot water pump heating all vented bleeds weirdly!!!

    Hello All, I have a weird problem that has caught me off balance. About 2 years ago I power flushed an 8 rad system Customer call me a couple of weeks ago complaining that one tad is not warm I checked bottom of rad and found it warm so I opened bleed valve nothing came out. I suggested...
  10. S

    Unvented hot water pump

    Hi guys. I have just noticed a strange white powdery / rust build up on the pump on my unvented system. Is this normal ? Please see pics. Thanks Ste
    • Stevern87
    • Thread
    • above directly hot hot water hot water pump pump reply unvented valve water
    • Replies: 3
    • Forum: Plumbing Jobs | The Job-board
  11. B

    Kitchen tap not activating hot water pump?

    Hi all, I have an electric hot water tank (no gas in building) with an electric pump that is activated when I turn on the hot water taps (cold water has high enough pressure not to need the pump). Recently thought the tap in the kitchen is not activating the hot water pump so it just dribbles...
    • bigplc
    • Thread
    • bathroom electric hot hot water hot water pump kitchen pump tap water
    • Replies: 0
    • Forum: Plumbing Jobs | The Job-board
  12. R

    Hot water pump

    Hi My hot water pump usually runs constantly when taps running. Just recently it's taken to running intermittently - on for 10 seconds, off for 2 or 3 seconds etc. Can you help explain what my problem might be? Cheers Rob
  13. S

    hot water pump

    Grundfos UP20-14BXUT Google have any one used this on hot water return ! how does it work ? what type of wiring does it need , just getting ready for a job ! thx
  14. D

    Rayburn Indirect Hot Water

    Hi there im thinking of installing an indriect hot water system heated by a Raburn with about three or four rads. Ive spent hours looking at diagrams but i cant understand one thing. A pump is needed to pump the hot water around the rads so that they heat up, i get that, simple. But a pump is...
    • doitmyself88
    • Thread
    • boiler central heating system circulation connect cylinder flow gas gravity hot hot water hot water pump hot water system indirect install pipe pipes pump rayburn system tee water work
    • Replies: 7
    • Forum: Plumbing Jobs | The Job-board
  15. C

    Grundfos hot water pump running continuously

    Hi all, Hoping you can help... I've recently moved into a new flat and am a bit concerned about the plumbing. There's a continual hum from the airing cupboard, which contains two water pumps (judging from power lead labels, one for heating, one for hot water). The hot water pump is on 24/7...
    • chrisj14uk
    • Thread
    • boiler central heating system circulation grundfos hot hot water hot water pump labels lead plumbing power pump pumps running secondary store tank thermal timer water work
    • Replies: 9
    • Forum: Plumbing Jobs | The Job-board
  16. B

    Central heating/hot water pump problem.

    Hi there, I decided last night to check my heating system before it gets too cold, and unfortunately I have encountered a problem. I have 4 radiators heating my flat and have a Grundfos selectric 4, Type 450 - 130 pump, probably 30 years old, the problem I have is that it isn't pumping. I have...
    • BigAl
    • Thread
    • boiler central central heating system cold control free grundfos hot hot water hot water pump mains motorised valves potterton power problem pump radiator radiators replacement supply system valves water
    • Replies: 9
    • Forum: Plumbing Jobs | The Job-board
  17. C

    worcester 350 problem ahhhh

    Hi all cannot get a plumber for a couple of days so here is my problem. worcester 350 combi,this tripped out the main fuse last night and everytime i tried to reset it it would trip straight away,this morning same procedure but never tripped out.....no lights/power showing,changed the fuse at...
    • CAT69
    • Thread
    • boiler button code combi fuse gas gas safe hot hot water hot water pump plug plumber power problem pump remove reset safe test water web website worcester work
    • Replies: 7
    • Forum: Plumbing Jobs | The Job-board
  18. W

    New cylinder, New pump. NO HOT WATER. HELP

    I had a leak in my hot water cylinder, i called the insurance, they said id have to replace the cylinder and they would do the rest. I replaced the cylinder and stopped the leak but there was no hot water, the radiators worked but no hot water! I brought a pump thinking the reason the hot water...
    • wright1
    • Thread
    • air airlock cold cylinder flow head help help needed hose hot hot water hot water cylinder hot water pump insurance leak no hot water no water problem pump radiators system tank tap taps test valve water
    • Replies: 9
    • Forum: Plumbing Jobs | The Job-board
  19. D

    De-scaling a heat store DHW coil

    My son has a heat store with primary pumped boiler circuit to heat the store with a second pump serving the CH, controlled by the room stat. DHW is via an internal coil in the store, fed from the mains with a blender valve at the outlet. The problem is that although the store water heats up...
    • diymostthings
    • Thread
    • boiler central heating system combi dhw flushing gas header header tank heat hot hot water hot water pump mains merchants no hot water oil problem pump store system tank taps thermal unvented valve water
    • Replies: 10
    • Forum: Plumbing Jobs | The Job-board
  20. B

    Converting gravity hw to fully pumped....question?

    I am 1 day into a 2 day job which includes changing radiator valves and a few other things, but mainly I am converting a gravity water pumped heating system to fully pumped. This is what I have done so far. The boiler is floor standing in the kitchen with 28mm gravity circs going up to coil in...
    • bigcheese
    • Thread
    • 22mm 28mm boiler central heating system circulation cylinder flow fully gravity hot hot water hot water pump job kitchen pipe pipes pump radiator system valve valves water work y plan
    • Replies: 8
    • Forum: Plumbing Jobs | The Job-board
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