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hot and cold water

A hot water storage tank (also called a hot water tank, thermal storage tank, hot water thermal storage unit, heat storage tank and hot water cylinder) is a water tank used for storing hot water for space heating or domestic use.
Water is a convenient heat storage medium because it has a high specific heat capacity. This means, compared to other substances, it can store more heat per unit of weight. Water is non-toxic and low cost.
An efficiently insulated tank can retain stored heat for days, reducing fuel costs. Hot water tanks may have a built-in gas or oil burner system, electric immersion heaters. Some types use an external heat exchanger such as a central heating system, or heated water from another energy source. The most typical, in the domestic context, is a fossil-fuel burner, electric immersion elements, or a district heating scheme.Water heaters for washing, bathing, or laundry have thermostat controls to regulate the temperature, in the range of 40 to 60 °C (104 to 140 °F), and are connected to the domestic cold water supply.
Where the local water supply has a high content of dissolved minerals such as limestone, heating the water causes the minerals to precipitate in the tank (scaling). A tank may develop leaks due to corrosion after only a few years, a problem exacerbated by dissolved oxygen in the water which accelerates corrosion of both tank and fittings.

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  1. Jimmu0161

    Cold water at the hot tap

    Got intermittent hot water coming the from a combi boiler to kitchen mixer tap when it hits the T junction for the upstairs bath it's hot, but on the other of the T junction to the kitchen mixer tap it's stone cold, anyone any ideas ?
  2. S

    Shower installation water feeds

    I have just purchased a Mira digital pumped shower This will fit above an existing bath. Can I use a T from the 22 mm bath feeds to connect the hot and cold to the module. Currently the bath is fed from below floor level. Ideally I would take a feed from the hot water cylinder and from the...
  3. N

    Can I adjust the hot/cold water flow into a shower head?

    I’m hoping someone can help me. I’ve had a bathroom installed, and the whole process has been a nightmare. The plumber has now disappeared, and left things half finished. Some stuff I can sort (toilet and towel rail not actually being secured to the floor, bath not sealed around, leaking bath...
  4. N

    How to install hot and cold water to sink valve

    Hi folks, Newbie here. I'm having trouble connecting the washing machine hot and cold water valve to the below sink. As you can see in the picture, the valve is already connected to the sink above it. I would like to confirm whether I need to unbolt the below hex cap so that I can connect the...
  5. J

    New boiler setup - hot and cold water cycles repeatedly

    Hello - I recently got a new Worcester Greenstar 30i 30kW Combi Boiler 7733600005 installed in my property. Previously I had a 37KW combi boiler but that was 10 years old. But my plumber said that 30KW combi boiler should be more than enoguh. The day this was installed, I also had my water...
  6. J

    Hot and cold water leaking from overflow pipes of unvented hot water cylinder

    We have discovered hot and cold water coming out of the overflow pipes of our hot water cylinder. What could be the cause of this?? Thank you in advance for any advise!
  7. A

    Low hot and cold water pressure

    Hello, I have been experiencing low water pressure from both hot and cold taps throughout my property. It is all electric no gas and I have a cylinder in the airing cupboard. I do not have any instructions on how to repressurise and really struggling to find a solution online that have worked...
  8. B

    How Do I Shut Off My Water Supply?

    Hello! I'm planning to replace my bathtub mixer, but obviously need to shut off the water before I begin. There are no valves for the hot/cold water pipes in the bathroom. The problem: I'm in an apartment and my water tank is old (circa late 80s/early 90s). I can't figure out what needs to be...
  9. G

    Shutting off hot and cold water.

    Hey guys....changing shower in the basement of a 4 story house...i think hot water is off a gravity fed hot water cylinder and the heating is off a boiler..... to shut off the water supply I switched off the mains coming into the house, turned off the boiler(just switch at front no valves), 2...
  10. K

    Low pressure hot and cold water in bathroom

    Evening, looking for a bit bit of advice - a few days ago I ran a bath but some little bits of dirt kept coming out so I just turned the bath off and didn't think anything of it. I ran a bath this morning but it took ages to run and the pressure on both the hot and cold water tap was quite low...
  11. V

    Where are my hot and cold water stop valves (stop cocks)?

    Hi, I've been wanting to find out where exactly the stop valves (stop cocks) for hot and cold water are. Hopefully one of you can help me with this! I took some photos and numbered the valves - here's the link: Where are the hot and cold water stop valves? - Album on Imgur Could you...
  12. W

    Hot and Cold Water Reversed Throughout House - But Fine After Shower (TRY #2)

    Hi, Ever since we moved into and refurbished our new house, the plumbing has been strange to say the least. The faucets in the kitchen and in every bathroom do this weird thing where the water comes out a little warm when we set the tap to maximum cold, and a little cool when we set the...
  13. U

    Hot and Cold Water Reversed Throughout House - But Fine After Shower

    Hi, Ever since we moved into and refurbished our new house, the plumbing has been strange to say the least. The faucets in the kitchen and in every bathroom do this weird thing where the water comes out a little warm when we set the tap to maximum cold, and a little cool when we set the...
  14. A

    External hot and cold water pipes

    Hi All, Looking for some advice/reassurance. Coming to the end of a loft conversion which includes an en suite. The builders we have used told us that running the hot and cold water pipes internally would cause damage to our existing bathroom/tiles. So their solution was to run the pipes...
  15. eagleeye

    Pumped hot and cold water

    I've just fitted a stuart turner monsoon 1.5 bar twin pump in a friends house. Couldn't get a surry flange at the time so just came straight off the top of the cylinder with the vent and hot feed to pump. The hot and cold outlets downstairs are fine but its the shower and basin upstairs that...
  16. G

    Hot and cold water feed underground

    Hi all, I need to run hot and cold feeds to a new building for existing property. The run is about 20m. Any ideas on what product to use?
  17. M

    Distance between copper hot and cold water pipes and electric board

    Hi is there a set distance copper hot and cold water pipes need to be from the main electric (fuse) board/ consumer unit in a domestic property?
  18. MZR

    pumping hot and cold water supply's

    Hi All, just been asked by a customer who has a cottage round the corner from me if theres a pump on the market that will increase his hot and cold supply to the taps and showers ? the kitchen sink is on mains pressure which is all good the rest of the house is tank cold fed and the hot is on...
  19. J

    Issue with seperate hot and cold water pumps...

    Hi, I'm dealing with a slightly complicated scenario. Essentially, my parents and I will be living in the same building; I'll have an apartment and they'll have the penthouse above me. For cost saving reasons and to save on roof space, our intention was to have a shared Solar Water Heater (SWH)...
  20. M

    BSI - Hot and Cold Water Supply. 3rd edition

    Anyone used or referenced the above book? It's around £40, but looks quite useful.
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