hot water supply
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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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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Ferrolli F30 Domestic hot water supply cuts out.
Ferrolli F30 Domestic hot water cuts out??Sirs,I have a Ferrolli F30 combi boiler. The domestic hot water supply from it goes cold about every minute for about 10 secs then heats up again, usually when in the shower.Annoying, but it may fail altogether eventually. This appears mainly when the...- bloggit
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Recurring airlock? in hot water supply
Over the past 3 or 4 months I have noticed the hot water flow from the bathroom tap reduces daily until it becomes a trickle, the kitchen hot water tap also reduces flow but not the same extent. I am now regularly having to use the washing machine hose connection solution to clear the...- grekko
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Vaillant TurboMax hot water supply problem
I have a TurboMax VUW282E which has given many years of good service, however over the past week it has developed a problem with the DHW supply. When drawing hot water the boiler starts as normal but then after about 15-20 seconds shuts down and then, after about 7 seconds, starts up again...- kirkle
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new boiler but no on demand hot water
hi guys this is my first post on here and was hoping someone may be able to give me some advice. i am a tennant and recently our gas operated back boiler was condemned after is failed its yearly landlords inspection. this was duly replaced with a combi style boiler in the airing cupboard and...- bobrick
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combi double feed tank/cylinder rads hot but water cold!!!
was wondering if anyone could offer any advice, the system was recently drained for a radiator to be changed. After refilling all rads were bled, as well as a bleed valve situated near the cyclinder. The radiators are working fine if anything they appear to be a little hotter than normal but...- mannersme
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Surrey flange installation
Hi there, I live in a 40yo council flat.Back then they've installed a cold water tank and an immersion boiler .The boiler is situated on floor level which means that we could only take bath.That is not very practical though since there's 4 of us and the immersion is on central electricity so...- VitioTika
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RE: Arisotn unvented electric immersion heater. NO hot water for 6 weeks
I am a private tenant, from Dec 2009 until Feb 2010 I was without hot water in my rented property, landlord arranged for electricians / plumbers and maintenance men to fix the heater, After 7 weeks between them they finally fixed the heater by changing immersion and thermostat and also fixed...- rgriff
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worcester bosch 28i junior hot water problems
I hope someone can help me with this as i am about to pull my hair out. Here goes when i turn on any hot tap the boiler fires up ok and i start getting hot water no probs, if i turn up the hot tap up full the flow comes really fast the same as the cold water but the water from the hot tap goes...- ozzwaldo
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Timers and programmers
Fitting an external programmer to a combi boiler, what are the do's and dont's You must uninstall the original programmer, which means adding wires together not to break the circuit before you install the external one!! Just a bit confused of the two black wires from the "clock, programmer which...- spanner
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How to turn off hot water supply
Hi guys, I was hoping there's someone on here who can advise... I am trying to replace the taps in my kitchen as the teeth have gone and they spin. I know how to turn the cold water off at the stopcock but need to check I am doing the hot water bit right. We have a copper cylinder upstairs...- polkadot
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MDPE for external hot water supply?
Hi Guys I have a customer who wants me to plumb in a hot water supply to her shed. Can it be done? It will be about a 3 metre pipe run, under large paving slabs. Has anyone had experience with this kind of thing? Can it be run in blue MDPE? (I guess I'll need some frost tape and lagging etc.)...- Lance Williams
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Poor hot water supply
I have a brand new combi boiler which is working fine and putting out plenty of hot water (radiators & shower fine). However hot water supply to the bathroom and kitchen sink is very slow to respond and is luke warm at best- volume of flow is fine. For some reason we can get hot water from the...- bob900
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