hot water cylinder
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.
View More On Wikipedia.org
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Replace leaking hot water cylinder or change to combi boiler?
Hi, In my 2 bedroom flat I have a Worcester Greenstar 24i boiler and a 200 litre Zip AquaFlow hot water cylinder. The hot water cylinder has started to slowly leak from the bottom and I think it will need completely replaced - quote to replace is around £1000. Given that this is only a 2...- gmacdon76
- Thread
- change combi hot water hot water cylinder replace
- Replies: 2
- Forum: Central Heating Forum
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Electric boiler and an unvented indirect hot water cylinder
Hi, I have recently purchased a cottage with an LPG combi boiler (no mains gas in the area). I intend to replace this with an electric boiler and an unvented indirect hot water cylinder. The boiler will run four radiators and the hot water cylinder. The cottage has one bedroom. What size (kw)...- DavidB
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- boiler cylinder electric electric boiler hot hot water hot water cylinder indirect unvented unvented cylinder water
- Replies: 5
- Forum: Central Heating Forum
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Leaking Unvented Hot Water Cylinder
Hi, I've got an unvented hot water cylinder with a leaking pipe. The job is in a residential property in pontefract.- Elliott
- Thread
- cylinder hot hot water hot water cylinder leaking unvented water
- Replies: 0
- Forum: Plumbing Jobs | The Job-board
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Renovation Issues - Hot toilet and extreme shower temps
We've recently just moved into our recently renovated home and we've found out that we've got some interesting plumbing issues, the first one is that both the upstairs and downstairs toilets are hot (the cistern water is hot) and radiating through the toilet and wall (concealed cistern), and the... -
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Hive installation - dual zone heating with Combi boiler and hot water cylinder
Hi all, At our old flat, we had a combi boiler which dealt with heating and hot water without an additional tank. There was an external timer next to the boiler, and a room thermostat (manual) in the hallway. I was able to replace the latter with a receiver and wireless (not smart) thermostat...- DougieDJ
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Using a vented hot water cylinder on an invented system
Hi, Can you use a vented hot water cylinder on an unvented system? Many Thanks, Carl -
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unvented hot water cylinder in a roof space of a two storey house
unvented hot water cylinder in a roof space of a two storey house in an existing property what is best option for discharge pipe to terminate.It will be 22mm copper but didn't want to run it all the way down the back of the house to ground level if possible. -
C
What is the thread out of the top of a hot water cylinder?
I want to fit a sussex flange to a standard hot water cylinder about 10 years old, normally there is a 1inch bsp tapping, this one has a male thread out of the top with a compression 28mm to 22 mm end feed reducer, held in place by a 28mm nut and olive, it does not have a male iron to copper... -
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Water cylinder re heat time
Hello all, i am doing work for a customer who has asked me what the reheat time of a 250 litre cylinder is. To be honest after all the years of doing plumbing this is a question that i have never been asked before because usually if you need a hot water cylinder then it is what it is, you just... -
H
Should I dpressurise hot water cylinder?
I am closing up a property for 2-3 months and will be turning mains water off. Hot water is supplied by a pressurised water cylinder in the loft. Should I depressurise it before I leave the property? If so is it simply a matter of switching water off and run hot tap for a while? Any advice...- Hillabaloo
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- america cylinder hot hot water hot water cylinder should usa water
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- Forum: USA
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Has my hot water cylinder coil broke?
Hi All, On Thursday there was a water leake a few steets away from us And we had no water most of the day. About 10 minutes before my neigbour said the water supply was back on I remember hearing a fair amount of activity from our airing cupboard. I took this as water/air moving through as the...- Dave18183
- Thread
- cylinder hot hot water hot water cylinder water
- Replies: 60
- Forum: Central Heating Forum
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Do I need an unvented hot water cylinder?
Hi there, we are due to have a new shower room built in a loft conversion. We are a family of 5, with one existing bathroom. Will we need to have an unvented hot water system installed to enable the 2 showers to run successfully at the same time? Pressure and flow at house is 2 bars/18 litres...- dwight33
- Thread
- cylinder hot hot water hot water cylinder unvented water
- Replies: 2
- Forum: Bathrooms, Showers and Wetrooms
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URGENT Leaking hot water cylinder pipe
Hi I have a leak from one of the pipes, going into the hot water cylinder, in the airing cupboard. There are 2 pipes going into the cylinder on the left hand side, (I think it is called a vented cylinder - colder water tank in loft) and it is the top pipe which is leaking, (the one with yellow...- bluemermaid
- Thread
- cylinder hot hot water hot water cylinder leaking pipe water
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- Forum: Central Heating Forum
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G3 qualification and unvented hot water cylinder certificate
Hi, I've had a boiler and unvented pressurised hot water cylinder installed. I have received the Gas Safe certificate for my boiler install but nothing for the cylinder. I've been in touch with the plumber and he says he doesn't apply for that for customers and I would have to do it myself. Is... -
S
Identifying limescale in a hot water cylinder?
Hi there, I have a 20 year old hot water cylinder, which is heated from an oil boiler (aga), and has an electric immersion element as well. I don't get much hot water out of the system before it turns cold, and I've been told it might be limescaled up and need replacing. I installed 4... -
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Reason for usual HW shutoff valve location
In a conventional system, the standard arrangement is to have a gate valve on the (typically 28mm) cold feed pipe from cistern to cylinder. Out of curiosity, I was wondering why you won't find it on the hw pipe (typically 22mm) going out of the cylinder instead. Of course, positioned after the... -
A
Gravity system - Move Hot Water Cylinder to Roof Space?
We've had conflicting advice from two plumbers - I wonder if anyone here can clarify. We have a gravity fed system system, currently with the hot water cylinder alongside the boiler which is in a separate 1 story room with some roof space. We're looking at moving the cylinder into the roof...- arjc1
- Thread
- cylinder gravity hot hot water hot water cylinder move roof space system water
- Replies: 7
- Forum: Central Heating Forum
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Dripping hot water cylinder from upper thermostat... Is it safe?
Hello I live in a rented flat and have noticed water dripping from the top thermostat of the water cylinder (see picture). It worries me as there is clearly electric wiring nearby, and also another thermostat at the bottom that the water is dripping towards. My landlord's plumber is... -
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No hot water from hot water cylinder
Having difficulty with our hot water from hot water cylinder. Now don't have a clue which taps / valves should be on or off. No hot water coming through to the taps at all. Any help would be appreciated. Thanks -
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Combined direct vented hot water cylinder
Hi, I have a combined direct vented hot water cylinder installed in my flat and it works on economy 7. Just recently I have noticed that when I open a hot tap the water didn't come out warm and also after about 2 minutes the cylinder or pipework to it started juddering. Just in case the heating...- Mrtoastie1
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- Replies: 3
- Forum: USA
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