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WJEastman
Joined: 29 Mar 2007
Posts: 2
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 Posted: Fri Mar 30, 2007 4:41 pm Post subject: Raising Hot Water Cylinder |
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I intend moving a hot water cylinder from first floor into the roof space.
What are the requirements, how high should the cold water tank be in relation to the cylinder. Can I fix the shower pump in the roof space or should it be down at first floor level. |
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wonderb0y
Joined: 17 Dec 2006
Posts: 57
Location: Leeds
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| Posted: Fri Mar 30, 2007 10:04 pm Post subject: |
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you want to put both the cylinder and the tank in the loft or just the tank? the tank is usually situated just over the cylinder, as high as possible as this will give you greater preasure.
as for the pump if you want to put a pump near the tank then you would probably need a negative head pump. it might be better to check the manufaturers instructions for how low it has to be below the tank |
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WJEastman
Joined: 29 Mar 2007
Posts: 2
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| Posted: Sun Apr 01, 2007 9:10 am Post subject: |
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[quote="wonderb0y"]you want to put both the cylinder and the tank in the loft or just the tank? the tank is usually situated just over the cylinder, as high as possible as this will give you greater preasure.
as for the pump if you want to put a pump near the tank then you would probably need a negative head pump. it might be better to check the manufaturers instructions for how low it has to be below the tank[/quote]
Tank is alredy in the loft, I want to put the cylinder with it. Does there have to be clear space between the bottom of the cold tank and the top of the cylinder? Is there a minimum dimension between tank and cylinder? |
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wonderb0y
Joined: 17 Dec 2006
Posts: 57
Location: Leeds
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| Posted: Sun Apr 01, 2007 7:00 pm Post subject: |
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| Well as high as possible really, look at it this way, if the tank is 10 meters above the cylinder, this will only generate 1 bar of preasure, so if you have it basically sat on top of the cylinder then your preasure is going to be very weak, virtually none exsistent. |
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Chris
Joined: 07 Oct 2001
Posts: 3028
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| Posted: Sat Apr 14, 2007 10:15 pm Post subject: |
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Not so wonderboy. Pressure at the tap is the head from the header tank, - whether the cylinder is in the loft or the basement.
You should have a metre between the bottom of the CW cistern and the top of the HW cylinder. ANy less and you need big pipes and careful layout if you're to avoid trouble.
Shower pump should, put simply, be as low as possible. You do NOT need a negative head pump if the header tank is above the shower, by more than a metre or so. |
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