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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.

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  1.  
    I was think of using a single storey side extension flat roof to store rainwater from the gutters above
    to use for a washing machine and downstairs toilet below
    I'm not sure what level I need to insulate it to, to protect it from freezing
    I was thinking of.

    25mm closed cell pipe lagging on all pipes
    150mm mineral wall surrounding tank

    does this sound enough

    thanks for your thoughts

    JIm
    • CommentAuthortony
    • CommentTimeJan 3rd 2008
     
    If you use all plastic pipes and fittings then it would not matter if it froze so you could save the cost of insulation

    A whole tank of water is unlikely to freeze solid next to a house.

    I would use 100mm expanded polystyrene sheet for the tank if pushed to choose something.
    • CommentAuthorjamesingram
    • CommentTimeJan 3rd 2008 edited
     
    thanks for that Tony

    I think I'll insulate the pipe as well though as my customer will no doubt want to
    flush when its freezing outside, and I was intending to send a water main to it for toping it up when empty
    though I need to think where to place the ball cock ,I guess a long arm on the float would do it
    unless there some way of doing that from the inside without having to turn any taps or levers

    happy new year

    Jim
    • CommentAuthortony
    • CommentTimeJan 3rd 2008
     
    Yes have the ball cock under water most of the time such that only say when the store gets below 25l will it refill to 25l.
  2.  
    Is placing the ballcock underwater OK in regards to water regs ie back-siphonage?
    If I fit a single/double check valve on the main feed will this cover that?

    jim
    • CommentAuthortony
    • CommentTimeJan 3rd 2008
     
    Not the valve only the ball goes under water.
    • CommentAuthorjamesingram
    • CommentTimeJan 4th 2008 edited
     
    go it
    I wondered what you ment
    thanks

    Jim
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