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    soil stack

    i am building an extension that goes over an existing manhole. i want to replace the section of pipe in the manhole, and make use of the other 2 manholes situated on the same line either side within 3 mtrs. the manole i want to replace the pipe only houses the stack waste from my own...
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    surface water drainage

    i am building an extension at the rear of the property, and the original house never had rear surface water drainage installed. the nearet gully is at the front of the property. i cant use a soakaway due to the water table being to high. how can i avoid having to dig up metres of concrete...
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    unused man hole.

    hi, i am building an extension that involves building over one of the man hole covers. this particular man hole houses the soil pipe for my toilet only. the next manhole is 2metres away, and has a capped off inlet that i will re connect to. my question is, do i have to replace the section of...
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