Drainage
Stormwater – Kerb Discharge
If you are going to build on an existing house block you will probably have a planning permit condition that storm water must discharge to an approved point. If there is no surface water system one option can be to…
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Rainfall Intensity
When most people think about rainfall they think about the amount of rainfall . . . . . . . . . but it’s just as important to understand how hard it can rain, the ‘Rainfall Intensity’. The ‘Rainfall Intensity’…
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Plumbing Acronyms
There are a lot of acronyms used on plumbing drawings so here are a few definitions: AG – Agricultural (Drains) B – Basin Bth – Bath BT – Boundary Trap DP – Down Pipe FW – Floor Waste HWS –…
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Underground Garage
Basement, or underground garages are becoming more popular. Its one way of getting a bigger house on a smaller inner suburban block. Before you make a decision to go for this solution its worth thinking about the cost, and the…
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Overflow Relief Gulley
Have you ever wondered what this is in your garden? Perhaps you have seen ‘ORG’ on a drawing. Well the answer is it’s called an Overflow Relief Gully. It needs to between the house and the connection to the main…
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Cubby House – Fail
What do you think of this Cubby House that someone built in their garden, soon after moving in? Well it looks pretty good…………………………. Solidly constructed building, nice colourful paint job, and securely bolted down to a convenient concrete slab. So why…
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Manhole
When I started in the drainage business 40 years ago we called them Manholes. Since then due to political correctness we have had; Person Holes, Access Points, Inspection Pits, but now we seem to be coming back to calling them…
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Charged Drainage System
Thanks to SaveH2O, of Supadiverta This diagram indicates a charged drainage system. These are sometimes called either a “wet” or a “pressure” system. With this type of system a section of the pipe always remains full unlike a Conventional System. As the…
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Conventional Drainage
The vast majority of new houses will have a conventional (sometimes called a Gravity, or Open system) storm water drainage system discharging to either: Public Surface Water Drain – Typically in Eastern States Soakwells on Sandy Sites – Mainly in…
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Roof Choice – Risk
Something you might never have thought about when thinking about the sort of roof that you want on your new house is Risk. Low Risk A conventional roof which slopes to the outside can be considered to be a low…
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