Onsite Stormwater Dention – Why

flooding

If you want to redevelop or subdivide an existing urban block, you might find that a planning condition is that you will need to provide On-site Stormwater Detention (OSD).

You may also find it is a condition on individual blocks on smaller subdivisions.

Why Is Onsite Stormwater Detention Needed?

Before development of towns and cities [read more...]

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Stormwater – Kerb Discharge

Stormwater Outlet - kerb

If you are going to build on an existing block you will probably have a planning permit condition that stormwater must discharge to an approved point.

If there is no surface water system one option can be to discharge to the street.

This is normally by constructing a proper kerb outlet like the photo below:

[read more...]

Rainfall Intensity

Heavy rain

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’ is important when thinking about things like; Roof Gutters, Down Pipes, Stormwater Pipes , Tank [read more...]

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

HWS – Hot Water Service

IC – [read more...]

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Underground Garage

basement 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 risk.

Cost

They aren’t a cheap solution for a few reasons:

There is a [read more...]

Overflow Relief Gulley

ORG

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 sewer.

An ORG is a vital part of protecting your house against Sewage blockages [read more...]

Cubby House – Fail

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 is it a Fail?

Well have a look at this close up of [read more...]

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Manhole

Manhole Cover

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 Manholes.

We are not talking about the small inspection covers less than 300mm across [read more...]