Tanks are rotomolded and the design often reflects the easiest option in the manufacturing process. I prefer a flat screen because a sloped screen can build up debris at the…

No difference with the hydraulics as any possible head pressure in the standing pipe is generated by pressure, not weight.
Just be aware that 90mm pvc stormwater pipe is flimsy…

The time of year and those pesky South Polar Jet Streams that have been extending up to the Australian southern coast wouldn't have helped.

No, I am saying that you can also heat and slightly bend the pipe so it is the final adjustment to the required slope after fitting a 15 degree bend…

A single 45 degree elbow will still be pointing downwards when fitted to the bottom of a vertical pipe. Think of it as a 135 degree elbow.
Just be aware…

My concern would be whether it would promote rot but woodwork is not my forte. What sort of wood is it?
You need two 45s for every 90. …

I'm not sure what you can do about the waterlogged base issue. I am loath to suggest drilling holes in the wood which only leaves digging a trench and laying…

You would need to convert the 90mm pvc stormwater pipe to pvc DWV pipe because (DN) 90mm pvc stormwater pipe is the smallest size.
Doing this is easy as you…

Subsurface stormwater minimum pipe slopes (in Australia) with nominal diameters of:
90mm, 100mm and 150mm-- 1:100.
225mm-- 1:200.
300mm-- 1:250.
375mm-- 1:300
It has to be noted that stormwater pipes also drain surface areas…

Lisa06
You could do the spoon drain as a first step then if that is not diverting enough water then consider a cut off drain.
I think you should get an…

groundzero Could you please share your thoughts on the following:

If we installed a cut off drain along the neighbour's entire fence line (in…

Yes, it looks amazing, but we won't be paying for that. Surface drainage on highly reactive soil is the responsibility of the builder.
Only untill they hand over. After that…

This the best one I have ever seen !!!
It's difficult to tell from the photo but the concrete slopes towards the drains away from the house.
It has the edge…

The other thing is not having temporary downpipes during construction not all builders do it

You can grade it away from the building envelope, how do you think they know where to put piers in and the
plumbing in before the slab is put down.
Have…

I agree that a cutoff drain would be better than a spoon drain near our neighbour’s fence line.
What is the difference between fill versus natural topsoil over natural clay? A…

I cut off drain near your neighbours fence line would be better than a spoon drain as a cut off drain can do both surface and subsurface.
You need to see…

Write reply...This could be one option without connecting to the stormwater system. You could angle the animal paddock cut off drain so you don't need to deepen the trench as…

Great diagram - thank you.
So are you saying the trench could be backfilled with soil (+ sand/gravel) and we could omit the agi pipe? How would we get the water…

Write reply...