Drainage issues

This photo just shows how high the retaining wall is at the back. The land isnt much lower than behind. The problem area is down the right hand side pathway.

<a href="http://s97.photobucket.com/albums/l223/ausyuppy/?action=view&current=DSC_0068smal.jpg" target="_blank"><img src="http://i97.photobucket.com/albums/l223/ausyuppy/DSC_0068smal.jpg" border="0" alt="Photobucket"></a>

The water builds up in the garden and ends up rising over the footpath towards the house. I plan on putting the drain on the left hand side against the shed and retaining wall.

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Cheers
Steve

Hi Steve,

All that looks very good and should work. I don't think you will need to sink the lid of the pit below level, as I have 2 of these things which don't really block up much. If you have a look every day or 2 and move stuff off the grate, that is enough. You could go a bit further and secure a bit of plastic mesh, like gutterguard, over the top with cableties.

Cheers

the way your levels are there i would be more inclined to put a strip drain along the length of the path, level with the path.
And possibly put an edge slightly higher to retain the garden

Its hard to see however the lowest point is in the corner of the shed slab and the retaining wall, so the water builds up from there, thats why I was considering putting the drain there.

When the water builds up the water ends up going into the sewer drain that you can see on the path and its always surrounded by bits of mulch etc. Thats why I was looking at some sort of filter to block the crap.

Down the side I have used fly screen mesh to stop the small stones goign into the drain and they sometimes get blocked up with silt / leaves etc.

I did consider one of those meter long strip drains, but it would have to be 50mm lower than the path to catch the water before it got as high as the slab the shed is on as it falls away from the house.

Cheers
Steve

Hi mate,
I followed your advice and bought a 260 x 260 x 280mm deep. Its the one in the piccy below. I installed it about 50mm below the top of the slab and slightly lower than the dirt level of the garden. Im going to install rocks around the pit, but not over it to try and eliminate mulch ending up in the drain.



I had a look for the mesh you were talking about, but couldnt find any. I assume you mean diagionally to be similar to those leaf eater down pipe things they use for water tank supplies?

I will add a photo of the job when I finish it off.

Cheers
Steve

Hey wonderplumb,
Still havent got around to getting the mesh, but I have finally got some photos to show the finished product.

The Level of the garden was at the top of the shed slab, as you can see now the level is roughly 80mm lower. Hopefully the aggregate around the drain should help with water run off from the slab and hopefully eliminate water building up and allowing mulch to float into the drain.

Cheers
Steve