I don't know if my rain water drainage is to a soakaway.
Having just unblocked a rainwater down pipe at the top where it met the
guttering, and found it full of mud and moss (our North facing roof seems to
be almost a 'green roof' - there is moss growing around nearly every tile) I
was pondering on how much crap had gone down the pipe before it became
Which led me to pondering about soak aways in general.
If you keep washing muck down into them they must silt up eventually.
So how do you deal with this?
Should there be a gulley and 'U' trap before the soakaway to catch rubbish
which can then be removed?
Or do you have to plan to dig the garden up every 20 years or so and clean
out the soakaway?
Once, I made a hollow chamber soakaway with a paving slab base, brick wall
with gaps between some bricks and paving slabs sitting on top. This was in a
lawn 4" under the surface, so if one remembered where it was, it was a
fairly simple matter to lift the sod and clean it. However, it would take a
lot of blocking up being a chamber type.
Can't do that here as there's clay 12-18" down so not much depth of soil to
drain into. I'm thinking of burying long lengths of perforated pipe 12" down
or just above the clay layer. In that case I will certainly be installing u-
traps with access lids as perforated tube will block relatively easiliy and
be nearly impossible to clear.
My MIL's house built in the 30's seems to have recently blocked its soakaway
from the porch.
The plan is to cut into the downpipe and insert a diverter to pipe the
rainwater down the side of the house and into the outside drain where the
kitchen and bathroom grey water pipe outfalls are.
That's the plan anyway.
Check what the MIL's water board are charging here for. If it
includes surafce water in the sewerage charge fair enough but if not
the bill could increase (if they found out...). Or if there is no
surface water entering the sewage system she might be entitled to a
reduction in the bill...
Errr.....which particular plans would these be?
I don't have any for my 1930s semi.
Are you saying that someone else will hold a set of definitive plans?
Including any changes to soakaways since the 1930s?
Building control SHOULD have them.
But if its that old..dig up and mark the location on a new plan, and
file the plan with the house deeds!
Normally, when a soakaway is full of mud, it hardly matters where it is,
because you are faced with a complete dig up and make new situation anyway.
so get digging new drains!
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