Hi all

 

i need to do a percolation test to satisfy building control my soakaway design is large enough.

 

my inlet pipe is going to be approx 800mm below ground level (image attached)

 

so if I dig 1000 deep and 0.30mm x 0.30mm

 

and measure the rate of drainage from 750mm down to 250mm

 

just checking I have the calculation correct so hypothetically it takes 120 seconds to drain

 

Calc for VP value will be 120\500mm =50 

 

and repeat 3 times per trial hole?

 

 

Edited August 22Aug 22 by PSC88
Image needed adding

That maths is out, 120 divided by 500 is 0.24 not 50. And yeah, three runs per hole then average them, and soak the hole first so the ground is wet through before you time it.