vfr12
MOTORC*NT
Either reuse the water or don’t. If you zoom in , you’ll see holes on the barrel.If the top of that water is even half an inch higher than your drain, then you'll be grand. If it's not, you're fooked mate.
Presume that drum isn't sealed and is there to give the gravel a head start over a traditional soakaway?
Seems a bit pointless unless there's some sort of mechanism to pump the water out? Presume there is?
@stuart23 dont forget to vent the drainage.