It could be any depth.
In your neighbours manhole the pipe may run parallel with the back of the houses, that would give you an idea of depth.
I personally wouldn't ask anyone for permission, I'd be more concerned with getting rid of the water.
I think any soakaway would soon be overwhelmed.
In your neighbours manhole the pipe may run parallel with the back of the houses, that would give you an idea of depth.
I personally wouldn't ask anyone for permission, I'd be more concerned with getting rid of the water.
I think any soakaway would soon be overwhelmed.