Pipe capacity - Designing a domestic soakaway

[goodd1]

I have a roof area of about 180 square metres and am installing soakaways. It would be most convenient to join all the drains in to one 110mm pipe and have one large soakaway at the bottom of the garden, as opposed to having two soakaways.

The garden slopes away from the house, and the preferred location for the soakaway is about 20m from the house and 2m lower.

Is a 110mm pipe going to have sufficient capacity to cope under storm conditions?

Any advice gratefully received.

[lutonlagerlout]

yes
4M 3 soakaway will work
LLL