An Aerobic Wastewater Treatment System will be located about 125 meters (410 Ft) away and about 50 meters (165 Ft) down, from where the residence is located. That would result, if straight forward connected, in a drainage slope of about 22°. Any problems with such a connection? (Speed at the bottom etc.).

Any other considerations to observe?

Thank you

The correct slope is 1/4" to the foot. Not enough slope will not allow the solids to be carried and too much slope will allow the liquid to drain so fast it will leave solids behind. How about locating the system closer and up the hill? Let me know, tom

Thanks Tom,
Your comment is right, unfortunately I cannot bring the tank closer to the residence. Just think at a non vertical soil stack. Would a stack with this slope work?

Out of that 410 feet how much of it can you run at 1/4" to the foot before you run out of ground and have to increase the fall? Cheers Tom

That's about it. The rocky slope starts and no possible digging until the bottom.
I was hoping to find a solution before start blasting my way into the rock.
Thanks, Maurice