swimming pools in buffalo ny not permitted to backwash onto neighbor's
lawn.
maybe your local building inspector is your best local advisor on this
assorted drainage problem.
if mosquitoes can breed in any standing water other health problems
occur. [west nile virus, popping up in ny state]
refer to cdc website for your local risk on that.



wrote:
It is 4 inch PVC right now but it can be made smaller to just
accommodate continuous drainage as opposed to part time rainstorm
volume.

Fail to understand the logic here. Making it smaller is almost
guaranteed to increase the likelihood of a solid blockage if it does
freeze as well as making the wall proportionally thinner. Making it
larger (or adding a parallel would seem more advantageous).

There is a continual flow of water. If that can be maintained then a
one inch pipe will do good enough. If it plugs or freezes that will be
alright as long as it doesn't leak underground and cause a bog.

But, you still don't explain enough about what the water source is or
the configuration to make a rational answer of an overall solution
rather than trying to solve a specific question which is only a subset
of the actual problem.

This drainage system is a flawed system from my uphill neighbor.
(Pool backwash, Funneled backyard slope to a manhole cover,
Downspouts, Sump pump, Stupid engineering/neighbor) I don't care if it
freezes or plugs as long as it doesn't break underground and saturate
my downhill property.