Thanks for the responses,
Theo you are correct in that I don't want the pond backflowing into field tile.
I may just block off the tile when the pond gets to their level, or go with running the tile to a catch basin if the field gets to wet.
PS I am not worried about chemicals draining into the pond from the tile, it just drains horse pasture and my hayfield which I really dont put any chemicals on.
Thanks again,
Mike
