Quote Originally Posted by wiam View Post
I know guys that use black up to 27" with many thousands of taps with no problems of colapse or pull apart.
Is it black maple line or the thinner walled water (irrigation type) lines?
They used to have the black irrigation water lines up here and it didn't work too well from what I heard. Someone else told me a similar story from their camp too.

I've seen new and old of the actual maple line that pulls itself apart from season to season.

Might depend on your seasonal temp variation too. Install plastic when its 90 plus out and it pulls apart when its -12 with wind chill. I'd say 6" per 200 feet average.

I've seen the thicker maple lines suck collapsed at slight kinks and at a taped off hole for a sap line connection that was moved.

Just my experience.