Well another solution to tree roots is way cheaper than a new line.
have line snaked and opened.
every 3 months dissolve a 25 pound bag of rocksalt in the wash tub and
don right before going out, so the salty water lays in the line.
roots dont like salt, it kills the roots but doesnt hurt the trees.
cheap too, and this is early spring I will do mine as soon as the
washer is donre running