I am installing a 1-1/2 inch vertical pipe, which will be connected to a horizontal 1-1/2 inch pipe by a 90 degree elbow. This is at a high point in the system. Would it be acceptable plumbing practice to substitute a 1-1/2 tee for the 1-1/2 elbow, for the pupose of putting in an auto air vent. Or would it be better to have the elbow followed immediately by a tee for the air vent? Maybe it makes no difference.
Mike
Mike