Section 117

A local authority which exercises the power conferred upon it by this section shall repay to the person constructing the sewer or drain the extra expense reasonably incurred by him in complying with such requirements, and unless the sewer or drain becomes vested in such authority, it shall also from time to time repay to him so much of any expenses reasonably incurred by him in repairing or maintaining the sewer or drain, as may be attributable to its requirements having been made and complied with.

Communication of private sewers and drains with public sewers and drains.