When any Street or Road or Sewer shall be opened, with such Consent as aforesaid, the Clauses of the Waterworks Clauses Act, 1847, with respect to breaking up Streets for the Purpose of laying Pipes, so far as the same are consistent with this Act and applicable thereto, shall be incorporated with this Act, and shall apply to the Company, and to any Ground broken by them for making any such Sewer or Drain as aforesaid to open into any existing Sewer.