Provided always, That it shall not be lawful for the Company to remove or displace any of the Mains or Pipes (other than private Service Pipes), Syphons, Plugs, or other Works belonging to any such Company or Society, or to do any thing to impede the .Passage of Water or Gas into or through such Mains or Pipes, until good and sufficient Mains or Pipes, Syphons, Plugs, and all other Works necessary or proper for continuing the Supply of Water or Gas as sufficiently as the same was supplied by the Mains or Pipes proposed to be removed or displaced, shall, at the Expence of the Company, have been first made and laid down in lieu thereof, and be ready for Use, in a Position as little varying from that of the Pipes or Mains proposed to be removed or displaced as may be consistent with the Construction of the Railway, and to the Satisfaction of the Surveyor or Engineer of such Water or Gas Company or Society, or, in case of Disagreement between such Surveyor or Engineer and the Company, as a Justice shall direct.