For the purposes of this Q&A we have assumed that the statutory undertaker is a sewerage undertaker. This Q&A is relevant where the apparatus is in England. Power to lay pipes The Water Industry Act 1991 (WIA 1991) gives a water or a sewerage undertaker a statutory right to lay pipes above or below ground, and grants rights of access onto private land for inspection, maintenance and alterations under WIA 1991, s 159; see Practice Note: Statutory wayleaves and rights of access. In establishing whether this section applies, 'relevant pipe' for these purposes includes a water main, a service pipe and a main sewer, although powers to lay service pipes are more restricted. For definitions of these terms we refer you to WIA 1991, s 219. For these purposes, WIA 1991, s 219(2) provides that references to a pipe, including