Iowa Code § 137C.16: Plumbing.

1. A hotel shall have an adequately designed plumbing system conforming to at least the minimum requirements of the state plumbing code. The plumbing system shall have a connection to a municipal water and sewerage system or to a benefited water district or sanitary sewerage district whenever such facilities become available.

2. A hotel beyond the reach of a central water or sewerage system shall be served by on-site facilities which meet the technical requirements of the local board of health and the department of natural resources.