661—301.6 (103A) Plumbing requirements. Provisions of the state plumbing code, 641—Chapter 25, adopted by the Iowa department of public health pursuant to Iowa Code chapter 135, apply to plumbing installations in cities or which are connected to municipal water systems or municipal wastewater treatment systems.
Private sewage disposal systems shall comply with 567—Chapter 69.
	 301.6(1) Plumbing installations which are not subject to the state plumbing code, 641—Chapter 25, and which are in buildings or facilities subject to the state building code shall comply either with the state plumbing code or with the International Plumbing Code, 2006 edition, published by the International Code Council, 5203 Leesburg Pike, Suite 600, Falls Church, VA 22041, except that any assembly occupancy, restaurant, pub or lounge constructed on or after January 1, 1991, shall comply with the provisions of subrule 301.6(2) regarding the provision of minimum plumbing facilities.
If the International Plumbing Code, 2006 edition, is used, section 708.3.3 is deleted and the following new section is inserted in lieu thereof:
708.3.3 Changes of direction. Cleanouts shall be installed at each fitting with a change of direction greater than 45 degrees (0.79 rad) in the building sewer, building drain and horizontal waste or soil lines. Where more than one change of direction occurs in a run of piping, only one cleanout shall be required for each 40 feet (12 192 mm) of developed length of the drainage piping.
	 301.6(2) Places of public assembly, restaurants, pubs and lounges constructed on or after January 1, 1991, shall provide at least the numbers of plumbing facilities required in the Uniform Plumbing Code, 2000 edition, Table 4-1, published by the International Association of Plumbing and Mechanical Officials, 5001 E. Philadelphia St., Ontario, CA 91761. Additions to, or adding seating capacity in, these types of occupancies shall require the installation of additional fixtures based upon the added number of occupants unless it can be shown that the existing facilities comply for the total number of occupants including the additional occupants.
All water closets installed pursuant to this subrule shall be water-efficient water closets complying with requirements of the U.S. Department of Energy.
This subrule is intended to implement Iowa Code section 104B.1.
	 301.6(3) Fuel gas piping shall comply with the requirements established in 661—Chapter 51.