Section 62-04-07-08 - Water supply control valves1.Valves in dwelling units. All water closets and kitchen sinks shall have individual fixture valves installed. Valves must also be installed for each bath, shower, powder room, or fixture group. A group of fixtures means two or more fixtures adjacent to each other in the same family unit, but not necessarily in the same room. In a one family unit, one or two bathrooms back to back or one over the other may be considered a group. However, in each dwelling unit with two or more bathroom groups not adjacent to each other, one or more control valves or individual fixture valves shall be provided so that each group may be isolated from the other. In more than single family dwelling units, one or more control valves shall be provided so that the water to any plumbing fixture or group of fixtures in any one dwelling unit may be shut off without stopping flow of water to fixtures in other dwelling units. These valves shall be accessible inside the building unit controlled.
2.Riser valves. Except in single family dwellings a valve shall be installed at the foot of each water supply riser. In multistory buildings a valve shall be installed at the top of each water supply downfeed pipe and also at the base where required to isolate this riser for servicing. 3.Individual fixture valves. In occupied buildings other than dwellings, the water service line to each fixture or other piece of equipment shall be provided with a valve or fixture stop to shut off the water to the fixture or to the room in which it is located. Except in single family dwellings, sill cocks and wall hydrants shall be separately controlled by a valve inside the building. 4.Valve to be accessible. All water supply control valves shall be placed so as to be accessible for service and maintenance. 5.Control valve design. Except to single fixtures, control valves on all water lines shall when fully opened have a cross sectional area not less than eighty-five percent of the cross sectional area of the line in which they are installed. General Authority: NDCC 43-18.1-03
Law Implemented: NDCC 43-18.1-04
N.D. Admin Code 62-04-07-08