Chapter General §101. Definitions [formerly paragraph 1: 001]
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D. Thermal Expansion Control. Thermal expansion shall be controlled in accord with the following requirements. 1. If water is heated and stored in a consumer's system and the system has been closed by the installation of a backflow preventer or a pressure reducing valve, a thermal expansion control shall be installed at an accessible location between the checking device and the water heating equipment to limit thermal expansion of the water being heated to not more than 80 psi (552 kPa) static pressure at any fixture on the system. A potable water expansion tank or auxiliary relief valve set at 80 psi (552 kPa) shall be acceptable. 2. The auxiliary relief valve shall be in addition to the water heater safety relief valve. This thermal expansion control device shall be designed and trimmed for repeated operation. The valve shall be a minimum 1/2-inch pipe size, shall be adjustable and calibrated, and shall include a tag describing its function. AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20). HISTORICAL NOTE: Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 38:2845 (November 2012). §625. Miscellaneous A. Drain Cock. All storage tanks shall be equipped with adequate drain cocks. B. Line Valves. Valves in the water supply distribution system, except those immediately controlling one fixture supply, when fully opened shall have a cross-sectional area at the smallest orifice or opening through which the water flows at least equal to the cross-sectional area of the nominal size of the pipe in which the valve is installed. C. Water Used for Processing. Water used for cooling of equipment or similar purposes shall not be returned to the potable water distribution system, water service pipe, or water supply system. When discharged to the building drainage system or other point of disposal, the waste water shall be discharged through an air gap (water distribution). D. Trap Primers Connected Directly to a Potable Water System. Trap primers which connect directly to a potable water system shall comply with the following. 1. Trap primers which are connected directly to a potable water system shall be constructed with integral air gaps. In addition to the integral air gap, additional backflow protection shall be provided by the installation of either an approved air gap device on the discharge line from each trap primer, or by the installation of an approved reduced pressure principle backflow preventer on the trap primer's individual potable water supply line. 2. Trap primers (and associated air gap device and/or reduced pressure principle backflow preventer) shall be accessible and shall not be concealed by building or other construction. 3. Trap primer drains shall be constructed to completely drain by gravity after each cycle of operation and, in no case, shall the drain be connected to the trap below the top of the trap water seal or trap outlet weir. 4. Trap primer air gaps, when required, shall be located a minimum of 6 inches (152 mm) above the flood level of the floor drain or receptor served. 5. Trap primers which connect to the potable water system shall be connected to the cold water supply in accordance with the manufacturer's recommendations. 6. Separate cutoff valves shall not be installed between a trap primer and its water supply except that a cutoff valve for an individual fixture shall control both the water supply to the trap primer and the individual fixture to assure a constant supply to the primer. AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20). HISTORICAL NOTE: Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 38:2846 (November 2012). §627. Water Treatment Units A. Drinking water treatment units shall meet the requirements of NSF 42 and 53. Units are designed to be used for the reduction of specific contaminates from potable drinking water, such contaminants being considered as potential health hazards or affecting the aesthetic quality characteristics of potable drinking water. B. Reverse osmosis drinking water treatment systems shall meet the requirements of NSF 58. Systems are designed to be used for the reduction of specific contaminates from potable drinking water supplies considered to be microbiologically safe and of known quality (except that claims for the reduction of filterable cysts may be permitted). Systems covered by this standard are intended for reduction of total dissolved solids (TDS) and other contaminants specified therein. C. Waste and discharge from reverse osmosis or other types of water treatment units shall enter the drainage system through an air gap (drainage system). AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20). HISTORICAL NOTE: Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 38:2846 (November 2012). §629. Additional Water Supply and Distribution Provisions A. Additional provisions for water supply and distribution are found in the following: 1. LAC 51:XIV.609.F, Cross-Connection Control; 2. LAC 51:XIV.Chapter 13, Medical Facilities Plumbing Systems; 3. LAC 51:XIV.Chapter 15, Travel Trailers and Travel Trailer Parks; 4. LAC 51:XIV.Chapter 16, Mobile/Manufactured Homes and Mobile/Manufactured Home Parks; and, 5. LAC 51:XIV.1805, Appendix B, Sizing of Water Piping System. AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20). HISTORICAL NOTE: Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 38:2847 (November 2012). Chapter 7. Sanitary Drainage §701. General A. Scope. The provisions of this Chapter shall govern the materials, design, construction, and installation of sanitary drainage systems. B. Damage to Drainage System, Sewerage System, or Sewage-Treatment Plant. Wastes which are detrimental to, and/or able to cause damage or operational problems to, either the drainage system, the sewerage system, or the functioning of the sewage-treatment plant shall be treated and disposed of in accordance with §703.F, §1005, or an approved pretreatment system as directed by the plumbing official. C. Individual Sewerage System. Where a community sewerage system is not available, an individual sewerage system shall be of a type that is acceptable and approved by the state health officer. See Chapter 17 of this code. D. Tests. The sanitary drainage system shall be tested in accordance with §319 of this code. E. Engineered Systems. Engineered sanitary drainage and venting systems shall conform to the provisions of Chapter 12 of this code. AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20). HISTORICAL NOTE: Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 38:2847 (November 2012). §703. Materials A. General. Pipe, tubing, and fittings for drainage systems shall conform to the standards listed in Table 703 of this code. B. Specific Type. Standards listed in Table 703 of this code below apply to the specific materials approved for use and, as indicated in the various Sections in this Chapter, as they apply to the drainage system. C. Aboveground Piping within Buildings and Piping in Raceways or Tunnels. Aboveground piping within buildings and piping in raceways or tunnels shall comply with the following. 1. Soil and waste piping for drainage systems shall be of cast iron, galvanized steel, type 304 or 316L stainless steel, brass or copper pipe, type DWV copper tube, Schedule 40 plastic piping or borosilicate glass. 2. Vertical soil, waste and vent stacks shall be designed to control expansion and contraction, in accordance with accepted engineering practice, to the satisfaction of the plumbing official. D. Underground Piping Within Buildings. All underground drains within buildings shall be cast iron soil pipe, type 316L stainless steel, ductile-iron pipe, type DWV copper, heavy schedule borosilicate glass, or Schedule 40 plastic piping. Materials subject to corrosion shall be protected when installed in corrosive soils.
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