Louisiana Administrative Code
Title 51 - PUBLIC HEALTH-SANITARY CODE
Part XIV - Plumbing
Chapter 3 - General Regulations
Section XIV-313 - Types of Joints

Universal Citation: LA Admin Code XIV-313

Current through Register Vol. 50, No. 9, September 20, 2024

A. Tightness. Joints and connections in the plumbing system shall be gastight and watertight for the pressure required by test, with the exceptions of those portions of perforated or open-joint piping which are installed for the purpose of collecting and conveying ground or seepage water to the underground storm drains.

B. Threaded Joints. Threaded joints shall conform to ASME B 1.20.1. All burrs shall be removed, pipe ends shall be reamed or filed out to size of bore, and all chips shall be removed. Pipe-joint cement and sealing compound shall be used only on male threads and be insoluble and nontoxic. All pipe-joint sealants for use on potable water piping shall be listed and labeled by an approved testing laboratory.

C. Wiped Joints. Joints in lead pipe or fittings, or between lead pipe or fittings and brass or copper pipe, ferrules, solder nipples, or traps, shall be full-wiped joints. Wiped joints shall have an exposed surface on each side of a joint not less than 3/4-inch (19.1 mm) and at least as thick as the material being jointed. Wall or floor flange lead-wiped joints shall be made by using a lead ring or flange placed behind the joints at wall or floor. Joints between lead pipe and cast iron or steel shall be formed by means of a caulking ferrule, soldering nipple, or bushing.

D. Flexible Couplings. Flexible couplings may be used to join plain ends of similar or dissimilar pipes and the flexible coupling shall consist of an approved gasket that is attached to the pipe with special adjustable stainless steel clamps and bolts (see §711. D of this code). The flexible couplings and the approved gasket shall be oil resistant.

E. Precast Joints. Precast collars shall be formed on the spigot and in the bell of the pipe in advance of use. Materials shall be resistant to acids, alkalies and oils, and precast joints shall conform to the requirements of ASTM C 425, and upon installation shall be tested as provided in this code.

F. Cement Mortar Joints and Connections. The following applies to cement mortar joints and connections.

1. Except for repairs and connections to existing lines constructed with such joints, cement mortar joints are prohibited.

2. Where permitted, cement mortar joints shall be made in the following manner: A layer of jute or hemp shall be inserted into the base of the annular joint space and packed tightly to prevent mortar from entering the interior of the pipe or fitting. Not more than 25 percent of the annular space shall be used for jute or hemp. The remaining space shall be filled in one continuous operation with a thoroughly mixed mortar composed of one part cement and two parts sand, with only sufficient water to make the mixture workable by hand. Additional mortar of the same composition shall then be applied to form a one to one slope with the barrel of the pipe. The bell or hub of the pipe shall be swabbed to remove any mortar or other material which may have found its way into such pipe.

G. Burned Lead Joints. Burned (welded) lead joints shall be lapped and the lead shall be fused together to form a uniform weld at least as thick as the lead being jointed.

H. Joints for Plastic Pipe and Fittings. The following applies to joints for plastic pipe and fittings.

1. ABS and PVC pipe and fittings shall be solvent cemented using the proper cement recommended for the particular materials. All pipe cuts shall be square and both pipe and fittings shall be cleaned of all soil, dirt, oil and grease before applying primer or cement. Solvent joints made for pressure applications shall use primers and cements that are in compliance with the applicable ASTM standards. All solvent joints shall be made in accordance with the applicable ASTM standards and shall be allowed to dry before testing. Should any leak occur on water test, the defective joint shall be replaced. All solvent cements and primers shall comply with requirements of the NSF 14 and shall be labeled to identify the laboratory certifying compliance for the particular cement and primer being used.

2. Plastic pipe and fittings for sewer and water pressure lines may also be joined by use of elastomeric joints when the respective standards for the materials so specify. Joints shall conform to the standards listed in either Table 603 or Table 703 of this code, as applicable, for elastomeric joints.

I. Grooved or Plain End Mechanical Couplings and Fittings. Grooved or plain end mechanical couplings and fittings may be used. Pipe is to be prepared in accordance with manufacturer's specifications.

J. Water Supply and Distribution Systems. Additional provisions for water supply and distribution systems are located in §619 of this code.

K. Sanitary Drainage Systems. Additional provisions for sanitary drainage systems are located in 709.

AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20).

Disclaimer: These regulations may not be the most recent version. Louisiana may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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