CHAPTER 18 MATERIALS

Transcription

1 PlumbingCode06_ch18 5/29/06 8:22 AM Page 1 CHAPTER 18 MATERIALS Materials approved for private sewage systems must meet certain code requirements. For example, the code requires the manufacturer s mark or name and the quality of the product or identification to be cast, embossed, stamped, or indelibly marked on each length of pipe and each pipe fitting, fixture, tank, material, and device used in a private sewage disposal system in accordance with approved standards. And, all tanks must be marked with their capacity. All workmanship and materials used in the installation of a sewage disposal system must be done in a code-approved manner. TANKS Septic tanks must have floors and sidewalls of a site-constructed concrete tank of a monolithic type, except a construction joint is permitted in the lower 12 inches of the sidewalls of the tank. If a construction joint is used, it must have a keyway in the lower section of the joint. The width of such a keyway must be approximately 30 percent of the thickness of the sidewall with a depth equal to the width. A continuous water stop or baffle must have a minimum width of 56 inches. It is to be set vertically in the joint and embedded one-half of its width in the concrete below the joint with the remaining width in the concrete above the joint. The baffle must be made from copper, neoprene, rubber, or polyvinyl chloride that is designed for the specific purpose. Joints between a concrete tank and a tank cover and between a tank cover and a manhole riser must be of a tongue-and-groove or shiplap type. The joint must be sealed water tight with the use of cement, mortar, or a bituminous compound. 18.1

2 PlumbingCode06_ch18 5/29/06 8:22 AM Page INTERNATIONAL PLUMBING CODES HANDBOOK Fastfact The manufacturer s mark or name and the quality of the product must be marked on each length of pipe and each device used in a private sewage disposal system. Steel and Fiberglass Tanks Steel tanks must conform to UL 70. Damage to the bituminous coating shall be repaired by recoating the tank. Tank capacity and design specifications can be established by checking the table in your local code book. Fiberglass tanks must conform to ASTM D TABLE 18.1 Tank capacity. Copyright 2006, International Code Council, Inc., Falls Church, Virginia. Reproduced with permission. All rights reserved.

3 PlumbingCode06_ch18 5/29/06 8:22 AM Page 3 MATERIALS 18.3 Tradetip The collars for manholes and their extensions must be made from the same material as the tanks that they are being used with. Manholes The collars for manholes and their extensions must be made from the same material as the tanks that they are being used with. Manhole covers are to be made of concrete, steel, cast iron, or some other approved material. PIPE JOINTS AND CONNECTIONS Pipes for private sewage disposal systems are required to have a smooth wall and to confirm to standards found in a table within your local code book. Joints and connections must be made with an approved type of material or in an approved manner. Some examples can be seen below: Mechanical joints on drainage pipes must be made with elastomeric seals of an approved type. Mechanical joints are allowed only on underground plumbing, except as otherwise approved. Solvent cement joints must be made on clean, dry surfaces. Solvent cement joints may be made below ground or above ground. Asbestos-cement pipe joints must be made with a sleeve coupling of the same material composition as the pipe and sealed with an elastomeric ring. Cast-iron pipe joints must be made in an approved manner. Lead joints for cast-iron pipe with hub-and-spigot pipe must be firmly packed with oakum or hemp. Then, molten lead is poured in a single operation to a depth of not less than one inch. The lead must not recede more than inch below the rim of the hub and shall be caulked tight. Joints made with cast-iron pipe must be tested and approved before they can be painted or varnished. Compression joints, of an approved type, can be used to join cast-iron pipe. Concrete pipe joints are to be made with elastomeric seals. Soldered joints must be made in an approved manner. All cut ends of pipe for these joints must be reamed to the full inside diameter of the pipe or tube. Flux and solder used in the connection must be of an approved type.

4 PlumbingCode06_ch18 5/29/06 8:22 AM Page INTERNATIONAL PLUMBING CODES HANDBOOK TABLE 18.2 Private sewage disposal system pipe. Copyright 2006, International Code Council, Inc., Falls Church, Virginia. Reproduced with permission. All rights reserved.

5 PlumbingCode06_ch18 5/29/06 8:22 AM Page 5 MATERIALS 18.5 Heat-fusion joints must be made on surfaces that are clean and dry. The joint surfaces are to be heated to melting temperature and joined. Then, the joint must be left undisturbed until it cools. Joints between different types of plumbing materials must be made with a mechanical joint of the compression or mechanical sealing type. All pipe and joint installations must be made in accordance with the local plumbing code. Prohibited Joints Prohibited joints include the following: Cement or concrete joints Mastic or hot-pour bituminous joints Joints made with fittings that are not approved for the type of joint being made Joints made with elastomeric rolling O-rings between different pipe diameters Solvent-cement joints between different types of plastic pipe USING THE RIGHT MATERIALS Using the right materials and procedures when installing plumbing can save you both time and money, not to mention embarrassment. It is always more professional and more profitable to do a job only once. If you have to tear out unapproved materials and install new materials due to a lack of understanding of the code, you will find it makes sense to know what you are allowed to install and how to install it.

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