NSF/ANSI 24 – 2016 pdf free download
NSF/ANSI 24 – 2016 pdf free download.Plumbing System Components for Recreational Vehicles.
2.4 burst protection: Prevention of physical damage to the potable water system by antifreeze at specified protection temperature and concentration of active ingredient. 2.5 corrosion-resistant materials: Materials that maintain their original surface characteristics under prolonged contact with the environment and chemical compounds. 2.6 drainage system: Piping that conveys body or liquid wastes to the drain outlet, excluding the sewer connector. 2.7 fixture: A receptor for water or waterborne wastes that discharges into a sanitary drainage system or waste holding tank. 2.7.1 fixture drain: The drain from a fixture’s trap or the drain outlet, or to the junction of that drain with any other drain pipe. 2.8 flood level: The level in the receptacle over which water would overlfow to the outside of the receptacle. 2.9 flush water holding tank: A tank designed to be manually filled with water that is not intended to be plumbed into a potable water distribution system. 2.10 liquid waste: The discharge from any fixture, appliance, area, or appurtenance that does not include discharges from water closets and urinals. 2.11 multiple fixture pump: A pump to deliver water to two or more fixtures. Pumps may be manually or automatically activated. 2.12 non-fouling: Free from obstruction. 2.13 recreational vehicle: A vehicular unit primarily designed as temporary living quarter for recreational, camping, travel, or seasonal use that either has its own motive power, or is mounted on or towed by another vehicle. The basic entities are travel trailer, camping trailer, truck camper, motor home, and fifth wheel trailer. 2.14 removable: Capable of being taken away from the main unit without using only simple tools (screwdriver, pliers, open-end wrench, etc.). 2.14.1 readily removable: Capable of being taken away from the main unit without using tools.
3 Materials 3.1 General Materials shall withstand exposure to the use environment, pressure requirements, corrosive actions of chemicals and water, handling and installation. 3.2 Dissimilar materials Dissimilar materials may be used, but shall be protected against electrolytic action. 3.3 Welding Welded seams and deposited weld materials shall meet the applicable corrosion resistance requirements. 3.4 Potable water contact surfaces Surfaces of components intended for potable water contact shall comply with the requirements specified in NSF/ANSI 61. 3.5 Non-corrosion-resistant materials Non-corrosion-resistant materials shall have all wetted surfaces covered with a protective coating Cathodic protection may also be used to prevent or reduce corrosion. 4 Design and construction 4.1 General Plumbing system components shall be designed and constructed to not be adversely affected by operation of the vehicle or the normal environment. 4.2 Cleanability Surfaces or parts of components requiring routine cleaning shall be readily accessible and easily cleanable when assembled or removed. Demountable parts shall be readily removable. 4.3 Backflow and back siphonage If a backflow protection device is required, it shall conform to the applicable requirements under ASME A112.18.3M. 4.4 Specific requirements for components Individual components and appurtenances shall comply with the applicable requirements of 4 through 24.4.3 except as specifically exempted.
5.1.2 Connector couplings, caps, and hoses shall be watertight after attachment to prevent leakage. 5.1.3 Drain hoses shall have a nominal 3 in diameter. Body waste drain hoses shall be designed to support attachment of connector couplings, without deformation of the inside diameter of the hose when installed according to the manufacturer’s instructions. 5.1.4 Body waste drain hoses shall be capable of being formed to not less than 90° (1.6 rad) with a 3 in radius. When formed, drain hoses shall be capable of passing a minimum 2¾ in (69.9 mm) diameter ball. 5.2 Performance System components to be tested shall be mounted to a nominal 3 in diameter standpipe with the drain opening plugged. A pressure of 3 psig (20.7 kPa) shall be applied for 5 min, with no leakage of water from the system. 5.3 Marking and identification Connector couplings, caps, and drain hoses shall be clearly and permanently marked with trade name or designation.
