NSF ANSI 24:2016 pdf free download – Plumbing System Components for Recreational Vehicles
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.
6.1 Scope
This section covers side-vented drainage systems installed in a recreational vehicle. Systems shall not reduce the flow below that which may pass through a basket strainer for a nominal 2 in sink opening. The same area used for liquid waste shall be used for air and venting purposes.
6.2 Materials
Components shall be manufactured of materials accepted for use in a drain, waste, and vent system (DWV) listed under NFPA 1192.
6.3 Design and construction
Systems shall be constructed of a minimum nominal 1.25 in diameter plastic pipe or drawn brass tubing at least a nominal 1.5 in diameter No. 20 Browne and Sharp gauge. A diverter or directional tee shall be used to connect the trap to the side-vented system, with a two-compartment sink. This equipment shall have no more than a nominal 2.0 in 50.8 mm) drain opening.
6.3.1 Drain outlet shall be a nominal 1½ in minimum IPS (iron pipe size), and contain a male or female IPS pipe thread.
6.3.2 A minimum nominal 1¼ in P trap shall be used in the side-vented system. It may be constructed of No. 20 Browne and Sharp gauge drawn brass tubing or accepted plastics. Wall thickness, socket depth, type, and grade of plastic materials shall comply with the applicable requirements in NSF/ANSI 14.
6.3.3 The baffle or diverter tee shall be manufactured of materials referenced in NFPA 1192, Section
6.3.2. It shall be designed to direct water down. It shall contain no crevices or cavities that will trap or hold waste particles.