Indiana Administrative Code
Title 675 - FIRE PREVENTION AND BUILDING SAFETY COMMISSION
Article 15 - INDUSTRIALIZED BUILDING SYSTEMS
Rule 2 - Indiana Mobile Structures Code
Section 2-34 - Definitions for plumbing standards
Current through March 20, 2024
Authority: IC 22-13-2-13
Affected: IC 22-12; IC 22-13; IC 22-14; IC 22-15
Sec. 34.
The following definitions are applicable to the provisions of 675 IAC 15-2-32-675 IAC 15-2-70:
"Air gap (water distribution system)" means the unobstructed vertical distance through the free atmosphere between the lowest opening from any pipe or faucet supplying water to a tank, plumbing fixture, water supplied appliance, or other device and the flood level rim of the receptacle.
"Anti-siphon trap vent device" means a device which automatically opens to admit air to a fixture drain above the connection of the trap arm so as to prevent siphonage, and closes tightly when the pressure within the drainage system is equal to or greater than atmospheric pressure so as to prevent the escape of gases from the drainage system into the mobile structure.
"Backflow" means the flow of water or other liquids, mixtures, or substances into the distributing pipes of a potable supply of water from any source or sources other than its intended sources.
"Backflow connection" means any arrangement whereby backflow can occur.
"Backflow preventer" means a device or means to prevent backflow.
"Branch" means any part of the piping system other than a riser, main or stack.
"Common vent" means a vent connecting at the junction of fixture drains and serving as a vent for more than one (1) fixture.
"Continuous vent" means a vertical vent that is a continuation of the drain to which it connects.
"Continuous waste" means a drain from two (2) or more fixtures connected to a single trap.
"Critical level" means the C-L or C/L marking on a backflow prevention device or vacuum breaker is a point established by the testing laboratory (usually stamped on the device by the manufacturer) which determines the minimum elevation above the flood level rim of the fixture or receptacle served on which the device may be installed. When a backflow prevention device does not bear a critical level marking, the bottom of the vacuum breaker, combination valve, or of any such approved or listed device shall constitute the critical level.
"Cross connection" means any physical connection or arrangement between two (2) otherwise separate systems or sources, one of which contains potable water and the other either water, steam, gas, chemical or unknown or questionable materials whereby there may be a flow from one (1) system or source to the other, the direction of flow depending on the pressure differential between the two (2) systems.
"Developed length" means that length of pipe measured along the center line of the pipe and fittings.
"Diameter" means the nominal (inside) diameter designated commercially, unless specifically stated otherwise.
"Drain" means a pipe that carries waste, water, or water-borne wastes in a drainage system.
"Drain connector" means the removable extension, consisting of all pipes, fittings and appurtenances, from the drain outlet to the drain inlet serving the mobile structure.
"Drain outlet" means the lowest end of the main or secondary drain to which a sewer connection is made.
"Drainage system" means all piping within or attached to the structure that conveys sewage or other liquid waste to the drain outlet, not including the drain connector.
"Fixture drain" means the drain from the trap of a fixture to the junction of that drain with any other drain pipe.
"Fixture supply" means the water supply pipe connecting a fixture to a branch water supply pipe or directly to a main water supply pipe.
"Flood level" means the level in the receptacle over which water would overflow to the outside of the receptacle.
"Flooded" means the condition which results when the liquid in a container or receptacle rises to the flood-level.
"Flush tank" means that portion of a toilet that is designed to contain sufficient water to adequately flush the fixture.
"Flush valve" means a device located at the bottom of a flush tank for flushing a toilet.
"Flushometer valve" means a device which discharges a predetermined quantity of water to a fixture for flushing purposes and is closed by direct water pressure.
"Grade" means the fall (slope) of a pipe in reference to a horizontal plane expressed in inches per foot length.
"Horizontal branch" means a drain pipe extending laterally, which receives the discharge from one or more fixture drains and connects to the main drain.
"Horizontal pipe" means any pipe or fitting which makes an angle of more than forty-five degrees (45 °) with the vertical.
"Individual vent" means a pipe or anti-siphon trap vent device installed to vent a fixture drain.
"Inlet coupling" means the terminal end of the water system to which the water service connection is attached. It may be a swivel fitting or threaded pipe end.
"Main" means the principal artery of the system to which branches may be connected.
"Main drain" means the lowest pipe of a drainage system which receives sewage from all the fixtures within a mobile structure and conducts these wastes to the drain outlet.
"Main vent" means the principal artery of the venting system to which vent branches may be connected.
"Offset" means a combination of pipe and/or fittings that brings one section of the pipe out of line but into a line parallel with the other section.
"Pitch". (See "grade".)
"Plumbing fixtures" means receptacles, devices, or appliances which are supplied with water or which receive liquid-borne wastes for discharge into the drainage system.
"Plumbing system" includes the water supply and distribution pipes; plumbing fixture and traps; soil, waste, and vent pipes; and water-treating or water using equipment.
"Primary vent". (See "main vent".)
"Relief vent" means an auxiliary vent which permits additional circulation of air in or between drainage and vent systems.
" Secondary vent" means any vent other than the main vent or those serving each toilet.
"Sewage" means any liquid waste containing animal or vegetable matter in suspension or solution, and may include liquids containing chemicals in solution.
"Siphonage" means the loss of water seal from fixture traps resulting from partial vacuum in the drainage system which may be of either of the following two types, or a combination of the two:
(a) Self-siphonage resulting from vacuum in a fixture drain generated solely by the discharge of the fixture served by that drain, or,
(b) induced siphonage resulting from vacuum in the drainage system generated by the discharge of one (1) or more fixtures other than the one under observation.
"Toilet-mechanical seal" means a toilet fitted with water-flushing device and mechanically sealed trap.
"Toilet-recirculating chemical" means a self-contained, circulating toilet in which the waste is chemically treated.
"Trap" means a fitting or device designed and constructed to provide a liquid seal that will prevent the back passage of air without materially affecting the flow of liquid waste through it.
"Trap arm" means that portion of a fixture drain between a trap and its vent.
"Vacuum breaker". (See "backflow preventer".)
"Vent caps" means a device or fitting which protects the vent pipe from foreign substances with an opening to the atmosphere equal to the area of the vent it serves.
"Vent system" means that part of a piping installation which provides circulation of air within a drainage system.
"Vertical pipe" means any pipe or fitting which makes an angle of forty-five degrees (45 °) or less with the vertical.
"Water connection" means the fitting or point of connection for the mobile structure water distribution system designed for connection to a water supply.
"Water connector" means the removable extension connecting the mobile structure distribution system to the water supply.
"Water distribution system" means the potable water piping within or permanently attached to the mobile structure.
"Wet vent" means a vent which also serves as a drain for one or more fixtures.
"Wet vent drainage system" means a specially designed system of drain piping that also vents one or more plumbing fixtures by means of a common waste and vent pipe.
