- I. D.:
- Inside Diameter - All pipes are sized according to there inside diameter.
- Immersion:
- A term referring to something submerged in water.
- Impeller:
- Rotating wheel with vanes found inside a centrifugal pump. As it spins at high speed it draws fluids in and thrusts them under pressure to the discharge outlet.
- Incoming Inlet Temp:
- Temperature of water entering the tank.
- Incomplete Combustion:
- A product of inadequate ventilation which restricts the flow of air into an appliance. This may lower oxygen content in the surrounding air.
- Indirect Wastes:
- Waste pipe used to convey gray water by discharging it into a plumbing fixture such as a floor drain.
- Induction Motor:
- The most common type used in industry. Has a slippage of 2 to 5 percent compared to synchronous motors.
- Influent:
- The stream entering a unit, stream or process, such as the hard water entering an ion exchange water softener.
- Injection:
- The drawing of primary air into a gas burner by means of a flow of fuel gas.
- Inlet:
- An entrance, opening, or aperture for the intake of fluid or gas
- In-line Pump:
- Small pump which pumps fluid through a line on which it is supported and mounted.
- Input:
- The amount of fuel used by a water heater in a given period of time.
- Input Rate:
- The quantity of heat or fuel supplied to an appliance, expressed in volume of heat units per volume of time.
- Input Rating:
- the gas burning capacity of an appliance in BTU's per hour as specified by the manufacturer.
- Insanitary:
- So unclean as to be a likely cause of disease.
- Inserts:
- Faucet handles.
- Insert Fittings:
- Fittings equipped with external, annular rings for gripping, which are inserted into flexible rubber or plastic tubing as a connection.
- Instantaneous Water Heater:
- Type of water heater which heats supply as it passes through no storage tank necessary. Also known as a tankless heater.
- Insulated coupling:
- Also known as a dielectric coupling. Normally a galvanized steel coupling internally coated with ABS plastic to stop direct electrical current from passing through the pipe. Also used to connect dissimilar metal piping together to stop electrolysis or a chemical reaction. Example: connecting copper and galvanized.
- Integral:
- A cast or formed part of a fixture. such as a bubbler, trap ,seat, or tank.
- Ion:
- An atom or group of atoms which function as a unit, and have a positive or negative electrical charge, due to the gain or loss of one or more electrons.
- Ion Exchange:
- A reversible process in which ions are released from an insoluble permanent material in exchange for other ions in a surrounding solution; the direction of the
exchange depends upon the affinities of the ion exchanger for the ions present, and the concentrations of the ions in the solution.
- Ionization:
- The process in which atoms gains or lose electrons; sometimes used as synonymous with dissociation, the separation of molecules into charged ions in solutions.
- IPS:
- Iron Pipe Size - Standard pipe threads. Female IPS is internal pipe threads, male IPS are external pipe threads. Also known as NPT or NPS.
- Island Vent:
- An air admittance valve.
- ISO:
- International Organization for Standardization based in Geneva Switzerland. Among the many standards is issues are pump and seal standards for the metric community.
- Isolation Mount:
- The four small rubber feet located beneath a whirlpool's pump base, or attached to the pulse canister assemblies, designed to reduce noise and vibration
when the whirlpool is running.
- Instantaneous Water Heater:
- A type of water heater that heats water as it flows through a heat exchanger coil.
- Insular:
- Kohler's registered trade name for factory-installed insulation, which minimizes condensation on the outside of the tank when exposed to high humidity.
- Integral Stops:
- Stops that allow the owner to shut off water supply at the faucet for maintenance without shutting off the water supply to the entire house.
- Integral Vacuum Breaker:
- A device typically used in a sink or shower sprayer to keep water from backflowing into the fresh water supply.
- Interceptor:
- Device for separating grease and oil from drainage systems..
- Isothermal:
- Action that takes place with no change in temperature.
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