Plumbing Dictionary
Plumbing termonalogy.
Browse the glossary using this index
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EFFECTIVE OPENINGThe minimum cross-sectional area at the point of water supply discharge, measured or expressed in terms of the diameter of a circle or, if the opening is not circular, the diameter of a circle of equivalent cross-sectional area. For faucets and similar fittings, the effective opening shall be measured at the smallest orifice in the fitting body or in the supply piping to the fitting |
ESCUTCHEONAny decorative threaded flange below or behind a faucet handle. Also an ornamental plate used at the base of a faucet to cover additional holes on a lavatory or kitchen sink. |
ESSENTIALLY NONTOXIC TRANSFER FLUIDSFluids having a Gosselin rating of 1, including propylene glycol; mineral oil; polydimethylsiloxane;Â hydrochlorofluorocarbon, chlorofluorocarbon and hydrofluorocarbon refrigerants; and FDA-approved boiler water additives for steam boilers. |
ESSENTIALLY TOXIC TRANSFER FLUIDSSoil, waste or gray water and fluids having a Gosselin rating of 2 or more including ethylene glycol, hydrocarbon oils, ammonia refrigerants and hydrazine. |
EXCESS AIRAir which passes through the combustion chamber and the appliance flues in excess of that which is theoretically required for complete combustion. |
EXISTING INSTALLATIONSAny plumbing system regulated by this code that was legally installed prior to the effective date of this code, or for which a permit to install has been issued. |
EXPOSED PIPINGGas piping which will be in view in the finished structure. |