Plumbing Dictionary


Plumbing termonalogy.

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P

PLUMBING APPLIANCE

Anyone of a special class of plumbing fixtures intended to perform a special function. Included are fixtures having the operation or control dependent on one or more energized components, such as motors, controls, heating elements, or pressure- or temperature-sensing elements. Such fixtures are manually adjusted or controlled by the owner or operator, or are operated automatically through one or more of the following actions: a time cycle, a temperature range, a pressure range, a measured volume or weight.

PLUMBING APPURTENANCE

A manufactured device, prefabricated assembly or an on-the-job assembly of component parts that is an adjunct to the basic piping system and plumbing fixtures. An appurtenance demands no additional water supply and does not add any discharge load to a fixture or to the drainage system.

PLUMBING FIXTURE

A receptacle or device that is either permanently or temporarily connected to the water distribution system of the premises and demands a supply of water there from; discharges waste water, liquid-borne waste materials or sewage either directly or indirectly to the drainage system of the premises; or requires both a water supply connection and a discharge to the drainage system of the premises.

PLUMBING SYSTEM

Includes the water supply and distribution pipes; plumbing fixtures and traps; water-treating or water-using equipment; soil, waste and vent pipes; and sanitary and storm sewers and building drains, in addition to their respective connections, devices and appurtenances within a structure or premises.

POINT OF DELIVERY

The initial junction of the consumers' piping with either the gas company piping extending from the gas main and/or the regulator which reduces the pressure of the undiluted liquefied petroleum gas to the pressure normally delivered to appliances.

POLLUTION

An impairment of the quality of the potable water to a degree that does not create a hazard to the public health but that does adversely and unreasonably affect the aesthetic qualities of such potable waters for domestic use.

POTABLE WATER

Water free from impurities present in amounts sufficient to cause disease or harmful physiological effects and conforming in bacteriological and chemical quality to the requirements of the Public Health Service Drinking Water Standards or the regulations of the public health authority having jurisdiction.

PRIMARY AIR

The air introduced into a burner and mixing with the gas before it reaches the port or ports.

PRIVATE

In the classification of plumbing fixtures, "private" applies to fixtures in residences and apartments, and to fixtures in nonpublic toilet rooms of hotels and motels and similar installations in buildings where the plumbing fixtures are intended for utilization by a family or an individual.

PUBLIC OR PUBLIC UTILIZATION

In the classification of plumbing fixtures, "public" applies to fixtures in general toilet rooms of schools, gymnasiums, hotels, airports, bus and railroad stations, public buildings, bars, public comfort stations, office buildings, stadiums, stores, restaurants, and other installations where a number of fixtures are installed so that their utilization is similarly unrestricted.

PUBLIC WATER MAIN

A water supply pipe for public utilization controlled by public authority.

PURGE

To free a gas conduit of air, gas, or a mixture of gas and air.

Q

QUICK-CLOSING VALVE

A valve or faucet that closes automatically when released manually or that is controlled by a mechanical means for fast-action closing.

QUICK-DISCONNECT DEVICE

A hand-operated device which provides a means for connecting and disconnecting an appliance or an appliance connector to a gas supply and which is equipped with an automatic means to shut off the gas supply when the device is disconnected.

R

READILY ACCESSIBLE

Having direct access without the need of removing any panel, door or similar covering of the item described, and without requiring the use of portable ladders, chairs, etc.

READY ACCESS

That which enables a fixture, appliance or equipment to be directly reached without requiring the removal or movement of any panel, door or similar obstruction and without the use of a portable ladder, step stool or similar device.

REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTER

A backflow prevention device consisting of two independently acting check valves, internally force-loaded to a normally closed position and separated by an intermediate chamber (or zone) in which there is an automatic relief means of venting to atmosphere, internally loaded to a normally open position between two tightly closing shutoff valves and with means for testing for tightness of the checks and opening of relief means.

REGISTERED DESIGN PROFESSIONAL

An architect or engineer registered or licensed to practice professional architecture or engineering as defined by the statutory requirements of the professional registration laws of the state in which the project is to be constructed.

REGULATOR

A device for controlling and maintaining a uniform gas supply pressure, either pounds to inches water column (MP Regulator) or inches to inches water column (appliance regulator).

REGULATOR, MP, 2 PSI (13.8 kPa).

A medium pressure regulator which reduces the 2 psi (13.8 kPa) consumers' gas piping pressure to the appliance regulator or to the appliance utilization pressure.

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