Glossary of Plumbing Terms
CIRCUIT VENT A vent that connects to a horizontal drainage branch and vents two traps to a maximum of eight traps or trapped fixtures connected into a battery.
CISTERN A small covered tank for storing water for a home or farm. Generally, this tank stores rainwater to be utilized for purposes other than in the potable water supply, and such tank is placed underground in most cases.
CLEANOUT An access opening in the drainage system utilized for the removal of obstructions. Types of cleanouts include a removable plug or cap, and a removable fixture or trap.
COMBINATION FIXTURE A fixture combining one sink and laundry tray or a two or three compartment sink or laundry tray in one unit.
COMBINATION WASTE & VENT SYSTEM A specifically designed system of waste piping embodying the horizontal wet venting of one or more sinks or floor Drains by means of a common waste and vent pipe adequately sized to provide free movement of air above the flow line of the drain.
COMMON VENT A vent connecting at the junction of two fixture drains or to a fixture branch and serving as a vent for both fixtures.
CONCEALED FOULING SURFACE Any surface of a plumbing fixture which is not readily visible and is not scoured or cleansed with each fixture operation.
CONDUCTOR A pipe inside the building that conveys storm water from the roof to a storm or combined building drain.
CONSTRUCTION DOCUMENTS Written graphic and pictorial documents prepared or assembled for describing the design, location and physical characteristics of the elements of the project necessary for obtaining plan approval in accordance with rule 4101:1-1-06 of the Administrative Code.
CONTAMINATION An impairment of the quality of the potable water that creates an actual hazard to the public health through poisoning or through the spread of disease by sewage, industrial fluids or waste.
CROSS CONNECTION Any physical connection or arrangement between two otherwise separate plumbing systems, one of which contains potable water and the other either water of unknown or questionable safety or steam, gas or chemical, whereby there exists the possibility for flow from one system to the other, with the direction of flow depending on the pressure differential between the two systems (see “Backflow”).