Glossary of Water and Wastewater Terms

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5 random terms from our glossary

microscreen

A device with a fabric straining medium with openings usually between 20 and 60 microns. The fabric is wrapped around the outside of a rotating drum. Wastewater enters the open end of the drum and flows out through the rotating screen cloth. At the highest point of the drum, the collected solids are backwashed by high-pressure water jets into a trough located within the drum.

parachute

A device for hydraulically cleaning sewer lines. Resembling an airport windsock and constructed of canvas-type material, the parachute increases the velocity of a flow at its outlet to wash debris ahead of it. Also called a kite.

sewer jack

A device placed in manholes that supports a yoke or pulley that keeps wires or cables from rubbing against the inlet or outlet of a sewer.

explosimeter

An instrument used to detect explosive atmospheres. When the lower explosive limit (LEL) of an atmosphere is exceeded, an alarm signal on the instrument is activated. Also called a combustible gas detector.

tramp oil

Oil that comes to the surface of a tank due to natural flotation. Also called free oil.