Glossary of Water and Wastewater Terms

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5 random terms from our glossary

Elbow

A pipe fitting that connects two pipes at an angle. The angle is usually 90 degrees unless another angle is stated. Also called an ell.

Rotameter (ROTE-uh-ME-ter)

A device used to measure the flow rate of gases and liquids. The gas or liquid being measured flows vertically up a tapered, calibrated tube. Inside the tube is a small ball or bullet-shaped float (it may rotate) that rises or falls depending on the flow rate. The flow rate may be read on a scale behind or on the tube by looking at the middle of the ball or at the widest part or top of the float.

Anaerobic Selector (AN-air-O-bick)

Anaerobic refers to the practical absence of dissolved and chemically bound oxygen. Selector refers to a reactor or basin and environmental conditions (food, lack of DO) intended to favor the growth of certain organisms over others. Also see SELECTOR.

Two-Way Cleanout

An opening in pipes or sewers designed for rodding or working a snake into the pipe in either direction. Two-way cleanouts are most often found in building lateral pipes at or near a property line.

Rod, Sewer

A light metal rod, three to five feet long, with a coupling at each end. Rods are joined and pushed into a sewer to dislodge obstructions.