Conduit at downstream end of a combined sewer that carries sewage to a treatment plant.

A device permanently installed in the line of an effluent flow to remove free phase oil from water. Floating oil is typically separated from the water by means of a series of baffles.

Device for separating grease and oil from drainage system. See grease trap.

A device designed and installed so as to separate and retain deleterious, hazardous, or undesirable matter from normal wastes and permit normal sewage or liquid wastes to discharge into the drainage system by gravity.

Separating and trapping device for grease and oil, which exists in a plumbing drainage system.