a sewer connection to a manhole made by a vertical pipe tapped horizontal at, or near, the bottom of the manhole. Sometimes referred to as a drop manhole.
a special form of union having a lip or seat that prevents the gasket from being squeezed into the pipe so as to obstruct the flow.
a pipe size or tube size pipe fitting made from any of a number of commercial grades of copper by pouring the molten metal into a mold. Compare with wrought copper fittings which are formed by pressure from tubing.
a surface and texture generally smooth which does not offer suitability to absorption.
petroleum; any of several volatile, flammable, liquid hydrocarbon mixtures obtained by distilling certain carbonaceous materials. Used chiefly as solvents and dilutents and as raw materials for conversion to gasoline.
bacteria having the quality of living in or on another organism for existence or support without making a useful or adequate return.
a grayish-white, usually hard and brittle, polyvalent metallic element that resembles iron, but is not magnetic. It increases the strength, harness and soundness of steel.