the neutralization or removal of conditions injurious to health. (e.g.sanitary engineering; purification of water supply; disposal of sewage; etc.)

1. a type of water seal trap in which the outlet leg is increased in diameter to contain a sufficient volume of liquid to prevent a siphoning action which would break the seal. 2. a trap designed to prevent the emptying of a sanitary trap because of difference of pressure. 

an “exploded”, or open drawing, of the component of an assembly shown separately in their relative positions.

1. the conduit of an appliance which supplies gas to the individual burners. 2. a fitting or pipe with many outlets or connections relatively close together. 

a conically shaped graduated vessel used to measure approximately the volume of settleable solids in various liquids of sewage origin

a nearly silver-white hard, malleable, ductile, metallic element capable of a high polish and resistant to corrosion. Used chiefly in alloys and as a catalyst. Nickel increases both the strength and toughness of steel.

1. a cement usually made of whiting and boiled linseed oil beaten, or kneaded, to the consistency of dough and used in fastening glass in sashes and stopping crevices in woodwork. 2. a mixture of red and white lead and boiled linseed oil used as a lute in pipe fitting. 

1. ring shaped. 2. In plumbing, the annular space is the ring shaped open space between the inside wall of the hub and the outside wall of the spigot on a fitting to be caulked. 

a manhole at the joining point of two or more sewers.