a hydrate sodium borate. Used as a flux, cleansing agent, preservative, fire retardant and water softener. Advertisements
a spirit level usually with an alcohol filled levelling tube.
that part of the trap in which the direction of flow is changed from upward to downward.
a biological sewage treatment process in which a mixture of sewage and activated sludge is agitated and aerated. The activated sludge is subsequently separated from the treated sewage (mixed liquor) by sedimentation, and wasted or returned to the process as needed. The treated sewage overflows the weir of the settling tank in which the separation […]
a pipe usually five to ten percent thinner than full weight pipe.
a tough, reddish brown, metallic chemical element that resists rust, and is easily shaped into thin sheets or fine wire. Used extensively in piping systems. Also used in alloys such as brass and bronze.
an alloy, essentially of copper, with a base metal of zinc. Often other metals are added to make the alloy stronger, harder, or to improve machinability. Other elements added for a specific purpose are lead, nickel, tin, aluminum and manganese.