PPI (Plastic Pipe Institute)
A division of The Society of the Plastics Industry, Inc.
PRC
PolyesterResin formed by condensation of polybasic and monobasic acids with polyhydric alcohols. Resin Concrete
Precipitation
Process by which water in liquid or solid state (rain, sleet, snow) is discharged out of the atmosphere upon a land or water surface.
Preconditioning Work
That part of a project, usually before renovation work, which includes preparatory cleaning and internal inspection.
Preparatory Cleaning
Internal cleaning of pipelines, particularly sewers, prior to inspection, usually with water jetting and removal of material where appropriate.