Patent ID: 7517409

Claim:
A system for applying barrier coatings to interior walls of piping systems in buildings, where the piping systems have a plurality of branches off of main pipes, comprising: a building piping system having pipes with piping sections having a plurality of elbow bends and t-branches; a compressed air generator for generating pressurized air up to approximately 200 psi into one end of the building piping system, for drying pipe interior walls of the building piping system; a regulator for selectively adjusting air capacities of the pressurized air from the compressed air generator in a range between unregulated air and regulated air of approximately 200 psi into the piping system, the regulator being operable to select any continuous air capacity between the ranges of unregulated air and approximately 200 psi of regulated air; an abrasive agent mixture in combination with the continuous selected air capacity, for cleaning all of the dried interior walls of the pipes in the building piping system in a single pass run, without using liquids and chemical agents; a liquid coating source in combination with the continuous selected air capacity, for applying a liquid barrier coating to all of the cleaned walls of the pipes in the building piping system in another single pass run; and a collector for generating a vacuum up to approximately 1100 CFM, in a second end of the building piping system, wherein the compressed air generator and the vacuum generator are operating simultaneously with each other while the abrasive agent mixture is cleaning all of the interior walls of all of the pipes in the building piping system in the single pass run, and without having to section off the piping sections in the piping system, followed by the compressed air generator and the vacuum generator are operating simultaneously with each other while the liquid barrier coating is applied to all of the cleaned interior walls of all of the pipes in the building piping system in the another single pass run, and without having to section off the piping sections in the piping system.