Patent ID: 8887660

Claim:
A system for renovating pipes, comprising: a supply of pressurized gas, the gas supply having an outlet for generating positive pressurized gas therefrom up to approximately 1600 CFM (cubic feet per meter); a mixer having a first inlet connected to the outlet of the gas supply, a second inlet for supply of abrasive particles to the mixer for mixing with the gas, and an outlet for the mixture of pressurized gas and abrasive particles; a first hose for selectively connecting the mixer outlet to a first end of a pipe; a vacuum pump for drawing air therethrough up to approximately 1100 CFM (cubic feet per meter); and a second hose having a first end connected to the vacuum pump and a second end for selective connection to a second end of the pipe, whereby the mixture of the positive pressurized gas and abrasive particles is blown into the first end of the pipe while sucked out at the second end of the pipe with the vacuum in order to clean the pipe, wherein the positive pressurized gas supply maintains a positive pressure through the pipe until the pipe is cleaned in a single pass run; and a barrier coating dispensing unit for dispensing a liquid barrier coating into the first end of the pipe by the pressurized gas after the pipe is cleaned, whereby the liquid barrier coating is dispensed into the first end of the pipe and pulled out at the second end of the pipe by the vacuum pump until interior walls of the pipe are coated with the barrier coating, wherein the positive pressurized gas supply maintains a positive pressure through the pipe until the pipe is coated in a single pass run.