Pipe Lining River Oaks. A River Oaks homeowner contacted us regarding a question about pipe lining. The homeowner wondered if pipe lining would decrease the rate of flow since you’re technically minimizing the inside diameter of the pipe. Perma-Liner has shown, through 3rd party testing, that pipe lining with the Perma-Lateral system actuallyincreases flow and minimizes friction with their jointless, seamless liner material. If you live in River Oaks or the greater Houston area, please contact us to set up a live pipe lining demonstration so you can see for yourself!