Lateral Connections – Worst Contributors of Infiltration and Root Intrusion
ASTM standards acknowledge main liners are not water tight when cut to make a lateral connection with a house service line. Lining the main simply transfers infiltration and root intrusion to the lateral connection when mainline ingress points are eliminated.
Sealing the lateral connection and first joint is now an integral component of systematic mainline rehabilitation programs – typically eliminating 75% – 95% of private source infiltration without lining the entire lateral.
No Digging • No Disruptions • No Homeowner Involvement
So What Is the Best Bang For The Buck?
For sealing annular space Infiltration in newly lined CIPP mainlines, Injection Grouting will provide a great return on investment. Grouting is generally 1/5th of the cost of lateral connection lining, and when you are addressing every lateral on a large scale rehab project this can add up to serious savings. Additionally, lateral liners typically are installed with video evidence as their only post-intstallation “testing method”. Did it work (seal out the infiltration) or did it not? Grouting is performed by first performing an air test to verify that a leak is present (don’t spend money unless there is an issue), then following grouting installation, an air test is performed again to verify that the leaks have been stopped and that the grout will hold a pressure greater than the max head pressure possible based upon the depth of the pipe.
GCU is committed to providing cost effective solutions with OUR tax dollars in mind