Performed trenchless sewer line repair by inserting a 6" cured-in-place pipe (CIPP) liner through the existing outside 6" cast iron cleanout. Relined approximately 25 linear feet of cracked sewer lateral up to the city main connection. Utilized an epoxy resin saturated liner tube pulled through with a calibration hose. Inflated the liner against the host pipe with compressed air, curing the epoxy to create a new seamless pipe within a pipe. Grouted the liner at both ends for a watertight seal. Conducted post-installation video inspection to verify integrity.