Park Hill Sewer Replacement. A Park Hill homeowner contacted us regarding his sewer line and the possibility of replacing it. We explained the differences of digging and replacing the sewer vs. pipe relining. Once the Park Hill homeowner realized the costs associated with the restoration of his driveway and landscaping, it was a no brainer to decide on pipe relining. If you live in Park Hill or another Denver neighborhood, please visitwww.perma-liner.com or www.youtube.com/PermaLiner to learn more about the differences of sewer replacement and pipe relining.