Project and article
Charlestown trenchless sewer lining
We renewed a 4-inch lateral that transitioned to a 6-inch main beneath a finished Charlestown basement. We recorded it with our camera, jetted it and installed one continuous cured-in-place pipe (CIPP) liner from inside the home.

Repeated backups pointed us to a cracked hub beneath a finished basement.
Repeated backups pointed to deterioration in this home's sewer, with scale and cracking at the hub where its smaller lateral met the larger main.
Excavating the full run under finished space was a last resort, so we planned interior access for our camera, cleaning tools and inversion equipment.
Our camera recording sized one liner for the 4-inch to 6-inch transition.
We used high-definition camera work to map defects along this home's lateral and confirm the 4-inch to 6-inch transition beneath the finished basement.
The recording showed heavy scale, cracking at the hub and infiltration. We used measurements from that footage to size a single continuous CIPP liner intended to bridge the transition.
We jetted and descaled this sewer before any resin work.
Our technicians performed thorough hydro jetting and descaling to remove corrosion and buildup before resin work.
Cleaning cleared the obstructions so we could inspect, measure and line the full run from interior access at a basement tie-in.
Our photographs show the lining equipment set up at the basement floor opening.
We inverted the liner from the basement and cured it in place.
We inverted a resin-saturated liner from the basement access and cured it to form a continuous pipe wall across the size change and the joints along the run.
We completed the installation indoors through the planned access opening instead of excavating along the full sewer path under finished space.
We brush-coated the small branches instead of lining them.
We applied epoxy brush coating to small branches where their condition and diameter suited that approach after cleaning and drying.
We renewed the transition while limiting excavation under finished space.
Our repair renewed the 4-inch to 6-inch transition while limiting excavation along the home's sewer route beneath finished space. We addressed the smaller branches with a different application method instead of forcing one solution across the whole system.
If your sewer changes size beneath a finished floor, we can record it with our camera and measure whether one continuous liner can bridge the transition.
Filed under
- Boston Pipelining Company Charlestown
- Boston trenchless contractors
- Boston trenchless pipelining
- Charlestown basement sewer repair
- Charlestown cast iron pipe lining
- Charlestown CIPP lining
- Charlestown drain repair
- Charlestown sewer inspection
- Charlestown sewer lining
- Charlestown trenchless sewer repair
- Charlestown underground pipe repair
- commercial trenchless repair Boston
- cured in place pipe Charlestown
- epoxy brush coating Charlestown
- hydro jetting Charlestown
- no dig sewer repair Charlestown
- residential trenchless repair Charlestown
- trenchless pipe replacement Charlestown
- trenchless sewer rehabilitation Charlestown
- UV cured pipe lining Charlestown
