Trenchless sewer repair: which fix? #shorts
A leaking joint, a wet crack, a dry crack and a long damaged run each take a different trenchless sewer repair. The full explainer is on our channel.
Application Overview
This Short is the opening of the full explainer. The long video adds the joint-seal and sleeve ratings, the repair-length formula and the point-repair or reline decision.
English transcript
From the subtitle track delivered with the video. Refer to the video and product documentation for technical details.
Trenchless sewer repair can fix a leak from inside, with no trench. But only if the fix matches the defect. First question: which way is the water moving? If the water table sits above the pipe, groundwater pushes in through the gap. That's infiltration. If the sewer runs full, sewage pushes out into the soil. That's exfiltration. It's hydrostatics: pressure equals density, times g, times head. Ten metres of water make about one bar. Three metres of groundwater press about zero point three bar. Water that gets in drags sand along, and leaves voids under the road. So read the camera survey, and match the fix to the defect. Leaking joint: an internal joint seal. Crack under running water: a mechanical sleeve. Dry crack: a sectional patch. Damage all along the run: that's a job for full-length lining. The full explainer, with repair sizing, is on our channel.
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