Perma-Liner Point Repair
Liner is a non-disruptive
method for repairing localized structural problems in an otherwise
sound pipe. Using a resin impregnated felt/fiberglass reinforcement
with PU/PVC inner coating, this point repair method rehabilitates
damaged pipe with diameters from 150-1200 mm and up to 9 metres in
length without digging.
The result is a structurally sound,
long-lasting and economical alternative to other rehabilitation
solutions. Point repairs are generally completed in a few hours
without disrupting the flow in the line. Access is gained through
the closest manhole where the impregnated liner "tube" is moved
into place under constant visual monitoring by an experienced,
trained, professional crew. When in place, the point repair is
pressed tightly against the inside walls of the host pipe and then
cured in place.
Point repairs are most effective in
sewers with structural defects due to localized settling, excess
loading conditions, an offset joint, corrosion or poor initial
construction. While point repairs may stop infiltration if the pipe
is already leaking at the location of the repair, it must be
understood that they cannot solve infiltration problems throughout
the sewer. Groundwater will simply find another location to enter
the pipe. The only way to eliminate infiltration is to seal every
joint in each mainline section.
