Throughout the year, we maintain and inspect sewer lines and manholes to Throughout the year, we maintain and inspect sewer lines and manholes to
identify and repair defects before problems occur. Cary annually budgets identify and repair defects before problems occur. Cary annually budgets
funds to renew aging sections of this critical infrastructure to reduce the funds to renew aging sections of this critical infrastructure to reduce the
risk of disruptive and costly emergency repairs. This work extends the risk of disruptive and costly emergency repairs. This work extends the
service life of these assets by at least 50 years. service life of these assets by at least 50 years.
The flexible liner is installed in
sections from one manhole to the
next manhole. Air or water pressure
is used to push and inflate the liner
inside the pipe and expand it for a
secure and tight fit. The liner contains
a special resin that hardens when hot
water or steam is applied to start the
curing process.
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Once the curing process is
complete, the liner becomes
a "pipe-within-a-pipe" that
is seamless from manhole
to manhole and is corrosion
resistant. Any connections to the
repaired sewer pipe are restored
and the pipe is placed back in
service within the same day.
The most common
method of sewer
rehabilitation
involves installing
a cured-in-place
liner into an
existing sewer pipe.
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