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Laterals

Lateral liners, like mainline CIPP, can be used with hydrophilic materials to prevent ground water from infiltrating into the lateral pipe.   Lateral CIPP also requires the same quality installation and a trained inspector to observe, verify, inspect, document and test the installation of a lateral rehabilitation liner.

CIPP

CIPP Lateral Lining

Cured-in-Place Pipe (CIPP) lateral lining is a technology that rehabilitates existing lateral pipes while minimizing disruption to yards, sidewalks and driveways.  CIPP lateral lining is appropriate when the host pipe has experienced cracks, fractures or holes but has generally maintained its original shape.

How it works:

  • A tube is manufactured to the required length and diameter, typically 2” – 8” (50 – 200 mm)
  • The tube is vacuum impregnated with resin, passed through a calibration roller, then inserted (pulled-in or inverted) into the existing pipe
  • The tube is installed into the lateral from the house or cleanout, or from the mainline sewer, then pressurized against the host pipe.
  • Using ambient temperature, steam, hot water, hot air or light, the tube is then cured in place
  • The finished CIPP can provide a structural replacement and prevent infiltration and roots
  • A renewed lateral pipe using CIPP technology has a minimum life expectancy of 50 years or more

Lateral and Main/Lateral Connection Lining

Repair by lining a portion of the lateral pipe or the entire lateral pipe and also lining the main/lateral connection

Main/Lateral Connection Sealing

Repair by sealing the main/lateral connection by use of hydrophilic gasket or paste materials.

Cleanout Installation

Trenchless cleanouts are an alternative to digging, shoring, and using trench boxes for installing a lateral cleanout. Cleanouts typically can be installed in two hours with a small footprint and restoration is performed in the same day.

The method consists of locating a lateral pipe and utilizing a vacuum excavator to make a 20-inch hole exposing the lateral pipe. A tapping saddle and riser pipe are remotely attached using a water activated adhesive as the saddle is inserted into the bore-hole and snapped onto the lateral pipe. A leakage test is typically performed before the lateral pipe is cored to complete the installation.

Pipe Bursting

Pipe Bursting

The replacement of a section or an entire lateral pipe by pipe bursting. Several of the technologies provide either pipeline rehabilitation or a watertight seal solution. Some technologies provide solutions to both. Owners must determine their expectations for a rehabilitation project in order to select the best, most applicable products and technologies. For example, if the goals of the project are to reduce infiltration entering the sewer system, then the technologies that provide a long-term watertight seal should be selected. If the goals are to renew the pipe structurally to as good as, or better than, original condition, then the technologies with proven and accepted design and service life concepts should be selected. The goal may be to eliminate both infiltration and rehabilitate the pipe to original standards. Many lateral rehabilitation technologies provide structural replacement or leakage control for the design and service life as determined by the manufacturer of the product and the expectations of the owner.   Field tests should be required by the owner to confirm specified technology performance. 

Sliplining

(See Sliplining under Mainline Sliplining)

Folded Thermoplastic Pipe

(See Mainline Folded Thermoplastic Pipe)

HDPE

(See Mainline HDPE)

PVC

(See Mainline PVC)

Equipment & Materials 

(See under Mainline )

Lateral Injection Grouting

Repair by sealing the main/lateral connection and the entire lateral pipe or a portion of the lateral pipe by chemical grout injection It has been determined, through a number of studies, that laterals and main to lateral connections can contribute as much as 50% of the infiltration in a collection system.
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