Trenchless Technology Center
Louisiana Tech University

Water Environment Research Foundation

Rehabilitation of defective sewer laterals restores impaired structural integrity and reduced hydraulic capacity of these pipes, as well as improves the leak-tightness of pipes and connections and hence eliminates or minimizes groundwater infiltration into the sewer system and/or exfiltration of wastewater into the surrounding soil. Rehabilitation also prevents root intrusion through defects into the pipes, which is a serious problem for many agencies.

Sewer laterals can be repaired or replaced either over their entire length or only in selected parts.

A number of trenchless rehabilitation methods have been developed for the purpose of lateral repair—the principal methods in use today being cured-in-place (CIP) relining products, replacement by pipe bursting, chemical grouting, and flood grouting. Robotic repairs are a relatively new method, whereas mechanical repair sleeves for sectional repair of laterals are less frequently used.

The lateral rehabilitation methods shown below are included in our database. Click on the link to see details.
CIP Relining
  CIP, Standard Liners
  CIP, Remotely Inverted Standard Liners
  CIP, T-Liners
  CIP, Short T-Liners
  CIP, Top Hats
Pipe Bursting
  Static Pull
  Pneumatic Bursting
Lateral Chemical Grouting
  Grouting, Mainline Packers
  Grouting, Push Type Packers
Flood Grouting
Robotic Repairs
  Robotic, Pressure Applications
  Robotic, Non-Pressure Applications
Mechanical Repair Sleeves
Grouting, Push Type Packers

Grouting of lateral pipes is carried out using special push type packers that are inserted through cleanouts and moved along the lateral while performing test-and-seal procedure in 3 ft or 5 ft increments. The grouting can be performed along entire lateral or any selected length of lateral pipe

CompanyLogiball Inc.
Product/System NameFlexible Push-Type Packer
Product Material
Product CureAmbient
Lateral, Pipe TypeAny
Lateral Dia, Min4 in.
Lateral Dia, Max8 in.
Lateral Dia, TransitionYes
Repair in Lateral, Max100 ft
Mainline Dia, Min-
Mainline Dia, Max-
Repair in Mainline0
Bends in Lateral, 90sTwo 45 deg
Offset of Joints, Max1 in.
Lateral Protruding, Max-
Active Leaks (Heavy)Yes
Lateral CleaningYes (rrots, mineral buildup)
Cleanout (1 or more)Yes
Pit(s) ExcavationNo
Entering Private PropertyDepends
Lateral PluggingNo
Mainline PluggingNo
Structural RepairNo
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