Pilot Tube Microtunneling

Pilot Tube Microtunneling

Pilot Tube Microtunneling (PTMT) is a trenchless method to install new service lines and gravity flow sewer tunnels with pinpoint accuracy.  This method requires a multi-step sequence of accurately installing a pilot tube, followed by upsizing stages to the final product pipe diameter.

Step One:

Step Two:

Step Three:

Specifications

Case Studies

GBM Case Study – Pilot Tube Microtunneling

The City of Novi, MI sought bids for an emergency repair of a 365-ft. section of sanitary sewer adjacent to a car dealership, at the intersection of Grand River and Meadowbrook Avenues.

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Tunneling