25 Hale True Road Rd Sandown, NH 03873
Phone: 603-670-5729
Email: John@nhexcavation.com


"John did what he said he would do in a timely fashion, very good price for the work. He was very good to come back, explained what he was doing, would make changes as needed, just very thorough in the work."

riserTank Extension Installation

Risers or Tank Extensions create easy, direct access, to your septic tank or pump chamber. Tank extensions are necessary for tanks under a driveway or parking lot.  Once an extension is installed, regular maintenance and pumping will not disrupt your lawn due to digging to locate the tank. The riser will sit at ground level and blend with the current landscape or grade level.


  • Tank extension installation
  • Sewer riser and cap installation