STI Precast

A New England mainstay, STI Precast (Formerly Sani-Tank) has been serving our clients’ precast concrete needs for more than 60 years.

What We Do

Septic Tanks and Leaching Basins

The most durable precast septic products

Catch Basins

Sizes to Fit any Need

Sewer and Drain Manholes

Precast concrete from STI will last under the toughest conditions

About STI Precast

STI Precast was initially established as Sani-Tank, Inc. and in 2019 we changed name to reflect our evolution as a comprehensive concrete specialist in both standard and customized precast products.

 We service contractors, developers, municipalities & homeowners all over New England building partnerships with engineers, designers, and contractors.

For more information on fulfilling your precast needs,
please contact us at:

STI Precast
60 Lanides Lane
Leominster, MA 01453

Only the Best



Decades in experience serving New England’s precast concrete needs


The Newest Technology

Dedicated to using the highest quality proven products


Expert Installation

Making sure your project goes right

No Project Too Big Or Too Small

We expertly install the following products:


  • Septic Tanks H-10 & H-20
  • Dry Wells (Pits)
  • Tank Extensions & Well Tiles
  • Well Covers
  • Sewer Manholes
  • Drain Manholes
  • Retaining Walls
  • Flower Pots

Contact Us

60 Lanides Lane, Leominster, MA


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