Underground Supply Inc.

Underground Supply, Inc.

Underground Supply, Inc.
  • Manufacturer of Precast Concrete Products
  • Distributor of Water, Sewer, and Drainage Piping and Accessories

Based in Whately, Massachusetts, Underground Supply Inc. is your leading Western Massachusetts source for precast concrete septic tanks, septic accessories, piping and contractor supplies.

Our goal is and will always be to provide our customers with the highest quality concrete title 5 compliant products and accessories with friendly knowledgeable service.

Come by and visit our yard at

82 State Road Whately, MA 01093.

Or call (413) 397 3412

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About Us

Underground Supply has been family owned and operated since 1991. Serving Western Massachusetts and surrounding areas with quality precast concrete septic tanks, distribution boxes, and related construction products.

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Where Are We?

Conveniently located next to Rt. 91, we are easily accessible from all directions. We are just North of Tom's Hot Dogs & Orchard Trailers.

Professional Affiliations

We are proud to be members of two of the most recognized and accredited precast associations.

Founded in 1965, NPCA connects leaders in the manufactured concrete industry through educational, leadership and networking opportunities.

NEPCA is a non-profit association representing manufacturers of precast concrete products and companies that provide equipment, supplies, and services to the industry. Founded in 1998, NEPCA has continued to grow in membership over the past ten years and continues to serve Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island and Vermont.

Job Site Safety

Delivering 1500 gallon septic tanks in one piece provides added safety on the job site, eliminating in-the-hole seam alignment. Preassembly of tanks allows testing tank integrity at our shop without disturbing the seam for delivery.