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.
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.
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.