STH specializes in the Application, Sale and Service of
Pre-Engineered and Packaged:

• Fire Pumps
• Water Booster Systems
• Sump & Sewage Systems
• On-Site Waste Water Systems
• Rainwater Harvest Systems
• Controllers & VFD's

Serving the Commercial and Municipal markets throughout Maryland, Washington DC, Northern Virginia, Delaware and West Virginia.


We are proud of the manufacturers we represent and pledge to treat our customers with fairness and integrity.

We add value through systems application expertise, providing quality engineered products, and unparalleled field service.


(301) 682-3390
97-C Monocacy Blvd  Frederick, MD  21701
FAX (301) 682-3391
© 2014 STH, Inc.