downtown alexandria
STH is a market leader in and around the Washington, DC metro area, including Alexandria, Virginia. We are proud to provide service in the sale and maintenance of domestic water boosters, fire and water pumps, sump & sewage systems and related controls. We also provide pre-engineered wastewater and rainwater harvesting systems which service both the municipal and commercial markets. If you are in need of water pumps, sewage systems, or other related controls or systems, contact us today!