STH Inc.

An Ovation Holdings Inc. Company

Trusted Pump Solutions for Commercial, Municipal, Industrial, and Fire Protection Systems

STH, Inc. (formerly Shafer, Troxell & Howe, Inc.) is a leading provider of engineered pumping systems, products, and services for commercial, municipal, industrial, fire protection, and plumbing markets. Based in Frederick, Maryland, STH combines decades of industry experience with technical expertise to help customers design, specify, install, and maintain critical water and fluid-handling systems.

Founded as a manufacturer’s representative in 1932 and incorporated as STH, Inc. in 1973, the company has evolved into a trusted partner for pre-engineered and packaged fire pumps, water booster systems, sump and sewage systems, controllers, VFDs, rainwater harvesting, and related equipment. STH focuses on system application analysis, reliable product selection, and responsive field service to ensure mission-critical infrastructure operates efficiently and reliably.

STH serves markets across Maryland, Washington, D.C., Northern Virginia, Delaware, and West Virginia, offering preventative maintenance programs, startup services, engineering support, and comprehensive pump solutions tailored to project needs. With factory-certified technicians and a commitment to minimizing downtime, STH helps clients avoid costly failures and extend the life of their systems.