Aftermarket Plumbing Services

Serving Maryland, D.C., Northern Virginia, Delaware, & West Virginia

At STH, we understand that maintaining the performance and reliability of your plumbing systems is just as important as choosing the right equipment to begin with. That’s why our Aftermarket Plumbing team is here to provide comprehensive service, repair, and replacement support for critical systems—long after the initial installation.

Protect Your Systems. Prevent Downtime. Extend Equipment Life.

Product

Products

Explore our line card to see the industry-leading manufacturers we represent.

STH Flipbook Online

STH Flipbook Online

Browse our interactive product flipbook for a detailed look at the wide range of equipment and systems we service, from pumps to controls and beyond.

Our Services Include

Sump and Sewage Systems
Sump & Sewage Systems
  • Pump and controller troubleshooting
  • Float and sensor adjustments or replacements
  • Pit pump down analysis
  • Preventative maintenance and system monitoring
Domestic Booster Systems
  • PRV rebuilds and VFD conversions
  • Energy optimization analysis
  • Mechanical seal, motor, and pump repair or replacement
  • Control sequencing and preventative maintenance
  • Temporary pumping capabilities
HVAC Pumps
  • Onsite Pump repairs
  • Pump and motor replacements
  • Seal and bearing replacements
  • Full preventative maintenance programs
Fire Pumps & Controllers
  • NFPA-compliant repairs and troubleshooting
  • Transfer switch diagnostics and ARC flash safety measures
  • Motor repair or replacement
  • Failed system analysis and coupling upgrades
  • Main relief valve repair and water savings analysis
  • Preventative maintenance and monitoring
Water Filtration Systems
  • Point-of-entry and point-of-use systems
  • Cooling tower filtration and Legionella mitigation
  • Water bottle filler servicing
  • Preventative maintenance
Energy & Usage Analysis
  • Pump energy audits across systems
  • Domestic and storm water usage reviews
  • Laser alignment for coupled pumps

Your Partner for Ongoing Support

From emergency response to long-term maintenance planning, STH’s Aftermarket Plumbing team is ready to keep your building’s plumbing systems running efficiently and safely.