Full-service.
Start to finish.
From water well development and pump rebuilds to electrical work, field diagnostics, and long-term maintenance contracts — GPC handles it all in-house.
Water Well Development & Redevelopment
From restoring aging infrastructure to developing new water sources, GPC handles the full range of water well work — for municipalities, water districts, and private operators across California.
- Well redevelopment and rehabilitation
- Well videography and downhole inspection
- Specific capacity and step drawdown testing
- Aquifer pump testing and analysis
- Well destruction and abandonment
- Casing installation and grouting
Submersible & Vertical Motor Repair
Our shop technicians service, rebuild, and test all makes and models of submersible and lineshaft motors — keeping your pumping system running at peak efficiency.
- Submersible motor teardown and inspection
- Winding repair and replacement
- Bearing replacement and shaft straightening
- Insulation resistance and load testing
- Vertical hollow shaft motor service
- Motor reinstallation and startup
- Emergency motor replacement and sourcing
Complete Pump Rebuild & Balancing
Our in-house shop handles complete pump rebuilds from teardown to reassembly. Precision balancing and machining capabilities ensure every pump leaves our shop performing to spec.
- Full pump teardown, inspection, and rebuild
- Impeller precision balancing
- Bowl and column assembly service
- Wear ring and diffuser replacement
- Shaft straightening and replacement
- Pump performance testing
- New pump supply and installation
Motor Controls & Electrical Systems
GPC’s licensed electricians handle motor control systems, panel work, and electrical infrastructure for pump stations and water facilities — from troubleshooting to full installation.
- Variable frequency drive (VFD) installation and service
- Motor control center (MCC) work
- Pump station electrical panel installation
- SCADA and telemetry system support
- Power quality and load analysis
- Electrical troubleshooting and diagnostics
- Code-compliant wiring and conduit work
On-Site Diagnostics & Field Repairs
When something goes wrong in the field, GPC’s service rig fleet is ready to respond. Our field crews handle pump pulls, on-site repairs, and performance testing directly at your well or pump station.
- Emergency pump pull and reset
- Field pump performance and efficiency testing
- Surge block and air development
- Downhole video inspection
- On-site mechanical repairs
- Pump and motor set and plumb
- Valve, column, and discharge head service
Planned Maintenance & Service Contracts
GPC holds 65+ annual maintenance and service contracts with water utilities and municipalities across California. Planned maintenance keeps your system running — and prevents the emergencies that don’t.
- Scheduled pump and motor inspections
- Annual performance testing and reporting
- Predictive maintenance planning
- Lubrication, alignment, and bearing service
- Priority response for contract clients
- Multi-site contract management
- Compliance documentation and reporting
Ready to talk about your project?
Contact a GPC specialist today. We’ll assess your needs and give you a clear, honest quote — no runaround.