You rely on plumbing systems that perform without interruption. With MacDonald-Miller, you get expert commercial plumbing services tailored to your building’s needs, from routine maintenance and system upgrades to urgent repairs. Our union-certified technicians bring deep experience and the latest technology to keep your systems running smoothly and your building fully operational.
Plumbing

Commercial Plumbing Services
Services
Preventive Maintenance
Preventive Maintenance Programs
Drain Cleaning Maintenance
High-Pressure Hydro-Jetting
Pump Maintenance
Sewer/Storm Pump Lift Station Maintenance
Water Heater Preventive Maintenance
Service & Repairs
24/7 Emergency Service
Plumbing Leak Repair & Pipe Replacement
Domestic Water & Underground Sewer Repairs
Sewer/Storm Pump Lift Station Repair
Commercial Water Heater/Boiler Repair & Installation
Pump Repair & Replacement
Plumbing Fixture Repair & Replacement
Inspection & Specialty Services
Camera Inspection & Underground Pipe Locating/Tracing
Backflow Testing
Diagnostics for Low Water Pressure & Temperature Issues
Pipe Freezing on Live Plumbing Systems
Medical Piping & Equipment Repair
Natural Gas Troubleshooting
Ready to Start? Get in Touch.
Send us a message
Required Fields *
Explore Plumbing Projects
Government & Education
- Design-Assist
- QA/QC
- Engineering
- Detailing
- BIM
- Construction
- Fabrication
- HVAC
- Controls
- TAB
- Plumbing
- Commissioning
- + Show More
- – Show Less
Grant County Sheriff’s Complex
Ephrata, WA
Commercial & Mixed-Use
- Award Winning
- Engineering
- Detailing
- Construction
- Fabrication
- HVAC
- Controls
- TAB
- Plumbing
- + Show More
- – Show Less
TikTok USDS Bellevue
Bellevue, WA
Government & Education
- Energy Efficiency
- Construction
- Fabrication
- HVAC
- Plumbing
- Safety
- + Show More
- – Show Less
University of Idaho
Moscow, ID
Commercial & Mixed-Use
- Building Management System
- Engineering
- Detailing
- Construction
- Fabrication
- HVAC
- Controls
- Electrical
- Plumbing
- Safety
- + Show More
- – Show Less
Rainier Square
Seattle, WA
Commercial & Mixed-Use
- Design-Build
- Mass Timber
- Rainwater Harvesting
- LEED
- Sustainability
- Award Winning
- Construction
- HVAC
- Controls
- Plumbing
- + Show More
- – Show Less
CornerStone
Seattle, WA
Healthcare
- Medical Gas
- Construction
- Fabrication
- HVAC
- Plumbing
- Safety
- + Show More
- – Show Less
Saint Anthony’s Acute Care Expansion
Gig Harbor, WA
Commercial & Mixed-Use
- Historic Building
- Award Winning
- Engineering
- Detailing
- BIM
- Construction
- Tenant Improvement
- Controls
- TAB
- Plumbing
- Special Project
- + Show More
- – Show Less
Big Fish Games
Seattle, WA
Commercial & Mixed-Use
- Design-Assist
- BIM
- Construction
- Fabrication
- HVAC
- Controls
- TAB
- Plumbing
- Safety
- + Show More
- – Show Less
Snoqualmie Casino Expansion
Snoqualmie, WA
Healthcare
- Design-Assist
- BIM
- Fabrication
- HVAC
- Plumbing
- + Show More
- – Show Less
Providence Swedish North Tower
Seattle, WA
Commercial & Mixed-Use
- Central Plant
- Sustainability
- Construction
- Fabrication
- HVAC
- Controls
- TAB
- Plumbing
- Safety
- + Show More
- – Show Less
Seattle Convention Center Summit Building
Seattle, WA
Life Science & Biotech
- Design-Build
- Award Winning
- Engineering
- Detailing
- Construction
- Tenant Improvement
- HVAC
- Plumbing
- Chiller
- Boiler
- Safety
- + Show More
- – Show Less
Umoja Biopharma Headquarters
Seattle, WA
Healthcare
- Medical Gas
- Value Engineering
- Design-Assist
- BIM
- HVAC
- Electrical
- Plumbing
- + Show More
- – Show Less
Seattle Children’s Hospital Building Care
Seattle, WA











