Boiler Inspection, Certification & Backflow Testing
Boiler Certification & Backflow Testing Certified Boiler Services Our experienced technicians provide professional boiler inspections, maintenance, repairs, and certification services to help ensure your boiler system operates safely, efficiently, and in compliance with local regulations. Whether you need routine maintenance or certification for a commercial facility, we deliver dependable service you can trust. Backflow Testing & Certification Protect your drinking water with certified backflow prevention testing. We inspect, test, repair, and certify backflow prevention assemblies for residential, commercial, and industrial properties. Our team ensures your system meets all local water authority requirements and provides the necessary documentation upon completion. Our Services Include: Annual Backflow Prevention Testing Backflow Device Repairs & Replacement Backflow Certification Boiler Inspections & Certification Boiler Maintenance & Repairs Commercial & Residential Service Compliance with Local and State Requirements Fast Scheduling & Reliable Service
Standard Backflow Testing (½" Assemblies)
Our standard backflow testing service is designed for residential and small commercial properties with ½-inch backflow prevention assemblies. The service includes a complete performance test, inspection of the device, and submission of the required test results to your local water authority (where applicable).
$160
per certification
Certified backflow performance test
Visual inspection of the assembly
Compliance documentation
Prompt and reliable service
Large Backflow Assembly Testing (1" and Larger)
Larger commercial and industrial backflow prevention assemblies require additional testing and inspection due to their size and complexity. We service 1-inch and larger assemblies to ensure they are operating properly and remain compliant with local regulations.
$180
per certification
Certified testing for larger assemblies
Compliance paperwork
Commercial and industrial service available
Performance verification
Permit to Operate
Many jurisdictions require a Permit to Operate before certain boiler or backflow systems can legally remain in service. We can assist with obtaining the required permit, completing the necessary inspections, and ensuring your equipment meets local compliance requirements.
$335
per certification
Permit application assistance
Required inspection coordination
Compliance documentation
Guidance throughout the approval process
Backflow Certification
Need proof your backflow device has passed inspection? We provide official Backflow Certification documentation for property owners, businesses, HOAs, and municipalities after successful testing.
$160
per certification
Official certification documentation
Compliance records
Documentation accepted by most local water authorities
Schedule Your Service Today
Whether you need annual testing, certification, or assistance with permits, Interlock Plumbing is here to help. Contact us today to schedule your boiler certification or backflow testing appointment.✔ Certified Technicians ✔ Fast Scheduling ✔ Residential & Commercial Service ✔ Honest, Upfront Pricing