Commercial Backflow Testing & Certification in Windsor, ON
Qualified backflow preventer testing for commercial properties in Windsor. City of Windsor Utilities Corporation (ENWIN) compliance under City of Windsor By-law 165-2004 (Cross-Connection Control).
Backflow Compliance in Windsor
Windsor’s automotive manufacturing sector, including Stellantis assembly plant operations, cross-border industrial activity with Detroit, and Windsor Regional Hospital create high demand for RPZ assemblies and rigorous annual backflow testing. ENWIN Utilities enforces Windsor’s dedicated Cross-Connection Control By-law 165-2004, with focus on industrial accounts along the EC Row Expressway corridor and the hospital campus on Ouellette Avenue.
Governing Authority
- Water Authority
- City of Windsor Utilities Corporation (ENWIN)
- Bylaw
City of Windsor By-law 165-2004 (Cross-Connection Control)- Official Source
- citywindsor.ca
- Testing Frequency
- Annual
City of Windsor By-law 165-2004 (Cross-Connection Control) — citywindsor.ca
Read the full Ontario backflow regulation overview →
Properties We Test in Windsor
Bates Plumbing tests all commercial, industrial, and institutional property types across Windsor. The following sectors account for the majority of RPZ and DCVA testing activity in the city:
- Automotive manufacturing and supply (Stellantis, Tier-1 suppliers) — Highest-hazard RPZ assemblies on process water, coolant connections, and chemical treatment systems. Automotive assembly facilities are among the most complex backflow compliance accounts in any Ontario municipality, with multiple assemblies across production areas.
- Windsor Regional Hospital (both campuses) — Severe-hazard RPZ assemblies on medical, sterile processing, dialysis, and laboratory water connections at the Ouellette Campus and Metropolitan Campus. Each campus requires independent annual test records submitted to ENWIN.
- Windsor Casino and associated hospitality — RPZ assemblies on food service connections, large commercial kitchen operations, and beverage systems within a high-volume hospitality facility. Food service assemblies at this scale require rigorous annual documentation.
- Restaurants and food service along Ouellette Avenue and the downtown core — RPZ assemblies on commercial kitchen and beverage connections for the dense concentration of food service operators in central Windsor.
- Cross-border industrial operations — Process water connections for facilities serving the Detroit automotive supply chain along the EC Row Expressway industrial corridor. Industrial tenants in this corridor frequently carry multiple RPZ assemblies on high-hazard connections.
What Bates Plumbing Provides
- Field testing of all ASSE-listed backflow prevention assemblies
- Written test report with pass/fail status, test readings, and assembly details
- Direct submission of compliance report to ENWIN Utilities
- Same-day compliance certificate for your records
- Failure report with repair options and timeline recommendations if assembly does not pass
- Annual reminders for properties on our service roster
Frequently Asked Questions — Windsor
Do automotive manufacturing facilities in Windsor require RPZ assemblies?
Yes. Automotive assembly plants are among the highest-hazard industrial properties for cross-connection risk. Process water, coolant systems, and chemical treatment connections require RPZ assemblies due to the severe contamination potential they present to the municipal water supply. ENWIN enforces annual testing and report submission for all such assemblies under City of Windsor By-law 165-2004. Facilities like the Stellantis assembly plant typically carry multiple assemblies across distinct production and utility connections.
Does Windsor Regional Hospital require annual backflow testing?
Yes. Both the Ouellette Campus and Metropolitan Campus of Windsor Regional Hospital have severe-hazard RPZ assemblies on clinical water systems, sterile processing, dialysis, and laboratory connections. ENWIN requires annual testing and report submission for all such assemblies under By-law 165-2004. A hospital system operating across two separate campuses carries a significant number of discrete assemblies, each requiring its own annual test record and submission.
Request a Quote — Windsor
Response within one business day. Commercial properties only.