Rainbow Mechanical Services Ltd. has been servicing the industry since 1973, serving all of Southern Ontario from London to Ottawa. We have at present over 30 service vehicles on the road. Diversity combined with first class workmanship and "Customer First" attitude, remain the backbone of Rainbow Mechanical's reputation.

Rainbow Mechanical takes pride in the technical depth and experience to service all Hydronic Heating, Chilled Water, Plumbing and HVAC Systems. Our dedication and commitment for excellent customer service has kept our customers loyal and satisfied, we take pride in the business relationships we have established.

46+  Year Experience
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We specialize in the complete installation of heating and air conditioning systems; hydronic water heating; radiant heating systems; pressurized fresh air systems; CO detection systems; and chimney liner installations. 

Plumbing Plumbing

We provide a full range of residential and commercial plumbing services:  water, storm, and sanitary drainage; plumbing fixtures, water pumps for single-unit dwellings; and complete plumbing service for high-rise construction.

Preventative Maintenance Preventative Maintenance

Our preventative maintenance program keeps mechanical systems at peak performance, while preventing potential breakdowns and operational issues. For emergency situations, our 24/7 service allows for quick response times.

Backflow Prevention Backflow Prevention

Our certified installers and master plumbers provide complete installation of backflow prevention systems. For added service maintenance we offer annual testing, calibration and tagging of backflow prevention systems. 

Water Treatment Water Treatment

We specialize in the installation of closed-loop water treatment equipment, as well as potable water filtration. We also provide water treatment programs and water quality analysis, along with testing results and documented reports.


Pioneering the Mechanical Industry since 1973.

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