About the Business
4G Plumbing & Heating, Inc. has operated in Missoula since 1964, when Gordon and Geniece Jensen and Glen and Geneva Petit started the business. It incorporated in 1971 and expanded over time into broader mechanical, excavation and electrical work.
The company handles commercial and industrial plumbing and mechanical projects from planning and budgeting through startup. It works as a prime contractor or subcontractor on competitive-bid, plan-and-specification and design-build projects, while a service department handles residential and commercial plumbing and HVAC calls.
Its staff model is built around licensed trades and advancement. The company reports master plumbers, journeymen, sheet-metal workers and registered apprentices, with some employees moving from shop positions through apprenticeship and into foreman or project-management roles.
4G moved to West Harrier Drive in the Missoula Development Park in 2008. Independent consumer-review volume is limited, but public permit listings attribute recent work to the company at Community Medical Center, University of Montana facilities, banks and commercial remodels around Missoula.
Profile Researched July 2026
Services Offered
Frequently Asked Questions
When was 4G Plumbing & Heating founded?+
4G Plumbing & Heating was founded in Missoula in 1964 by Gordon and Geniece Jensen and Glen and Geneva Petit. The company incorporated in 1971.
Where is 4G Plumbing & Heating located?+
4G Plumbing & Heating is located at 5641 W. Harrier Dr. in the Missoula Development Park. The company moved to that address in 2008.
Does 4G Plumbing & Heating work on commercial projects?+
Yes. 4G provides commercial and industrial mechanical and plumbing work as a prime contractor or subcontractor, including competitive-bid and design-build projects.
Does 4G Plumbing & Heating handle residential service calls?+
Yes. Its service department handles day-to-day residential and commercial calls for plumbing, heating, air conditioning and related system work.
What specialized services does 4G Plumbing & Heating offer?+
Its listed specialties include line freezing, thermal-imaging leak detection, backflow testing and repair, medical gas service, combustion analysis, gas piping and system diagnostics.
Is 4G Plumbing & Heating a union contractor?+
Yes. The company is a signatory contractor with UA Local 459 and is affiliated with SMART Local 103.
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