Dufort Testing Service Limited

Hydrostatic testing using the patented Dufort Test Plug on: weld neck, socket weld and slip on flanges; boiler and exchanger tubes; nozzles; vent, drain and orifice valves; Lokring fittings; welded unions. Also providing isolation for hot work and customized plugs for your special needs. 24 hour emergency service.

Contact Info


192 Tunnel Street
Sarnia,  ON
N7T 2K2
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  • Mailing Address: 192 Tunnel Street,  ON, 
  • Year Established: 1988
  • Key Contact: Fred Dufort
  • NAICS Code: 54138 - Testing laboratories
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