Profile: Topaz Inc. provides maintenance and alteration services for on-stream piping systems. We specialize in hot tapping, line plugging and cold cutting technique. We range from high pressure cross-country pipeline transmission to commercial HVAC systems. We sell piping products, which includes welding & mechanical tapping & plugging fittings, plidco leak repair fittings, full encirclement saddles, expansion joints, polly pigs, gas main bags, pipeline insulators and casing end seals.