The Leaders in Pipe Fusion. The name McElroy is recognized as the most reliable, rugged, and technically advanced fusion equipment in the world. McElroy is the leader in the design and manufacture of fusion machines for pipe as small as ½” CTS to as large as 2000mm OD. SECOR is proud to be a leading McElroy distributor and maintain one of the largest Certified McElroy Rental Fleets in the world. Whether it’s a McElroy Pit Bull, TracStar, or a wheeled unit, SECOR rents and sells fusion machines for every application.