Mechanical Research - Source for inflatable and mechanical pipe test plugs, inflatable and annular seals as well as bulkheads. - http://www.mechanicalresearch.com/
Stemar Equipment & Supply Co., Inc. - For pipeline and utility contractors. Pipe plugs, sewer pipe plugs, pipeline acceptance and testing equipment, pipe leak locating equipment. Also, contractor hardware and supplies. - http://www.stemarinc.com/
Vanderlans & Sons, Inc. - Offers a complete line of test plugs and flow-thru plugs in single and multi sizes. Also available are joint testers, high pressure plugs and air and vacuum testing equipment. - http://www.lansas.com/
Petersen, Inc. - Distributor of specialty pipe plugs for pipeline and plumbing contractors. - http://www.pipeplug.com/
Sarco Stopper Limited - Manufacture under pressure pipe stoppers and bagging-off systems for gas, water and other service pipes. Allows repair of pipes without loss in supply. Available world wide. - http://www.sarco-stopper.com/
Buchen Inc - Manufacturer of inflatable pipe plugs, bypass plugs and accessories used for testing, plugging and bypassing in sewer lines. - http://www.buchen.com/
Cherne Industries - Manufactures and sells pipe plugging and testing equipment, pipe lubricant, primers, and cements . - http://www.cherneind.com/