| Jenkins & Mc Mahon Plumbing (Toughkenamon, PA)
|
| Jenkins Plumbing Supply (Lakewood, NY)
|
| Jet Products Inc (West Carrollton, OH)
|
| Jiffy-Tite Co (Lancaster, NY)
|
| Jns Heating Svc (Holbrook, NY)
|
| Joseph F O'Hora & Sons Inc (Scranton, PA)
|
| K B Backflow Inc (Kokomo, IN)
|
| Kennedy Valve Mfg Co (Elmira, NY)
|
| Kenny Pipe & Supply Inc (Lexington, KY)
|
| Kerotest Manufacturing Corp (Pittsburgh, PA)
|
| Kessler Sunbelt Distribution (Clinton, IL)
|
| King Mechanical Specialty (Newburgh, IN)
|
| L H Ehrmann Co (Coal City, IN)
|
| L Robbins & Assoc (Lafayette, IN)
|
| Lake County Hose & Equipment (Waukegan, IL)
|
| Lake Michigan Wind & Sun Ltd (Sturgeon Bay, WI)
|
| Lakeshore International (La Grange Park, IL)
|
| Lakeshore Supply (Fulton, NY)
|
| Lance Valves (Lancaster, NY)
|
| Las Supply (Long Island City, NY)
|
| Levin's Crosstown Supply Corp (Bronx, NY)
|
| Lighting & Bath Shop Inc (Glasgow, KY)
|
| Lilly Steam Trap Co Inc (Itasca, IL)
|
| Linox Gas Tech (Hillside, IL)
|
| Lint Busters (Yorktown Heights, NY)
|
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