| company | role | hq | verified |
|---|
| Boyd Engineering Co. boydeng.com | DIST | — (US) | 1 mfrs |
| CHC chchydro.com | DIST | Anchorage, AK (US) | 1 mfrs |
| Cummins-Wagner cummins-wagner.com | MFG DIST | Annapolis Junction, MD (US) | 1 mfrs |
| Dawson Company dawsonco.com | MFG DIST | Pomona, CA (US) | 1 mfrs |
| FIA fiainc.com | DIST | Woburn, MA (US) | 1 mfrs |
| Frank P. Langley Co. fplco.com | DIST | Amherst, NY (US) | 1 mfrs |
| George A. Israel Jr. georgeaisraelinc.com | DIST | FL (US) | 1 mfrs |
| Gritton and Associates gritton.com | DIST | Salt Lake City, UT (US) | 1 mfrs |
| Hydro-Flo Products, Inc. hydro-flo.com | DIST | Brookfield, WI (US) | 1 mfrs |
| Hydronic & Steam Equipment Co., Inc. hydstm.com | DIST | Indianapolis, IN (US) | 1 mfrs |
| Hydronic Technology Inc. hydronictechnology.com | DIST | New Orleans, LA (US) | 1 mfrs |
| James M. Pleasants Company jmpco.com | DIST | — (US) | 1 mfrs |
| J & B Sales Company j-bsalesco.com | DIST | AZ (US) | 1 mfrs |
| McNevin Company mcnevinco.com | DIST | Denver, CO (US) | 1 mfrs |
| Mulcahy Company, Inc. mulcahyco.com | DIST | Eagan, MN (US) | 1 mfrs |
| Products, Inc. products-inc.com | DIST | West Des Moines, IA (US) | 1 mfrs |
| R. D. Bitzer Company rdbitzer.com | DIST | — (US) | 1 mfrs |
| R. L. Deppmann Company deppmann.com | DIST | — (US) | 1 mfrs |
| Steffens-Shultz, Inc steffens-shultz.com | DIST | Columbus, OH (US) | 1 mfrs |
| Syracuse Thermal Products, Inc. syracusethermal.com | DIST | — (US) | 1 mfrs |