Filtration
| Filtration |
|---|
| Aeration Industries |
| Air Engineering |
| Air Flow Technologies |
| AO Smith |
| AquaChem |
| Blue Planet |
| Clack Corporation |
| Depuron |
| Electrozone |
| Fehr Graham |
| Great Lakes Bio Systems |
| ITT-Sanitaire |
| J & Y Enterprises |
| Kasco Marine |
| Pentair |
| Portapure |
| Red Flint |
| Siemens (Envirex) |
| Siemens (Zimpro) |
| Spec Industries |
| UV Devices |