| Model Code | Description | |
|---|---|---|
| 01 | 601.900, 602.900, 603.950 | OUTLET TOWARDS FRONT, WITH CONNECTION TO EXPANSION TANK |
| 02 | 601.900, 602.900, 603.950 | OUTLET UPWARD, LESS CONNECTION TO EXPANSION TANK |
| 03 | 601.900, 602.900, 603.950 | OUTLET TOWARDS FRONT, LESS CONNECTION TO EXPANSION TANK |
| 06 | 601.900, 602.900, 603.950 | OUTLET TOWARDS FRONT, LESS CONNECTION TO EXPANSION TANK AND TEMPERATURE SENDER UNIT |