Understanding Your Serial Number
Listed below is a cross reference for the numerical model number as displayed in the serial number to the corresponding product model.
| Numerical Model Number | Product Model Name |
| 001 | EP 201 Pump |
| 002 | EP 100 Pump |
| 003 | EP 203 Pump |
| 004 | EP 301 Pump |
| 005 | EP 303 Pump |
| 006 | CRV Modulating Controller |
| 008 | UltraVac Controller |
| 027 | CRV-B / CRVSF |
| 030 | CTH2 / ET1 |
| 031 | CTH2V |
| 032 | HE |
| 034 | CTH3 |
| 036 | CTH2D / AG |
| 037 | HED |
| 038 | HEV |
| 039 | HEM |
| 051 | EV |
| 052 | CTHN |
| 071 | BH / ETBH |
| 073 | DF |
| 077 | GordonRay NP |
| 080 | CGTH |
| 090 | TF / ET2 |