This part fits the following boilers:
| Fits Appliance(s) | GC No. | |
| Alpha CB24 | - | 47-532-15 |
| Alpha CB24X | - | 47-532-14 |
| Alpha CB28 | - | 47-532-16 |
| Alpha CB28X | - | 47-532-17 |
| Alpha CD24C | - | 47-532-19 |
| Alpha CD32C | - | 47-532-21 |
| Alpha HE CB 25 | - | 47-532-25 |
| Alpha HE CB 33 | - | 47-532-26 |