This part fits the following boilers:
| Fits Appliance(s) | GC No. | |
| Potterton British Gas 30 F2 | - | 41-589-74 |
| Potterton British Gas 40 F2 | - | 41-589-77 |
| Potterton British Gas 50 F2 | - | 41-589-78 |
| Potterton British Gas 60 F2 | - | 41-589-81 |
| Potterton British Gas 80 F2 | - | 41-589-97 |
| Potterton Celsia 30 F1 | - | 41-589-63 |
| Potterton Celsia 40 F1 | - | 41-589-68 |
| Potterton Celsia 50 F1 | - | 41-589-69 |
| Potterton Celsia 60 F1 | - | 41-589-70 |
| Potterton Celsia 80 F1 | - | 41-589-73 |
| Potterton Netaheat Profile 30E | - | 41-605-39 |
| Potterton Netaheat Profile 40E | - | 41-605-40 |
| Potterton Netaheat Profile 50E | - | 41-605-41 |
| Potterton Netaheat Profile 60E | - | 41-605-42 |
| Potterton Netaheat Profile 80E | - | 41-605-43 |
| Potterton Profile (Prima) 100E LPG | - | 41-605-79 |
| Potterton Profile (Prima) 50E LPG | - | 41-605-76 |
| Potterton Profile (Prima) 60E LPG | - | 41-605-77 |
| Potterton Profile (Prima) 80E LPG | - | 41-605-78 |
| Potterton Profile 100E (Sit) | - | 41-607-49 |
| Potterton Profile 100E (WR) | - | 41-605-65 |
| Potterton Profile 100E LPG | - | 41-605-69 |
| Potterton Profile 40EL | - | 41-590-50 |
| Potterton Profile 50E LPG | - | 41-605-66 |
| Potterton Profile 50EL | - | 41-590-51 |
| Potterton Profile 60E LPG | - | 41-605-67 |
| Potterton Profile 60EL | - | 41-590-52 |
| Potterton Profile 80E LPG | - | 41-605-68 |
| Potterton Profile 80EL | - | 41-590-53 |
| Potterton Profile Prima 100E | - | 41-605-75 |
| Potterton Profile Prima 30E | - | 41-605-70 |
| Potterton Profile Prima 40E | - | 41-605-71 |
| Potterton Profile Prima 50E | - | 41-605-72 |
| Potterton Profile Prima 60E | - | 41-605-73 |
| Potterton Profile Prima 80E | - | 41-605-74 |
| Potterton Scottish Gas 30 F2 | - | 41-589-98 |
| Potterton Scottish Gas 40 F2 | - | 41-589-99 |
| Potterton Scottish Gas 50 F2 | - | 41-590-08 |
| Potterton Scottish Gas 60 F2 | - | 41-590-09 |
| Potterton Scottish Gas 80 F2 | - | 41-590-23 |
| Sime Superior MKI 100 | - | 41-719-05 |
| Sime Superior MKI 40 | - | 41-719-01 |
| Sime Superior MKI 50 | - | 41-719-02 |
| Sime Superior MKI 60 | - | 41-719-03 |
| Sime Superior MKI 80 | - | 41-719-04 |