This part fits the following boilers:
| Worcester Bosch Highflow 400 Electronic FSN (RSF) (GC No. 47-311-61) |
| Worcester Bosch Highflow 400-FSN-GB (RSF) (GC No. 47-311-18) |
| Worcester Bosch Highflow 400 Electronic FSP (RSF) (GC No. 47-311-64) |
| Worcester Bosch Highflow 400-FSP-GB (RSF) (GC No. 47-311-21) |
