This part fits: FERROLI XIGNAL (SHORT PARTS LIST) FERROLI XIGNAL (HEAT EXCHANGER FOR CH & DHW &) FERROLI TEMPRA (SHORT PARTS LIST) FERROLI TEMPRA (HEAT EXCHANGER & PUMP) FERROLI SYS 10-23 (SHORT PARTS LIST) FERROLI SYS 10-23 (HEAT EXCHANGER & PUMP) FERROLI OPTIMAX 25 S (SHORT PARTS LIST) FERROLI OPTIMAX 25 S (HEAT EXCHANGER & PUMP) FERROLI OPTIMA 2001 (SHORT PARTS LIST) FERROLI OPTIMA 2001 (HEAT EXCHANGER & PUMP) FERROLI OPTIMA 2000 (SHORT PARTS LIST) FERROLI OPTIMA 2000 (HEAT EXCHANGER & PUMP) FERROLI OPTIMA 1001 (SHORT PARTS LIST) FERROLI OPTIMA 1001 (HEAT EXCHANGER & PUMP) FERROLI OPTIMA 1000 (SHORT PARTS LIST) FERROLI OPTIMA 1000 (HEAT EXCHANGER - PUMP) FERROLI OPTIMA 901 (SHORT PARTS LIST) FERROLI OPTIMA 901 (HEAT EXCHANGER & PUMP) FERROLI OPTIMA 900 (SHORT PARTS LIST) FERROLI OPTIMA 900 (HEAT EXCHANGER - PUMP) FERROLI OPTIMA 801 (SHORT PARTS LIST) FERROLI OPTIMA 801 (HEAT EXCHANGER & PUMP) FERROLI OPTIMA 800 (SHORT PARTS LIST) FERROLI OPTIMA 800 (HEAT EXCHANGER - PUMP) FERROLI OPTIMA 701 (SHORT PARTS LIST) FERROLI OPTIMA 701 (HEAT EXCHANGER & PUMP) FERROLI OPTIMA 700 (SHORT PARTS LIST) FERROLI OPTIMA 700 (HEAT EXCHANGER - PUMP) FERROLI OPTIMA 601 (SHORT PARTS LIST) FERROLI OPTIMA 601 (HEAT EXCHANGER & PUMP) FERROLI OPTIMA 201 (SHORT PARTS LIST) FERROLI OPTIMA 201 (HEAT EXCHANGER & PUMP) FERROLI OPTIMA 200 (SHORT PARTS LIST) FERROLI OPTIMA 200 (HEAT EXCHANGER - PUMP) FERROLI OPTIMAX 25 C (SHORT PARTS LIST) FERROLI OPTIMAX 25 C (HEAT EXCHANGER & PUMP) FERROLI MODENA 80 E MF01 (SHORT PARTS LIST) FERROLI MODENA 80 E MF01 (HEAT EXCHANGER & PUMP) FERROLI MODENA 80 E MF02 (SHORT PARTS LIST) FERROLI MODENA 80 E MF02 (HEAT EXCHANGER & PUMP) FERROLI MAXIMA 35 C (SHORT PARTS LIST) FERROLI MAXIMA 35 C (HEAT EXCHANGER & PUMP) FERROLI MAXIMA 35 S (SHORT PARTS LIST) FERROLI MAXIMA 35 S (HEAT EXCHANGER & PUMP) FERROLI HAWK 11 (SHORT PARTS LIST) FERROLI HAWK 11 (HEAT EXCHANGER & PUMP) FERROLI DOMINA 80E (MF01) (SHORT PARTS LIST) FERROLI DOMINA 80E (MF01) (HEAT EXCHANGER & PUMP) FERROLI DOMINA 80E (MF02) (SHORT PARTS LIST) FERROLI DOMINA 80E (MF02) (HEAT EXCHANGER & PUMP) FERROLI ARENA 30A (SHORT PARTS LIST) FERROLI ARENA 30A (EXPANSION VESSEL - PUMP) FERROLI ARENA 30C (SHORT PARTS LIST) FERROLI ARENA 30C (HEAT EXCHANGER) FERROLI COMBI 77 CF (SHORT PARTS LIST) FERROLI COMBI 77 CF (HEAT EXCHANGER - PUMP) FERROLI COMBI 77 FF (SHORT PARTS LIST) FERROLI COMBI 77 FF (HEAT EXCHANGER - PUMP) FERROLI COMBI 77 FF/POPULAR (SHORT PARTS LIST) FERROLI COMBI 77 FF/POPULAR (HEAT EXCHANGER - PUMP) FERROLI COMBI 100 FF (SHORT PARTS LIST) FERROLI COMBI 100 FF (HEAT EXCHANGER - PUMP) FERROLI COMBI 76 FF (SHORT PARTS LIST) FERROLI COMBI 76 FF (HEAT EXCHANGER FOR CH & DHW &) ARENA 20 - 30A (WATER LINE ASSY) ARENA 20 - 30 C (WATER LINE ASSY)