This part fits: * POTTERTON FRENCH TYPE 1B (GAS ARRANGEMENT) * POTTERTON ENVOY FLOWSURE + FLOWSURE PLUS (GAS ARRANGEMENT) * POTTERTON () * POTTERTON ENVOY SYSTEM 40 (GAS ASSY) * POTTERTON ENVOY SYSTEM 50 (GAS ASSY) * POTTERTON ENVOY SYSTEM 60 (GAS ASSY) * POTTERTON ENVOY SYSTEM 80 (GAS ASSY) * POTTERTON 30-60 F SIDE OR REAR FLUE SEAL (SYSTEM SEALED BOILER ASSY) * POTTERTON 30-60 F SIDE OR REAR FLUE SEAL (SYSTEM SEALED BOILER ASSY) * POTTERTON RODIAC PROFIT HR RUNNER (GAS ASSY) * POTTERTON SUPRIMA 100 (WALL FRAME, EXPANSION VESSEL &) * POTTERTON SUPRIMA 30 (EXPANSION VESSEL) * POTTERTON SUPRIMA 30 SYSTEM BOILER KIT (FRAME MODULE ASSY) * POTTERTON SUPRIMA 30 SYSTEM BOILER KIT (FRAME MODULE ASSY - DV) * POTTERTON SUPRIMA 30 SYSTEM BOILER KIT ( (FRAME MODULE ASSY - DV) * POTTERTON SUPRIMA 40 (EXPANSION VESSEL) * POTTERTON SUPRIMA 50 (EXPANSION VESSEL) * POTTERTON SUPRIMA 60 (EXPANSION VESSEL) * POTTERTON SUPRIMA 70 (EXPANSION VESSEL) * POTTERTON SUPRIMA 80 (EXPANSION VESSEL)