POTTERTON PROMAX COMBI 28 HE PLUS MAGNETIC FLOW SWITCH & 5114710
MAIN COMBI FLOW SWITCH HALL EFFECT SENSOR SET & 5114710 5114767. POTTERTON GOLD COMBI 30 HE. POTTERTON PROMAX COMBI 24 HE PLUS. POTTERTON PROMAX COMBI 24 HE PLUS LPG. POTTERTON PROMAX COMBI 28 HE PLUS.