IT FITS FOR Potterton ENVOY SYSTEM 40
Potterton ENVOY SYSTEM 50
Potterton ENVOY SYSTEM 60
Potterton ENVOY SYSTEM 80
Potterton SUPRIMA 100
Potterton SUPRIMA 30
Potterton SUPRIMA 30 SYSTEM BOILER KIT
Potterton SUPRIMA 40
Potterton SUPRIMA 50
Potterton SUPRIMA 60
Potterton SUPRIMA 70
Potterton SUPRIMA 80