Potterton Air Bleed Valve 10/18728 was 929514
This is used on Ultra 2 Range, Puma 80 (sit) Puma 80E (sit) Puma 100 (sit)
Puma 100E (sit) and Puma Flowsure +
Ref: 10/18728
Potterton Automatic Air Vent 26009104
This is used on the Statesman Flowsure. Statesman Flowsure + and Stateman System
Ref: 26009104