Worcester Lpg Boiler Expansion Vessels (Page 2)
The expansion vessel is a small chamber that is used to protect closed water heating systems from pressure surges. The tank is filled with air that acts as a cushion against pressure surges within the system.
WORCESTER 77161921580 35CDI-MINI EXPANSION VESSEL KIT
Part No: 1011491 / MPN: 77161921580
WORCESTER 77161921970 25/28SI - MINI EXPANSION VESSEL KIT
Part No: 1011527 / MPN: 77161921970