Expansion Vessels: Small Component, Big Role
14 October 2026 | Leyton Boilers
The vessel absorbs water expansion as it heats. Bladder failure lets pressure spike, causing leaks via the safety valve. Testing takes minutes during a service.
Replacement is straightforward when caught early and prevents recurring pressure faults.
Our engineers test expansion vessels on every comprehensive boiler service.
Need professional help?
Leyton Boilers provides Gas Safe registered boiler servicing, repairs, and installations across London.
07429 031 444 Contact us