The Baxi 5114691 Expansion Vessel (8-Litre CIMM) is a crucial component designed to maintain stable system pressure within your central heating boiler. It absorbs excess water pressure as the system heats and cools, helping prevent damage, leaks, and unnecessary strain on internal components.

Engineered for reliability and manufactured to high standards, this vessel ensures consistent performance and efficient operation across a range of Baxi boilers.

Key Features

• Genuine Baxi 8L CIMM expansion vessel

• Helps regulate and stabilise boiler pressure

• Essential for preventing over-pressurisation

• Supports long-term heating system efficiency

• Designed for easy replacement and straightforward installation

Compatible With

This expansion vessel is suitable for a range of Baxi boilers, including:

• Baxi Duo-Tec Combi

• Baxi Megaflo System

• Baxi Platinum Combi

Always confirm the part number (5114691) with your boiler manual or existing component to ensure correct fitment.