The Ideal 175551 Expansion Vessel Kit is a genuine replacement expansion vessel designed to maintain stable water pressure within compatible Ideal boilers. As water heats and expands, the expansion vessel absorbs the excess pressure, protecting the boiler and heating system from unnecessary strain, leaks, and over-pressurisation.

A failing or waterlogged expansion vessel can cause pressure spikes, repeated pressure loss, PRV discharge, noisy operation, or boiler lockouts. Replacing it with this genuine Ideal kit restores correct pressure management and ensures smooth, reliable system performance.

Key Features

• Genuine Ideal expansion vessel kit

• Maintains stable system pressure during heating cycles

• Prevents over-pressurisation and PRV discharge

• Helps resolve pressure loss, heating inefficiency, and lockout issues

• Built to Ideal’s specifications for long-term reliability

• Direct-fit replacement for straightforward installation

Compatible With

This expansion vessel kit is suitable for:

• Ideal Independent C

• Ideal Code Combi

• Ideal i-Mini

Please verify the part number (175551) with your boiler manual or existing vessel to ensure correct compatibility.