Hot Water Expansion Vessel – 18L (White, Wall-Mounted)

Function:

• Wall-mounted expansion vessel designed for hot water systems

• Absorbs pressure fluctuations as water heats and expands, protecting pipework and components

• Helps maintain stable pressure within the unvented system and prevents activation of safety components

Specifications:

• Capacity: 18 Litres

• Color: White

• Mounting: Wall-mounted

• Connection Size: ¾" BSP

• System Type: Hot Water (Potable)

Common Fault Symptoms:

• Vessel fails to hold pressure (no air cushion)

• Causes cold water combination valve arrangements (e.g. Part No. 524277) to be placed under excessive stress

• Leads to pressure relief valves (PRVs) failing or constantly passing

Application:

• Replacement is recommended during annual service or when system pressure issues, PRV weeping, or cold water valve wear are observed

• Should be pre-charged to match system pressure before installation