The Vaillant 180904 is a genuine OEM packing ring designed for use in selected Vaillant VU system boilers. This sealing component provides a reliable, airtight and watertight connection between key hydraulic or combustion parts, helping to prevent leaks, maintain system pressure, and support safe, efficient boiler operation.

Over time, packing rings can become worn, flattened, or brittle due to heat and system pressure. Replacing them with genuine Vaillant seals ensures proper fitment, long-term durability, and optimal boiler performance.

Key Features:

• Genuine Vaillant packing ring (seal)

• Designed specifically for VU system boilers

• Ensures airtight and watertight sealing

• Helps prevent leaks and maintain stable operating pressure

• Manufactured to Vaillant’s strict OEM quality standards

• Durable, heat-resistant construction

• Direct-fit replacement for professional installation

Compatibility

The Vaillant 180904 Packing Ring is suitable for:

• Vaillant VU system boilers

• Any appliance listing 180904 in the official Vaillant parts documentation

Engineers should always confirm model compatibility via the boiler’s service manual or parts list.