Worcester Air Vent Valve 87161064450

Air Vent Valve Worcester Fits a number of Worcester Boilers

The Worcester Air Vent Gasket (Part No. 87161064450) is a genuine OEM (Original Equipment Manufacturer) sealing component designed specifically for the automatic air vent (AAV) assembly in Worcester Bosch Greenstar boilers. This gasket provides a pressure-tight seal between the air vent body and the hydraulic manifold or heat exchanger. Its primary role is to ensure that while air is being bled from the system, no water or system pressure escapes from the connection point.

Key Features and Specifications
High-Temperature Resistance: Manufactured from a specialized synthetic rubber or fiber-based compound (depending on the revision) to withstand the high temperatures of the primary heating circuit.

Precision Profile: Designed to seat perfectly under the automatic air vent, ensuring uniform compression and a leak-free interface.

Genuine Worcester Bosch Part: Guaranteed to handle the constant thermal expansion and contraction cycles of a domestic boiler.

Corrosion Resistance: Chemically resistant to system inhibitors and central heating additives.

Essential Maintenance Part: A vital component to replace whenever the air vent is removed or replaced to prevent "weeping" leaks.

Boiler Compatibility
This gasket is used across a wide range of Worcester Bosch appliances where an internal automatic air vent is utilized:

Greenstar CDi (Classic & Highflow): 25CDi, 30CDi, 35CDi, 40CDi, 42CDi.

Greenstar i Junior: 24i Junior, 28i Junior.

Greenstar Si: 25Si, 30Si.

Greenstar Ri: 12Ri, 15Ri, 18Ri, 24Ri.

Worcester 240 / 280 / 350: Legacy models utilizing the internal air bleed system.

Technical Tip: Automatic air vents are a common point for slow leaks as they age. If you notice white "salt" deposits or staining around the top of your boiler's pump or heat exchanger, the air vent or this 87161064450 gasket is likely failing. Always replace the gasket when fitting a new air vent to ensure the repair is permanent.

Essential Companion Products
To ensure a professional and secure hydraulic repair, the following genuine Worcester parts are frequently checked or replaced alongside this gasket:

Hydraulic Control: Worcester Membrane – 87155058250

Ignition Part: Worcester Electrode – 87161063560

Water Sealing: Worcester O-Ring – 87161138510

External Weathering: Worcester Wall Seal 160mm (Black) – 87161112120

Hardware: Worcester Retaining Nut – 87161066830

Specialist Support and Local Collection
Are you struggling with a persistent air lock or a slow leak from the top of your boiler? Our trade counter team can help you identify if you need a new air vent assembly or simply a replacement gasket to restore system integrity.

Visit our trade counter and Bathroom Showroom at 61 Fullers Road, E18 2QB for expert technical advice and immediate access to genuine Worcester Bosch spares.