Ideal Automatic Air Vent 173813

Keep your Ideal boiler free from trapped air and nuisance lockouts. This OEM automatic air vent (AAV) continuously purges air from the hydraulic circuit, helping maintain stable pressure, quiet operation and efficient circulation.

Why this part matters

• Prevents air locks: Float-operated valve bleeds microbubbles automatically to protect pumps, heat exchangers and sensors.
• OEM fit & finish: Direct replacement for the original 173813 ventno adaptors or modifications required.
• Service-friendly cap: Top cap allows isolation during filling/servicing; simply crack open a quarter turn for normal use.

Typical Compatibility*

• Ideal Mini C24, C28, C32
• Ideal Mini S24, S28
• Ideal Mini HE C24, C28, C32
• Also listed for Europa 224 / 228 / 232 (check your parts list)

Symptoms that point to a failed AAV

• Gurgling or sloshing noises from the boiler
• Frequent lockouts after bleeding radiators
• Visible leakage from the vent cap or body
• System pressure rising/falling erratically due to trapped air

What’s in the box

• 1 Automatic air vent assembly (Ideal 173813)

Installation & Safety

This component must be fitted and commissioned by a qualified, Gas Safe registered engineer. After fitting, open the service cap slightly and verify there are no leaks at operating temperature and pressure.