DeLonghi safety valve

The De'Longhi safety valve (part no. AS00009453) is an overpressure valve with a valve connector mounted directly on the pump of your pump-driven espresso machine. Customers most commonly search for it when water starts leaking from the machine or when the pump runs but coffee flows weakly. If the original valve is scaled up or no longer sealing correctly, this is the right replacement part.

Important — verify your model: Before ordering, check the exact model and version on the rating plate (type plate). The label is usually found on the underside of the machine or behind the water tank. The type designation and version code from the rating plate will confirm that this part fits your specific machine.

When Does This Part Need Replacing? (Fault Symptoms)

This part typically fails when you notice one or more of the following symptoms:

• Water leaks from underneath the machine or into the drip tray even when no coffee is being prepared
• Coffee flows very slowly, drips, or does not flow at all
• The pump is audibly running (humming) but little or no water reaches the cup
• The machine loses pressure, espresso is watery and has no crema

These symptoms are consistent with a failed overpressure valve downstream of the pump. When limescale builds up on the path between the pump and the valve, or when the valve stops sealing, some water escapes outside the brewing circuit — which is why coffee flows weakly and water appears underneath the machine.

Compatibility: Which Models Is This Part For?

This safety valve with valve connector is intended for selected De'Longhi pump-driven espresso machines with portafilter, on which the valve is mounted directly on the pump.

De'Longhi Pump-Driven Espresso Machines with Portafilter

• Compatible with selected De'Longhi pump-driven espresso machines with portafilter where the overpressure valve is located directly on the pump

As we do not have a complete list of model codes supplied for this part, please verify exact compatibility using the type designation on your machine's rating plate. If you are unsure, contact our technical support team and we will confirm fitment based on your rating plate code.

Original vs. Compatible Part

This is a De'Longhi replacement safety valve under part no. AS00009453, serving as a direct replacement for the original valve on the pump. The seal for the hose connector (item no. 63444D) is not included — if you need to replace it at the same time as the valve, order it separately. We are happy to help you verify the correct part for your machine when you place your order.

Delivery and Returns

The part is in stock with dispatch within 24 hours from the EU, and expert technical support from our service technicians is available. An unused and uninstalled part may be returned within 14 days (statutory right of withdrawal).