Expansion valve 18m 8 mm

The expansion valve (over-pressure valve, OPV) La Pavoni part number 5036751 is a component rated at 18 bar with an 8 mm connection that regulates water pressure during espresso brewing. Customers most commonly search for it when water starts leaking into the drip tray or when the machine has lost the required pressure. If you are seeing these symptoms, this valve is typically the correct replacement part.

Important — verify your model: before ordering, confirm the exact model and version of your La Pavoni machine using the rating plate (type label), which is usually located on the underside of the appliance or behind the water tank. Cross-reference part number 5036751 and the specifications 18 bar / 8 mm against your machine to ensure the valve will fit correctly.

When does this part need replacing? (Fault symptoms)

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

• Water leaking into the drip tray or escaping from under the machine even during brewing
• The machine has lost pressure — espresso flows weakly, drips, or produces no proper crema
• The machine emits unusual hissing sounds due to pressure escaping through a faulty valve
• The pressure gauge reading fluctuates or fails to reach the working value of approximately 9 bar

Compatibility: Which models is this part for?

This expansion valve is intended for La Pavoni machines with an 8 mm connection and an opening pressure of 18 bar.

La Pavoni

• La Pavoni spare part, part number 5036751

Note on exact compatibility: no list of specific machine models was supplied with this part. Please verify fitment by the part number 5036751 and the specifications (18 bar, 8 mm) shown on your machine or in its technical exploded diagram. If you are unsure, contact our technical support team and we will be happy to confirm whether this part fits your specific model.

Genuine vs. compatible part

Brewive supplies this expansion valve as a genuine La Pavoni spare part, part number 5036751. A genuine part guarantees correct dimensions and opening pressure, giving you confidence in an exact fit and reliable performance after installation.

Delivery and returns

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