Lelit Mara X: How to Replace the Expansion Valve

by Whole Latte Love 1 min read Updated: March 5, 2025

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The expansion valve, also known as the Over Pressure Valve (OPV), is a critical component of your Lelit Mara X espresso machine. It regulates the hydraulic and brew pressure to ensure optimal extraction of espresso. Over time, the OPV may need replacement due to issues like leaking, not opening, or making a screeching noise. This guide will help you understand why and how to replace the OPV on your Lelit Mara X.