Lelit selfignition valve 18m18f mc111

What is a check valve

A check (non-return) valve is a small one-way component in the hydraulic circuit of a coffee machine that lets water or steam flow in only one direction. It prevents pressure or liquid from flowing back into the pump, boiler, or circuit it has just passed through, keeping the system pressure stable.

When the part stops doing its job

• Fluctuating or insufficient pressure during coffee preparation
• Water leaking back toward the pump or from the connection when the machine is switched off
• Uneven water flow, slow or inconsistent boiler filling
• Unusual pump noise caused by back pressure

Why timely replacement pays off

A worn or leaking check valve puts strain on the pump and can cause uneven pressure during extraction, affecting the quality and consistency of the coffee. Long-term neglect can also lead to increased wear of other parts of the hydraulic circuit.

How to choose the right part

Check valves differ in thread type and connection method, so it is important to verify the exact dimensions and compatibility with your specific coffee machine model in the product table.

Compatible with

• DIANA (PL60 2013)
• DIANA (PL60PLUST)
• PL60PLUSTD
• GIULIETTA (PL2S)
• MARA (PL62)
• MARA (PL62S)
• SILVANA (PL61)