Conti Espresso Machine 2-Way Boiler Fill Solenoid Valve – Commercial Replacement

What Is a 2-Way Boiler Fill Solenoid Valve?

The 2-way fill solenoid valve (also called the boiler inlet solenoid or autofill solenoid) controls the flow of water from the mains supply into the boiler of your Conti commercial espresso machine. When the boiler water level drops, this valve opens to refill it automatically. A faulty fill solenoid can cause the boiler to overfill, fail to fill, or trigger low-water errors — making it a critical component for reliable machine operation.

Compatible Conti Models

• Conti CC100 Compact
• Conti CC100 Standard
• Conti CC100 SA / SAM
• Conti Montecarlo
• Conti X-One
• Conti X-One TCI

Specifications

• Type: 2-way (normally closed) solenoid valve
• Function: Boiler autofill / water inlet
• Brand: Conti
• Weight: 300g

Symptoms of a Faulty Boiler Fill Solenoid

• Machine displaying low water or boiler error codes despite adequate water supply
• Boiler not refilling after extraction — steam pressure dropping and not recovering
• Boiler continuously overfilling — water spitting from steam wand
• Audible clicking or buzzing from the solenoid with no water flow
• Water leaking from the solenoid body or fittings

How to Replace a Boiler Fill Solenoid Valve

1. Isolate the machine from power and water supply; allow it to cool and depressurise
2. Drain the boiler before disconnecting any water lines
3. Locate the fill solenoid on the boiler inlet — typically connected to the water inlet line and the autofill probe circuit
4. Disconnect the electrical coil connector and water fittings
5. Fit the replacement valve, apply thread tape to BSP fittings, and reconnect all lines
6. Restore water supply and power; test autofill operation and check for leaks

Tip: If the machine fills but won’t stop, check the autofill probe and level controller before replacing the solenoid — the valve may not be the root cause.

Why Buy From Bear Coffee Machine?

• Genuine Conti-compatible boiler fill solenoid valves
• Fast shipping from Sydney, Australia
• Technical support available — we can help diagnose fill issues before you order