Water Overflowing Above Piston

When the piston bleed valve does not seal correctly, water can enter into the area above the piston. During the air-bleed process, the steel ball inside the bleed valve should float up and press against an O-ring to form a seal. If this does not happen, there are two likely scenarios:

Scenario 1: Low Boiler Pressure During Chamber Fill

If boiler pressure is too low, the bleed valve may remain open, allowing water to flow through. This commonly happens if the lever is paused halfway during air bleeding while boiler pressure is too low.

How to Check:

Verify your boiler pressure on the boiler gauge. Usually this issue will occur if boiler pressure is below 1-1.5bar

Fix:

• Once you see water in the area above the piston, the chamber is full - at this point, continue with your shot. The piston’s downward pressure should close the bleed valve, stopping water flow.
• Any water above the piston will naturally drip down after the shot.

To prevent this issue in future shots, avoid holding the lever halfway.

• In Direct Mode: raise the lever fully during the fill
• In Spring Mode: lower the lever completely during the fill

Scenario 2: Bleed Valve Malfunction

How to Inspect & Service:

1. Remove the piston to access the bleed valve at its base.
2. Use the included 3 mm Allen key to remove the valve. Inside, you’ll find an O-ring and a ball bearing.
3. Clean all components and reassemble.

Below is how the parts are arranged within the valve.