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42479 Water Seal – Usage
What it is: Water seal kit for Annovi-Reverberi (AR) high-pressure pumps.
What’s inside: High-pressure seals, low-pressure seals, O-rings, brass rings (for 3 pistons).
Where it’s used: AR pump models like AR767 and similar 3-piston pumps.
Function:
Prevents water leakage inside the pump.
Maintains pump pressure.
Protects pistons and pump head from wear.
When to replace: If pump loses pressure or water leaks past pistons.