Amfa4000
Valve Head O-Ring / Seal Leak
Water leaking from around the top valve head of the Amfa4000
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Damaged main tank-to-valve O-ring, Cracked valve head body, Over-tightened plumbing stressing the head, Debris on sealing surfaces
How to Fix / Troubleshooting
Safety first: Disconnect power, close inlet and outlet valves, and relieve pressure by opening a downstream tap. Water may spill when removing the valve head.
- 1. Dry and inspect: Wipe the area dry and observe where water reappears to confirm the leak source.
- 2. Remove valve head: Follow Amfa4000 service instructions to unclamp or unscrew the valve head from the resin tank.
- 3. Inspect O-ring and tank neck: Check the large O-ring for nicks, flattening, or chemical damage. Clean the tank neck and valve base.
- 4. Replace O-ring: Install a new Amfa4000 tank O-ring, lightly lubricated with silicone grease approved for potable water.
- 5. Reassemble and test: Refit the valve head, restore water slowly, and check for leaks.
If the valve body itself is cracked, replace the entire valve head assembly.
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Repair Difficulty
Hard
4/5
Required Part
Amfa4000 Tank-to-Valve O-Ring
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