Safety: Immediately place the unit in bypass and relieve pressure. Unplug the unit before working on leaks.

Steps:

Identify leak source: Dry the area and observe where water reappears. Check around the valve-to-tank connection, plumbing fittings, and top of the tank.
Check plumbing stress: Ensure rigid piping is not putting side load on the valve. Support piping as needed.
Inspect valve-to-tank O-ring: Remove the Clack valve from the mineral tank. Inspect the large O-ring at the tank neck for cuts or flattening. Replace the valve-to-tank O-ring if damaged.
Examine tank neck and valve body: Look for cracks in the fiberglass tank neck or plastic valve body. Replace the mineral tank or valve body if cracked.
Reassemble and test: Lubricate new O-rings with silicone grease, reinstall the valve, slowly pressurize the system, and check for leaks.

Warning: Do not overtighten threaded fittings into the valve body; use proper thread sealant and torque to avoid cracking.

Clack water softener leaks water from around the valve body or top of the mineral tank.

Possible Causes