Clack water softener’s bypass valve is difficult to turn or will not move.

Safety: Do not force the bypass handle with tools; you may crack the body and cause a major leak. Shut off main water if necessary.

Steps:

• Relieve pressure: Turn off the main water supply and open a faucet to relieve pressure before attempting to move the bypass.
• Gentle movement: Try gently working the bypass handle back and forth. If it begins to move, cycle it several times to loosen deposits.
• Inspect for leaks or cracks: If the bypass body shows signs of cracking or leakage, replace the entire Clack bypass valve assembly.
• Service or replace: Some bypass designs allow disassembly and O-ring replacement. If serviceable, replace O-rings and lubricate with silicone grease. Otherwise, install a new bypass.
• Exercise regularly: Once repaired, operate the bypass a few times per year to prevent seizing.

Warning: A cracked bypass can fail suddenly and flood the area; replace at the first sign of structural damage.