E15 error, low or no water pressure to the home when softener is in service

Safety: Place the unit in bypass to restore normal pressure temporarily. Depressurize before opening the tank or valve.

• 1. Confirm softener is cause: With the RainSoft bypass in Bypass, check if house pressure returns to normal. If yes, the restriction is inside the softener.
• 2. Inspect internal screens: Remove the control valve from the resin tank (follow manual). Check the bottom distributor screen and top basket for iron sludge or resin fines. Clean or replace as needed.
• 3. Check riser tube: Ensure the riser tube is straight, not cracked, and properly seated in the valve and bottom distributor.
• 4. Evaluate resin condition: If resin is heavily fouled with iron or appears mushy, it may be restricting flow and should be replaced.

Resolution: After cleaning or replacing components, reassemble and test flow. Persistent E15 may require a full resin rebed and distributor replacement.