A softener's brine tank holds salt and water. A float and a fill valve control how much water enters the tank during each refill. When the float sticks or the valve does not close, water keeps flowing in. It can rise above the salt platform, saturate the salt, and in the worst cases run out of the tank and onto the floor. The damage often builds slowly, so the early signs are easy to miss if you are not looking for them.
The early signs
The first sign is usually the salt. If the salt at the bottom of the tank is soft, slushy, or sitting in standing water, the level is higher than it should be. Other signs include a constant gurgling or running sound after a regeneration, a brine tank that seems fuller than it was when you last checked, a damp floor or salt residue around the base, and a unit that regenerates more often than its settings say it should. If you notice water running from the drain line when the unit is not in its regeneration cycle, stop and call for service.
Checks an owner can safely make
Start with the unit at rest, not in the middle of a regeneration. Open the brine tank lid and look at the water level in relation to the salt. Note whether water covers the bottom of the salt or sits above the salt platform. Check the salt for mush or crusting, and record the level so you can compare it on the next visit. If the manual describes how to view or gently lift the float, follow those steps exactly. Do not force the float, and do not take apart the valve or the brine assembly unless the manual says the owner may do so.
What is not an owner job
Removing the fill valve, cleaning the brine valve, or adjusting the internal control settings is usually a technician task. Those parts are under pressure, and a mistake can cause a leak or a larger overflow. If the float is clearly stuck or the water level stays high after you have checked the basics, shut off the water supply to the unit according to the manual and call a qualified provider.
Ask the provider these questions
- Does the service call include a check of the float, the fill valve, and the brine valve, or only the control head?
- What is covered under the warranty for the float and fill valve, and what is treated as a consumable?
- How will the technician confirm that the brine tank level is correct after the repair?
- What should I record or photograph before the visit so the technician can see the problem?
Finding a qualified technician who will answer these questions clearly is part of the job. The directory of water treatment providers lists providers you can compare, and it is worth asking each one the same set of questions before you book a visit.