First put the softener on bypass and unplug it. Then find the source: the drain line, the brine tank overflow, the valve head, a hose or fitting, or a cracked tank. Most leaks come from a kinked or blocked drain line, a stuck brine float or a loose connection.
If water is coming from the tank body, a cracked valve or near an outlet, leave it unplugged and call a plumber.
Stop the water and make it safe
A softener sits in the water line, so the leak is under household pressure. Turn the bypass valve to bypass, which stops water flowing through the unit while keeping water in the house. If you have no bypass, close the main supply valve.
Unplug the unit if you can reach the plug without standing in water. If the floor is wet near an outlet, do not step in. Turn off the circuit at the panel instead, or wait for help.
Where the leak is and what it usually means
Match what you see to the likely cause.
| Where the water appears | Likely cause | Can you handle it |
|---|---|---|
| At the drain hose end or floor beneath it. | Kinked, loose or blocked drain line. | Often yes. |
| Water or salty overflow from the brine tank. | Stuck float, clogged injector, too much water in the tank. | Sometimes, a plumber for the valve. |
| At the hoses or fittings to the inlet and outlet. | Loose clamp or worn connector. | Often yes, if you can shut off the water. |
| From the valve head. | Failed seals or a cracked head. | Usually a plumber. |
| From the tank body. | Cracked or corroded tank. | No, it needs replacing. |
The drain line: first place to look
The softener sends rinse water out through a small hose.
- Follow the hose from the valve to its end. It should run to a laundry tub, a standpipe or a floor drain.
- Check for kinks and loose clamps. A kink makes water back up and spray.
- Look for an air gap. The hose end should sit above the drain, not pushed in, so dirty water cannot be drawn back.
- Check the drain itself. A slow laundry standpipe or floor drain overflows when the softener regenerates.
The drain should go to the sanitary side, such as a laundry tub or floor drain, and follow the manual. Do not route it to a sump pit or a storm drain.
The brine tank: salt, water and overflow
The brine tank holds salt and a pool of water. It should not fill past a set level. If the float sticks, or the injector is clogged, the tank overfills and water spills out the overflow fitting or the lid.
Look for a salt bridge, a hard crust that sits over empty water. It stops the brine draw and can cause odd refills. Break it up gently with a broom handle, never a sharp tool.
Things you can check yourself
These are safe if the unit is on bypass and unplugged.
- Tighten hose clamps by hand or with a screwdriver. Do not overtighten plastic fittings.
- Look at the drain hose. Replace a cracked or hardened hose.
- Check the salt level and the bridge. Remove old salt if mushy.
- Check that the unit is level. A tilted brine tank can overflow.
- Take a photo of the valve settings and the leak. It helps whoever repairs it.