Water Softener Maintenance
Water softener maintenance is mostly keeping salt in the brine tank and testing your water now and then. A few times a year, break up salt crust, clean the resin on iron-rich water and check the valve settings. If you're choosing a new unit instead, our best water softener list favours models with easy-to-find parts.
Monthly: salt
Keep the salt a few inches above the water line and below the top of the brine well. Use clean pellets (see water softener salt); rock salt leaves insoluble sludge. If the level hasn't dropped in weeks but you're using water, suspect a salt bridge.
Every few months: test and check settings
Test a cold tap with strips. Softened water should read close to zero. Check that the valve clock is right (regenerations should happen at night) and that the hardness setting still matches your water; utilities change sources. On wells with iron, add resin cleaner on the maker's schedule.
A simple maintenance calendar
| When | Job | Time |
|---|---|---|
| Monthly | Check and top up salt; look for a crust | 5 minutes |
| Every 3–4 months | Test softened water; add resin cleaner on iron water | 10 minutes |
| Every 6–12 months | Change any sediment pre-filter cartridge | 15 minutes |
| Yearly | Clean the brine tank; check the venturi and float | 1 hour |
| After a power cut | Reset the clock so regeneration stays overnight | 2 minutes |
| Every 10–15 years | Replace resin (two-tank systems) | Half a day or a pro visit |
Yearly: clean the brine tank
Let the salt run low, scoop out any sludge, rinse the tank and the brine well, check the float, then refill. Clean or replace the venturi screen (a small nozzle-and-screen part in the valve) if regeneration has been weak.
Common water softener repair jobs you can do yourself
Salt bridge
A hard crust forms above the water, so salt stops dissolving. Break it gently with a broom handle and scoop out the chunks. Humidity and overfilling cause it.
Water is hard again
Check in order: salt level, bypass valve position, clock and hardness setting, then the venturi and brine line for blockages. Run a manual regeneration and retest.
Brine tank full of water
Usually a blocked drain line, a plugged venturi or a stuck float. Clear the drain line kink first; it's the most common cause.
Low water pressure
A clogged pre-filter or fouled resin. Change the cartridge; if pressure stays low, the resin may need cleaning or replacing.
Constant regeneration or running to drain
Often worn piston seals or spacers in the valve. Fleck-valve systems use widely sold rebuild kits; cabinet units usually need the maker's part.
Signs your resin is wearing out
Resin rarely fails overnight. Watch for softened water that tests hard sooner after each regeneration, a brine tank that empties faster than it used to, low pressure that a new pre-filter doesn't fix, or tiny amber beads in faucet aerators (a sign the bottom screen has cracked). Chlorinated city water slowly breaks resin down, and iron coats it. A cleaner restores fouled resin; worn-out resin has to be replaced.
Water softener replacement: repair or replace?
Most softeners are worth repairing for their first 10–15 years. Replace the water softener instead when:
- the resin or mineral tank leaks or has cracked;
- a cabinet unit's control board fails after the warranty and the part costs close to a new softener;
- parts for the valve are no longer sold;
- your household or hardness has grown and the softener now regenerates every day or two;
- it's an old timer model and a metered valve would cut salt and water use noticeably.
A water softener replacement is usually simpler than a first install: the loop, drain and outlet are already there, so a like-for-like swap is a couple of hours. Check the new unit's inlet and outlet size and height against the old one, and re-test your hardness before you size it. Two-tank systems can often be saved with a new valve or a resin rebed instead. Our best water softener rankings and the cost guide help with the new unit.
Holidays and power cuts
Before a long trip, there's nothing to do on a metered softener: no water used means no regeneration. Timer models keep regenerating, so put them in bypass. After a power cut, check the clock; many valves keep settings but lose the time, which moves regeneration into the day.
When to call a pro
Leaks at tank threads, cracked valve bodies, control board failures and resin replacement on cabinet units are jobs for a dealer or plumber. Resin usually lasts 10–15 years on city water and less with chlorine or iron. A two-tank softener can be rebedded with replacement resin for far less than a new system; if yours is beyond saving, start with our buying guide or the well water softener picks.