What's on a water softener maintenance checklist?
Updated August 2026
A water softener mostly wants salt kept at least a third of the way up the brine tank, a monthly poke to break up salt bridges, and a yearly brine-tank cleaning with a venturi check. The salt is cheap, roughly one 40-pound bag a month for a typical family, and the routine is quick. Do it and the unit lasts 10 to 15 years with a resin bed good for 10 to 20; ignore it and hard water quietly starts scaling the water heater and fixtures all over again.
| Task | Interval | Effort |
|---|---|---|
| Check the salt and refill to keep it a third to half full | Monthly | 5 min · DIY |
| Break up any salt bridge or crust with a broom handle | Monthly | 5 min · DIY |
| Confirm softening with a hardness test strip | Monthly | 5 min · DIY |
| Task | Interval | Effort |
|---|---|---|
| Empty and scrub the brine tank | Yearly | 45 min · DIY |
| Clean the venturi and nozzle assembly | Yearly | 20 min · DIY |
| Sanitize the resin bed | Yearly | 20 min · DIY |
| Task | Interval | Effort |
|---|---|---|
| Add a resin cleaner to the brine well | As needed | $15–25 |
| Task | Interval | Effort |
|---|---|---|
| Replace the resin bed when softening fades | 10–20 years | $200–400 |
| Plan for a new unit near end of life | 10–15 years | $800–2,500 |
What neglect costs
Let the salt run out and hard water flows straight through untreated, redepositing scale in the water heater, faucets, and appliance valves you bought the softener to protect. Worse is the salt bridge: a hard crust forms over an air gap so the tank looks full while no brine is being made, and you get hard water for weeks without noticing. Iron-bearing water fouls the resin if you never clean it. The whole failure mode is invisible until the scale and spotting come back, which is why the monthly glance matters.
Leave these to a pro
Most softener care is DIY, but a couple of jobs lean pro. A worn valve head or control that regenerates at the wrong time is a rebuild a plumber or dealer handles, and swapping a spent resin bed runs about $150 to $300 in labor plus $200 to $400 for the resin. If your water carries heavy iron or sulfur, a water-treatment specialist can add pre-treatment so the softener stops clogging. Otherwise, salt and a broom handle cover the routine.
This whole checklist ships as reminders in OnOtto: every task above, on the right schedule for your home, snooze-proof.
Load this checklist as remindersFrequently asked questions
What kind of salt should you use in a water softener?
Evaporated salt pellets are the cleanest choice and leave the least residue in the tank, which means fewer bridges and less mushing. Solar crystals are cheaper but dirtier. Rock salt is cheapest and worst, with impurities that gum up the valve. Potassium chloride is an option if you are on a sodium-restricted diet or discharge to a sensitive septic field, though it costs more. Whatever you pick, stick with one type rather than mixing.
What is a salt bridge and how do you break it?
A salt bridge is a hard crust that forms partway down the brine tank, leaving an empty gap beneath it. The tank looks full, but the salt never touches the water, so no brine forms and the softener quietly stops softening. Break it by pushing a broom handle straight down to crack the crust and let the salt fall. Checking for one every month is the single most useful softener habit.
How long does the resin last, and can you replace just it?
A resin bed typically lasts 10 to 20 years, often outliving the valve and controls, though iron, chlorine, and constant hard water shorten it. When soft water fades even with salt and a clean tank, spent resin is usually why. You can replace just the resin rather than the whole unit, but weigh it against the softener's age; past its 10 to 15-year life, a full replacement often makes more sense.