The Basic Maintenance Tasks You Need to Do

A water softener needs three things to keep working: salt in the brine tank, a clean resin bed, and occasional checks on the control valve. Most of the time, you are just refilling salt and letting the machine run its own cleaning cycles. If you do these three things, your softener will last 10 to 15 years without major repairs.

The work is not hard and does not require special tools. You can do it yourself in 15 minutes a month, or you can pay a service company $100 to $200 per year to do it for you. Either way, the cost is far less than replacing the unit early because you skipped maintenance.

Key Takeaways

  • Refill the brine tank with water softener salt every one to three months, depending on how much water your household uses.
  • Check the salt level by opening the tank lid and looking inside—you should see salt crystals, not just brine water at the bottom.
  • Run a manual regeneration cycle once a year to clean the resin bed and flush out trapped sediment and iron buildup.
  • Test your water hardness every six months with an inexpensive test strip to confirm the softener is still working.
  • Have a professional inspect the unit every two to three years to check the control valve, brine line, and resin condition.

Refilling Salt and Checking Brine Tank Levels

The brine tank is the smaller tank next to your softener (or sometimes built into the same cabinet). It holds the salt that the softener uses to clean the resin beads. You need to keep salt in this tank so the softener can regenerate—the process where it flushes out the minerals it has trapped.

Open the tank lid and look inside. You should see salt crystals piled up, not just liquid at the bottom. If you see only water or the salt level is below the halfway mark, it is time to refill. Buy bags of water softener salt at any hardware store, grocery store, or online. Do not use table salt or rock salt meant for driveways—they contain additives that will clog your softener.

Pour salt into the tank until it is about three-quarters full. The exact amount depends on your tank size, but a typical household uses one 40-pound bag every one to three months. If you are refilling more often than that, your water is very hard or you have a leak. If you are refilling less often, your household uses less water than average.

After you add salt, the tank may look like it has a hard crust on top. This is normal and happens when salt sits in humid air. You can break it up with a broom handle or just leave it—the softener will work through it during the next regeneration cycle.

Running a Manual Regeneration Cycle

Your softener regenerates automatically on a schedule set by the control valve—usually every three to seven days, depending on your water hardness and usage. During regeneration, the machine flushes salt brine through the resin bed to strip out trapped minerals, then rinses the resin clean. This happens at night or whenever you set it, and you will hear water running and draining.

Once a year, force a manual regeneration cycle to clean out sediment and iron buildup that the automatic cycles may miss. Look at your control valve—it is the box on top of the tank with buttons or a digital screen. Find the button or menu option labeled "Regenerate," "Manual Regen," or "Force Regen." Press it and let the cycle run to completion, which takes 30 minutes to two hours depending on your model.

Do this when you will be home and can hear the machine run. You may notice the water pressure drop slightly during regeneration, and you may see a small amount of salt water drain outside. This is normal. Do not run the softener or use hot water while regeneration is happening—wait until the cycle finishes and the tank refills.

Testing Water Hardness Every Six Months

The only way to know if your softener is actually working is to test the water. Buy a water hardness test strip at any hardware store for $5 to $10. These strips change color when you dip them in tap water, and you match the color to a chart to read the hardness in grains per gallon or parts per million.

Test your water every six months. Soft water should read 0 to 1 grain per gallon (or 0 to 17 parts per million). If your water reads higher than that, the softener is not working and you need to troubleshoot. Common reasons are low salt in the brine tank, a clogged brine line, or a broken control valve.

Write down the date and the reading each time you test. Over months and years, this log shows you whether the softener is losing power—a gradual rise in hardness means the resin bed may be wearing out and the unit may need replacement soon.

Cleaning the Brine Tank and Checking for Salt Bridges

Every two to three years, drain and clean the inside of the brine tank. Salt can leave behind sediment and buildup that blocks the brine line or clogs the control valve. Drain the tank by turning off the water supply to the softener, then opening the drain plug at the bottom of the tank (check your manual for the exact location). Let all the water and brine run out into a bucket or floor drain.

Once empty, look inside the tank. If you see a hard crust or a hollow space under the salt, you have a salt bridge—a dome of salt with air underneath. This stops the softener from drawing brine during regeneration. Break up the bridge with a broom handle or a long stick, or dissolve it by pouring warm water over it. Remove any sediment or debris from the bottom of the tank with a wet cloth.

Refill the tank with water (some models have a fill line marked inside) and add fresh salt. Turn the water supply back on and run a manual regeneration cycle to flush out any debris you loosened.

Inspecting the Brine Line and Control Valve

The brine line is a small plastic tube that carries salt water from the brine tank to the control valve during regeneration. Over time, it can crack, clog, or disconnect. Once a year, look at the brine line where it connects to the brine tank and where it enters the control valve. Make sure it is not cracked, kinked, or leaking.

If the brine line is cracked or leaking, you can replace it yourself—it costs $10 to $20 and takes 10 minutes. Turn off the water, unscrew the old line from both ends, and screw on a new one. Use a small wrench to tighten the connections so they do not leak, but do not over-tighten or you will crack the plastic fittings.

The control valve is the box on top of the tank. It has no moving parts you can service yourself, but you should check that it is not leaking water from the seams or the drain line. A small amount of water during regeneration is normal, but steady dripping means the valve seal is worn and the unit needs professional service.

When to Call a Professional

You can handle salt refills, manual regeneration, and basic cleaning yourself. Call a water softener service company if you see any of these signs: water that is still hard after the softener has been running, salt that does not go down over weeks, water leaking from the control valve or tank seams, or a foul smell coming from the brine tank.

A professional can test the resin bed, replace the control valve, unclog the brine line, or diagnose problems you cannot see. Service calls usually cost $150 to $300, and replacement parts range from $50 to $500 depending on what needs fixing. Many companies offer annual service plans for $100 to $200 per year that include inspections and minor repairs.

Frequently Asked Questions

How often should I add salt to my water softener?

Most households refill salt every one to three months. The exact timing depends on your water hardness, household size, and how much water you use. Check the brine tank monthly by opening the lid and looking inside. When the salt level drops below halfway, it is time to refill.

What happens if I run out of salt?

If the brine tank runs empty, the softener cannot regenerate and will stop removing minerals from your water. Your tap water will become hard again. Refill the salt as soon as you notice the level is low. If you have already run out, add salt and run a manual regeneration cycle to get the softener working again.

Can I use rock salt or table salt instead of water softener salt?

No. Rock salt and table salt contain additives and impurities that will clog the softener and damage the resin bed. Buy bags labeled "water softener salt" or "solar salt" at any hardware store. They cost about the same as other salts and are worth the difference.

How do I know if my water softener is broken?

Test your water with a hardness test strip. If the reading is higher than 1 grain per gallon after the softener has been running for a few days, something is wrong. Check the salt level first—low salt is the most common cause. If salt is full, the brine line may be clogged, the control valve may be stuck, or the resin bed may be worn out. Call a professional to diagnose.

Do I need to have my water softener serviced by a professional?

You can maintain a softener yourself with monthly salt refills and annual manual regeneration. However, a professional inspection every two to three years can catch problems early and extend the life of the unit. If you are not comfortable opening the tank or testing water, a service plan is worth the cost.