How do I clean a water softener brine tank?
Wait until the salt is low, put the softener in bypass and unplug it, then scoop out the old salt and any mushy sludge and bail out the brine. Scrub the tank with mild dish soap and water, rinse it, and add a few gallons of clean water and fresh pellet or nugget salt. Then sanitize and run a recharge the way your model's manual describes.
Free to ask. Local shops send quotes, and you pay only when you book one.
By Kasra Taheri, Founder, LoclisPublished
Researched and drafted with AI, then checked claim by claim against the sources listed below before it was published. Prices and rules change; the dates beside each source say when it was last checked.
Step by step
Read when to stop and call a pro, further down this page, before you start.
Step 1: Let the salt run low
Plan the cleaning for when the tank is nearly out of salt, so there is less to scoop out and throw away.
Step 2: Bypass and unplug
Put the bypass valve in the bypass position so the house still gets water, then unplug the softener's power supply so it cannot start a recharge while the tank is empty.[2]
Step 4: Scoop out the salt
Scoop the loose salt and any mushy or caked salt into a bucket, and bail or wet-vac the brine out until you can see the tank floor.
Step 5: Scrub and rinse
Scrub the inside of the tank and the outside of the brinewell with a soft brush, warm water and a little dish soap, then rinse until no suds are left.
Step 6: Add water and fresh salt
Pour about three gallons of clean water into the tank, then add nugget, pellet or coarse solar salt with less than 1% impurities.[1]
Cleaning a brine tank is an hour or two of scooping, scrubbing and rinsing, and it is one of the few softener jobs that needs no tools beyond a bucket, a brush and a broom handle. The idea is simple: get the old salt and sludge out, wash the tank, put fresh salt and a little water back, then sanitize and run a recharge so the softener starts clean.
What the brine tank does
A home softener has two parts. The tall resin tank does the softening, and the shorter salt tank beside it makes the brine that recharges the resin. Day-to-day upkeep, as Virginia Cooperative Extension describes it, is mostly adding salt pellets to the brine tank, which usually sits beside the softener tank.[3] Inside the salt tank is a narrow tube, the brinewell, where the softener draws brine and refills water.
The salt tank matters more than it looks. GE's manual says: "If the water softener uses all the salt before you refill it, you will experience hard water."[1] Sludge, a crust of salt, or a tank full of dirt from cheap salt does the same thing even when the tank looks full.
Why brine tanks get dirty
Most of the mess comes from the salt. GE's manual says to "Use clean water softening salts only, at least 99.5% pure," and warns against "rock, block, granulated or ice cream making salts," which "may contain dirt and sediments that might mush or cake."[1] That residue settles on the tank floor and around the brinewell.
The other common problem is a salt bridge: a hard crust that forms across the tank with an empty space under it, so the salt never touches the water. GE and Whirlpool both say a bridge is "usually caused by high humidity or the wrong kind of salt."[1][2]
Before you start
Pick a day when the salt is low. You will be throwing away whatever is left, and a nearly empty tank is far lighter to work in.
Have ready a bucket or two, a scoop or old saucepan, a soft brush, dish soap, a wet/dry vacuum if you have one, a broom handle, fresh salt and household bleach. Salt bags are heavy; GE's own instruction is to "Use two or more people to move and lift salt bags."[1]
Put the bypass valve in the bypass position so the house still gets water while the softener is out of service, then unplug the softener's power supply.[2][1] The bypass valve is usually a push-pull stem or a lever where the pipes meet the control valve; your manual shows which position is which.
Breaking a salt bridge first
If there is still salt in the tank, check for a bridge before you scoop. Push a broom handle straight down through the salt. If it hits something hard before it reaches the bottom, that is most likely a bridge. Break it by pushing gently in several places. Whirlpool's manual warns: "Do not use any sharp or pointed objects as you may puncture the brine tank."[2] GE adds "Do not pound on the walls of the tank," and to help dissolve what is left, suggests you "pour one gallon of warm water (not hot) into the tank."[1]
Cleaning, refilling and sanitizing
Once the salt and brine are out, the cleaning is ordinary housework. Scrub the walls and floor with warm, mildly soapy water, wipe the outside of the brinewell, and rinse until the water runs clear with no suds. Look into the brinewell for salt chunks or debris around the float and the bottom of the tube, and lift them out.
Refill the way your manual describes for a new installation. GE and Whirlpool both say to "add about three gallons of clean water into the salt storage tank," then fill with nugget, pellet or coarse solar salt with less than 1% impurities.[1][2]
Then sanitize, using the amounts in your own model's manual. GE and Whirlpool both say to remove the brinewell cover, pour about 3 oz. (6 tablespoons) of household bleach into the brinewell, put the cover back, set the bypass valve to service and start a recharge.[1][2] After it finishes, fully open a cold water faucet downstream from the softener and let 50 gallons of water pass through, which should take at least 20 minutes.[1][2] Check the fittings while it runs, and recheck for leaks 24 hours after the first recharge.[1][2]
Unplugging for an hour or two usually costs you nothing. GE's control will "keep all settings for up to 24 hours" without power;[1] reset the clock if it is flashing, and reset the salt-level setting if your model has one.
Do not mix cleaners with the salt
If you also use a resin or iron cleaner, follow its label and your softener's manual. GE says "Do not pour the resin bed cleaner in with the salt," because it is less effective there and "can cause damage to the softener if it is left in the brine tank for an extended period due to the corrosive gases that are formed."[1] GE's instruction is to mix it with water, pour it into the brinewell and recharge right away. If the water is still hard afterwards, work through why a softener stops softening.
Stop and call a pro if
- The tank or brinewell is cracked, or water is on the floor around the softener.
- The brine level stays high after a clean tank and a recharge. That points to the float, the nozzle and venturi, or the drain line, and is a repair for someone who services softeners.
- The softener has to be moved, re-plumbed or given a new drain. Work on the supply piping is plumbing, and the Virginia Uniform Statewide Building Code requires a permit for installations or alterations involving the water supply and distribution system.[4]
- Water is brown, salty or cloudy for days after the flush.
Getting help in Virginia
Loclis lists DPOR-licensed plumbing businesses with their licence number and class. Look up plumbers in Blacksburg, browse water softener services, or read more plumbing answers, including how often to add salt.
If the tank is clean and the water is still hard, describe the problem once and licensed local businesses quote it.
Common questions
- How often should a brine tank be cleaned?
- Clean it when it shows it needs it: sludge or dirt on the bottom, a salt bridge that keeps coming back, or a brine level that stays high. Looking into the tank each time you add salt is an easy way to catch these early. High-purity pellet or nugget salt usually leaves less residue, so cleanings come less often.
- Can I use bleach to clean a brine tank?
- Only the small, measured amount your model's manual gives for sanitizing. GE's and Whirlpool's manuals both call for about 3 oz. (6 tablespoons) of household bleach poured into the brinewell, followed by a recharge and a flush of 50 gallons through a cold faucet. A resin or iron cleaner is a separate job with its own instructions: GE says to mix it with water, pour it into the brinewell and recharge right away, not to leave it in with the salt.
- What is the mushy layer at the bottom of my brine tank?
- Usually salt that has turned to sludge, or dirt and insoluble material left behind by lower-grade salt. GE warns that rock, block and granulated salts "may contain dirt and sediments that might mush or cake." Scoop it out, clean the tank, and switch to nugget, pellet or coarse solar salt.
- Do I need to reprogram the softener after unplugging it?
- Usually not for a short cleaning. GE's softener keeps its settings for up to 24 hours without power. If the clock is flashing when you plug it back in, reset the time of day, and reset the salt-level setting after you add salt if your model tracks it.
- Should I clean the resin tank at the same time?
- The resin is cleaned by the brine during every recharge. If you have iron in your water, a resin cleaner made for softeners helps, but follow the manual: GE says to mix it with water, pour it into the brinewell and start a recharge right away, not to leave it sitting in the salt.
Sources
- [1] Water Softening System Owner's Manual and Installation Instructions, GXSH40V and GXSH45V (49-6000299), GE Appliances. Checked October 26, 2026.
- [2] Installation and Operation Manual: Demand Controlled Water Softener, Models WHES20 and WHES30, Ecodyne Water Systems (Whirlpool water softeners). Checked October 26, 2026.
- [3] Virginia Household Water Quality Program: Household Water Treatment (442-670), Virginia Cooperative Extension, Virginia Tech. Checked October 26, 2026.
- [4] 13VAC5-63-80, Virginia Uniform Statewide Building Code: Section 108 Application for permit, Virginia Administrative Code, Legislative Information System. Checked October 26, 2026.
Want a pro to handle it?
Describe the job once. Licensed local businesses send quotes, and you pay only when you book one.
Get a quote for Plumbing Repair