Salt-free scale control
Salt-free scale control for Treasure Valley homes
A salt-free system helps keep hard water scale from building up in your pipes, water heater and fixtures. It needs no salt, no drain and no electricity. It also leaves the hardness minerals in your water, so it's worth knowing exactly what you're getting before you choose one.
- Best for
- Moderate hardness, homes without a drain
- Needs
- No salt, drain or power
- Spotting
- Still happens
- Installed by
- Licensed journeyman plumbers
How salt-free scale control works
Water flows through a tank of special media. The most common type is called template-assisted crystallization. It gives calcium and magnesium a surface to form on, and they come away as microscopic crystals that stay suspended in the water.
Those crystals are much less likely to stick to pipe walls and heating elements, so new scale builds up more slowly. Another type feeds a tiny, controlled amount of food-grade phosphate that coats surfaces and slows scale in a similar way.
Nothing is traded out and nothing goes down a drain. The calcium and magnesium are still in your water when it reaches the tap.
What salt-free does and does not do
We'd rather you know this now than find out after the install.
What it does
- Slows new scale in pipes, the water heater and fixtures
- Runs with no salt, drain line or electricity
- Keeps the minerals in your water, which some people prefer for taste
- Needs little upkeep beyond annual service and a media change every few years
What it does not do
- Remove calcium and magnesium. Your water will still test hard.
- Stop spots on dishes, glass and shower doors when water dries
- Give you the easy lather and slick rinse of soft water
- Treat iron, sulfur smell or chlorine taste. Those need their own treatment.
If spot-free glass is the goal
Spots are the minerals left behind when water dries. A salt-free system leaves those minerals in the water, so the spots stay. If clean shower glass and dishes matter most to you, a water softener is the system that fixes it.
Who salt-free fits
Homes with no drain, or rules against salt
Some HOA or building rules limit brine discharge, and some homes have no good spot for a drain line. Salt-free needs neither.
Low-sodium households
No salt is used, so no sodium is added to your water.
Moderate hardness
Salt-free works best on moderately hard water. At very high hardness, a softener usually does the job better. Your test tells us which side you're on.
Scale protection first
If you mainly want to protect the water heater and fixtures and can live with some spotting, salt-free is a simple, low-upkeep choice.
Water softener and salt-free, side by side
| Water softener | Salt-free scale control | |
|---|---|---|
| Hardness minerals | Removed | Stay in the water |
| Spots on dishes and glass | Greatly reduced | Still happen |
| New scale build-up | Greatly reduced | Reduced |
| Soap and lather | Lathers easily | Same as hard water |
| Salt or potassium | Yes, added every 4 to 6 months for most homes | None |
| Drain line | Needed for regeneration | Not needed |
| Electricity | Standard outlet for the valve | None |
| Added sodium | Small amount (potassium is an option) | None |
| Routine maintenance | Monthly salt check, annual service | Annual service, media replaced every few years |
Iron, sulfur and chlorine need their own treatment with either option. Your water test shows whether you need anything else.
Before you choose salt-free
Salt-free media doesn't handle iron or manganese well. On a well with iron, we treat that first so the media lasts.
City chlorine won't hurt most salt-free media, but it won't take the chlorine out either. If the taste or smell bothers you, pair it with whole-home filtration.
Your test tells us whether your hardness is in the range where salt-free makes sense. If it isn't, we'll tell you so.
Salt-free questions
Is a salt-free system a water softener?
No. A softener removes hardness minerals. A salt-free system leaves them in the water and changes how they behave so they're less likely to form scale. Your water will still test hard.
Will it remove the scale I already have?
Plan on it slowing new scale. Existing build-up on fixtures and in the water heater may still need cleaning, and flushing the water heater once a year is still a good habit.
How long does the media last?
Usually a few years, depending on how much water you use and what's in it. We'll give you the replacement schedule for your system at install.
Can it go on my softener loop?
Yes. A softener loop is a natural spot for it. Salt-free doesn't need the drain or outlet that's usually there, but the loop gives us a clean place to tie in.
See if salt-free fits your water
A free water test shows your hardness and anything else that affects the choice. You'll get a straight answer and a written quote, with no pressure.