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InsightHorizon Digest

How does a salt chlorine generator work

Author

Isabella Harris

Updated on April 02, 2026

Salt chlorine generators convert sodium chloride (NaCl), also known as table salt, into chlorine. These salt generators, also called salt cells, work by electrolysis. The salt water is electrically charged, which splits the salt molecules and generates chlorine (Cl).

How does a chlorine salt generator work?

Salt chlorine generators convert sodium chloride (NaCl), also known as table salt, into chlorine. These salt generators, also called salt cells, work by electrolysis. The salt water is electrically charged, which splits the salt molecules and generates chlorine (Cl).

Why is my salt generator not producing chlorine?

Salinity. Chlorine generators need salt to produce chlorine and can’t do so if the amount of salt in the water is too low. The desired salinity level in a saltwater pool is between 2,500 and 3,500 ppm. … If your salinity is below 2,500 ppm, the generator will not be able to produce chlorine.

How long do salt chlorine generators last?

A well-maintained salt chlorine generator will last 3-7 years. Replacing the salt cell costs $700-$1100. Replacing the control board costs $500-$900. You can extend the lifespans by maintaining a consistent salt level, cleaning the cell only when needed, and using the reverse polarity function.

What should my salt chlorinator be set at?

We suggest you start your salt chlorine generator at 50 percent output and run it for a couple of days, then check the chlorine level. In a balanced pool, a good chlorine level is 1-3 parts per million. If your chlorine levels are low, you can raise the percentage, and if it’s high you can lower the percentage.

Does chlorine generator consume salt?

The chlorine generator (also known as salt cell, salt generator, salt chlorinator, or SWG) uses electrolysis in the presence of dissolved salt to produce chlorine gas or its dissolved forms, hypochlorous acid and sodium hypochlorite, which are already commonly used as sanitizing agents in pools.

How do I know if my salt generator is working?

The easiest way to ascertain if the chlorinator is working is to make sure the cell is clean by checking the needle or production lights. Ensure there is enough salt in the pool. On the chlorinator box there should be a light or dial that indicates it is working.

What happens if you have too much salt in your pool?

Having too much salt in your pool water can result in unnecessarily increasing chemical expenses. But having too little salinity restricts the amount of chlorine being generated and can lead to algae and bacteria growth.

How often do you have to add salt to a saltwater pool?

Annual booster additions of pool salt are usually required, but only to replace salt lost from backwashing, splashout or lowering the water for winter. If you fully drain the pool for maintenance, you will need to replace all of the pool salt. Over a ten-year timespan, the cost of a salt water pool vs.

How do I know if my chlorinator is working?

The easiest way to be certain if the chlorinator is working is to make sure the cell is clean by checking the needle or production lights on the chlorinator box. When operating, you should also see bubbles (hypochlorite gas) inside the chamber, producing what looks like cloudy water – that’s chlorine being created!

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Do I need to add chlorine to my saltwater pool?

Yes, a salt water pool has a reduced cost of operation as compared to a traditional chlorinated pool. This cost savings is primarily because chlorine is generated from salt and there is no need to buy chlorine. Additionally, salt water pools require fewer chemicals to keep the water clean and clear.

How do I know if my Pentair salt cell is bad?

  1. The power center displays a Check Salt message. …
  2. The Cell Warning light displays consistently, shutting off for only a short while after cleaning.
  3. Voltage is higher than normal.
  4. Amperage is irregular (it should normally be zero or just slightly above)

How many hours a day should a salt water pool pump run?

The average pool system needs to run anywhere between 4-10 hours so you will have to gauge it yourself though testing over time.

What should my chlorinator read?

On a Hayward Salt Chlorinator, your salt reading should be between 2,700 – 3,400 PPM (parts per million) with the optimum level of 3,200 PPM.

What setting should my salt generator be on?

Try to maintain a consistent salt level of between 2,700 parts per million (ppm) and 3,400 ppm, with 3,200 ppm being ideal.

Why are my chlorine tablets not dissolving?

If the tablets are not dissolving, and you get a strong smell of chlorine when you open the chlorinator, you probably have a bad check valve in the chlorinator. It is not allowing any water to move through the chlorinator, and any water that is there simply sits there and builds up a yellowish chlorine gas.

Should I remove salt cell for winter?

It’s best to remove the salt cell for winter. Start by turning off all circuits to pool equipment, including the pool pump. Unscrew the unions to disconnect the generator cell from the pool lines. You can replace it with a temporary “dummy” cell to keep the line properly spaced and sealed through the winter.

How often should I clean my salt cell?

How often should my salt cell be cleaned? Clean salt cells when scale develops on the metallic (titanium) grids, or once per season at the very least. Too frequent cleaning will erode the coating on the grids, which is what makes them work.

Can you taste salt in a saltwater pool?

Saltwater pools do not generally taste salty. To compare, the salt in seawater is concentrated to about 35,000 parts PPM (parts per million). Saltwater pools’ salinity is about 3,000 PPM. So, the salt—and the taste of salt—in saltwater pools is about 10 times less than that of seawater.

Should you shock a salt pool?

Should you add shock to a salt water pool? It’s absolutely okay to shock your salt water pool, and is actually pretty important! … Running your pool’s super-chlorinate feature too often is hard on the motor and will cause it to wear out faster.

Does your body absorb the salt in salt water pools?

Human skin absorbs sodium, salt, and chlorine from a saltwater pool. Providers have linked numerous health concerns to sodium being absorbed through the skin. Providers have also linked higher heart mortality risks to sodium absorption through the skin, particularly among people with: High blood pressure.

Why is my salt water pool cloudy?

Just like a chlorine-based pool, saltwater pools turn cloudy when chemicals are not balanced. You need to ensure that all chemicals are balanced all the time to avoid cloudy water and growth of algae. The major causes of cloudiness are chlorine, pH, Salinity, total alkalinity, cyanuric acid, and calcium hardness.

What are the advantages and disadvantages of a saltwater pool?

  • PRO: Saltwater pool is softer on your eyes and skin.
  • CON: A saltwater pool is more expensive than a chlorine pool.
  • PRO: They usually require less maintenance than chlorine pools.
  • CON: Saltwater pools require expert technicians for repairs.

Why does my chlorinator says no flow?

The most common reason for low or no flow is that the baskets are full of debris. … *Always turn the pump off before you remove the baskets, if your pool pump is below water level you will need to close the valves in front of the pump and set the multiport valve on the filter to ‘closed’.

How long does a chlorinator cell last?

This is all possible thanks to your pool’s salt chlorine generator cell. With proper care, a cell will last about five years. Eventually, though, it will need to be replaced. The trick is, it’s not always easy to know when it’s time.

How does an automatic chlorinator work?

An automatic pool chlorinator plugs directly into your pump and filter system and sanitizes the water returning to the pool. Rather than placing the chlorine directly in the pool in a floating chlorinator, for example, an automatic chlorinator dispenses chlorine steadily from outside the pool.

Do salt water pools get algae?

If you own a salt water pool, you probably know how big of a problem algae growth can be. Once these organisms contaminate the pool, they can grow and spread quickly. Both chlorinated and salt water pools need proper water chemistry levels in order to prevent algae growth.

How long after adding salt to pool Can you swim?

It’s recommended to wait at least 20 minutes to swim after adding salt to your pool. If you’re adding calcium chloride to your pool water, it’s recommended to wait two to four hours before swimming again.

Is a salt water pool better than chlorine?

Lower chlorine levels make saltwater pools gentler on skin and eyes. … Chlorine levels in saltwater pools are enough to disinfect, but not enough to fade expensive swimwear and gear. Because of the natural chlorine, saltwater pools require fewer chemicals (and less attention) compared to chlorinated pools.

What voltage does a chlorinator use?

The power pack must deliver enough voltage and current to make enough chlorine to do the job. Most units use between 6.2 Volts dc and 9.2 Volts ac and operate between 10 and 30 Amps.

How much is a salt water chlorinator?

National Average Cost$36,400Maximum Cost$197,000Average Range$29,000 to $57,000