A saltwater chlorinator

A saltwater chlorinator, also known as a salt chlorinator or saltwater generator, is a device used to chlorinate swimming pools and spa water using salt.

Instead of using traditional chlorine tablets or liquid chlorine, a saltwater chlorinator uses an electrolysis process to convert salt into chlorine.

Here's how it typically works:

1. Salt is added to the pool water: The first step is to add salt to the pool water. The salt is dissolved, and the concentration is usually around 2,500 to 4,000 parts per million (ppm), which is much lower than seawater.

2. Electrolysis cell generates chlorine: The saltwater chlorinator is connected to the pool's circulation system. As the pool water passes through the chlorinator's electrolysis cell, an electric current is applied to the cell's electrodes, which are typically coated with a thin layer of a special metal alloy. This process, known as electrolysis, causes the salt in the water to split into its component parts: sodium and chlorine.

3. Chlorine sanitizes the water: The chlorine generated by the electrolysis process acts as a sanitizer, killing bacteria, algae, and other microorganisms in the pool water. It performs the same function as traditional chlorine but without the need for manual dosing.

4. Chlorine reverts back to salt: After the chlorine has done its job, it reverts back to salt through a process called reversion or oxidation. This means that the chlorine levels in a saltwater pool tend to be more stable and less harsh than those in a traditionally chlorinated pool. (hayward pool pump)

5. Maintaining salt levels: As the chlorine is being produced and used up, the salt concentration in the pool water gradually decreases. It's important to regularly monitor and maintain the salt level by adding more salt as needed to ensure the chlorinator can continue generating chlorine effectively.

Benefits of saltwater chlorinators include reduced reliance on traditional chlorine products, which can be more convenient and cost-effective in the long run. Saltwater pools are also generally considered to be more gentle on the skin and eyes compared to traditionally chlorinated pools.

However, it's important to note that saltwater chlorinators require regular maintenance and monitoring to ensure proper functioning. The electrolysis cell may need periodic cleaning or replacement, and the pH and alkalinity levels of the pool water still need to be balanced and monitored regularly.