Video demo

Water, salt, electricity… and just a few simple steps

A WATA™ device is a simple tool to produce sodium hypochlorite (equivalent to 6 g/l of active chlorine) using just water, salt and electricity. You immerse the WATA™ device in a saltwater solution (25 grams per litre) and connect it to an appropriate source of electricity. This produces electrolysis. The electrolysis converts the dissolved salt (sodium chloride) into active chlorine (sodium hypochlorite). ‘Electrolysis’ is the process of dissolving or chemically decomposing a substance by passing an electric current through it. In this case, electrolysis breaks down the water and salt, which produces chlorine. The WATA™ device simply uses a well-known technique that has been used for chlorine production for almost 200 years. It is the design of the WATA™ that makes it a very special device. The WATA™ is simple and safe to handle. It works with low (or large, if you prefer) quantities of water and salt and requires simple containers to hold the liquids.


The water you use for the electrolysis must be clear. The water that you treat with the active chlorine concentrate must also be clear. The chlorination of cloudy or muddy water cannot be guaranteed. If the water is turbid, it must be filtered or the sediments must first be allowed to settle or flocculate.


The conductivity of the salt solution increases with salt concentration, which affects the passage of electricity in the solution. The active chlorine production efficiency of WATA™ devices can only be guaranteed if the initial salt concentration in the water is precisely 25 g/l. The smaller the volume of water to be electrolyzed, the greater the risk of overdosing or underdosing the salt, because of the precision required to measure the quantity. If you do not have access to quality salt or you cannot make sure that you are dissolving exactly 25 g/l, we strongly recommend that you use saturated brine to prepare your salt solution.

  • Wata™
  • 2018/12/14