To ensure the Watermaid Unit functions and operates efficiently for many years to come, it is necessary to inspect and service the Watermaid Unit regularly. The list below shows the most common tasks required to ensure trouble free operation and adequate chlorine production from the Watermaid Unit.

1. Visually check your swimming pool. If it is Clean, Clear and Sparkling, it means there has been sufficient filtration and chlorination from the day before and that your water balance is usually OK. PH and Alkalinity should be checked on a weekly basis depending upon usage and weather conditions.

2. Look at the Watermaid Power Supply. If the GREEN LED indicators are at 50-100% you are in the Green and the unit is producing chlorine. This level can be adusted by pressing the + button to increase or the - button to decrease. Typically if the unit is at it's highest setting the LED will reach 100%. If not usually the pool's salt level is too low.

3. Check the salt level in the pool whenever LED indicator falls to a lower reading. This may happen if your area has experienced heavy rainfall or you have lost a large quantity of water from the pool by means other than evaporation and you have had to add water.

4. Clean the cell on a regular basis to ensure calcium deposits do not result in a loss of chlorine production from the unit. 

5) The cell can be easily cleaned by the following steps:
     a) Turn off the power to the pump and the Watermaid power supply.
     b) Unplug the brass plug from the top of the cell. (EZ Clean 300 Model)
     c) Unscrew the white fitting from the top of the cell.
     d) Slide the cell up and remove the cathode from the clear outer casing.
     e) Clean with hot water to remove calcium deposits. (Non-Abrasive)
     f) Slide the cathode back into casing, replace cap, plug-in the brass plug.
     g) Turn on Power to Pump and Watermaid Power Supply.

Note - If left unmaintained for extended periods of time calcium deposits 
may accumulate and can damage the cell's outer casing. If the cell has accumulated excess amounts of calcium, it may be necessary to clean the cell in a 1/10 solution of Muriatic Acid and Water. The cell can be removed from the base, turned upside down, placed in a bucket and filled with solution. 
Let unit soak until calcium has disolved and may be easily removed. 

These are the basic checks to perform when using the Watermaid Salt Chlorination System. With very little maintenance, The Watermaid Unit will provide you with many years of service.

Watermaid Chlorine Production
100% Available Chlorine

1.06 Ounces/Hour

25.38 Ounces/24 Hours

11.11 Pounds/7Days
Liquid Chlorine Equivalent
12.5% Available Chlorine

8.11 Ounces/Hour

1.52 US Gallons/24 Hours

10.65 US Gallons/7Days
Granular Chlorine Equivalent
65% Available Chlorine

1.62 Ounces/Hour

2.48 Pounds/24 Hours

17.08 Pounds/7Days
Watermaid Maximum Chlorine Production Table


    A commonly asked questions is, "How much chlorine is the Watermaid Unit capable of producing?" (1) Watermaid, Salt Chlorination Unit is capable of manufacturing up to 1 1/2 US Gallons of liquid chlorine equivalent (12.5% available chlorine) per day! (see production table below)That is up to double the chlorine production of most other brands. The chlorine production tables below show the chlorine production by ONE Watermaid, Salt Water Chlorinator.

          Complete WM40-EZY300 
              Watermaid Unit
         (Power Supply and Cell)

Please Note: Watermaid Pty Ltd manufactures one size unit to suit the majority of domestic home swimming pools. We do not manufacture units to suit different size pools. (as do some other manufacturers). It has been from our experience over the last 40 years that even some small pools have very high chlorine demands and units that are manufactured by other companies to suit smaller size pools simply cannot cope "when the going gets tough". The result is usually a green pool and a dissatisfied customer.

Salt Water Chlorinators for Swimming Pools and Spas