Typical Problems - Causes and Cures

1.) Low pH
The pH must be maintained between 7.0 and 8.0. This is extremely important. Failure to meet these conditions will result in tank corrosion. Corrosion can also occur if water containing iron drips onto the exterior of the tank or otherwise comes into contact with the heat exchanger.

2.) Oxidizer Damage
Chlorine feeders must be installed downstream of the HEAT SWAPPER™ so that concentrated chemicals cannot flow into the heat exchanger when the filter/pump is not operating. For further protection, install the chlorinator or brominator slightly lower than the HEAT SWAPPER™. Storing strong oxidizers (chlorine or bromine) in a poorly ventilated room with the heat exchanger will corrode the exterior of the stainless steel tank.

3.) Electrolysis
Use dielectric unions to avoid corrosion damage from electrolysis. Electrolysis can be caused by metals other than stainless steel being attached to the heat exchanger. Use dielectric unions to isolate dissimilar metals from the stainless steel tank. We do not recommend the Heat Swapper for heating salt water pools. Salt raises the conductivity of water which can make metals in contact with it more susceptible to electrolysis.

4.) Stray Electrical Currents
Stray electrical currents can come from many sources, a salt chlorine generator would be one example. To protect against stray electrical currents, use dielectric unions (see price sheet) on the 3/4" tube circuit connections. Use PVC pipe or similar non-metal pipe to isolate the 11/2" connections from metal to metal contact. We do not recommend installation of a HEAT SWAPPER™ on a pool or spa with a salt chlorine generator system.