Air conditioning systems present another type of water problem. Condensation forms on cooling coils and drips into a pan before emptying into the drain. This results in algae growth which plugs the system at various points causing overflow of condensate. A clean properly maintained system does not experience nearly so many problems. A cup of household bleach flushed through the drain system 3-4 times per year will also help to prevent algae build-up in the drain.
