Electrochemical systems in the nature of electrostatic and electro-chlorination water treatment apparatus, electrochemical water treatment apparatus for water purification, electrochemical sterilization units being water treatment equipment for use in residential and commercial heating, ventilation, air conditioning (HVAC), and other air and water management systems that utilize electrochemical treatment to prevent biofouling; electro-chemical systems in the nature of electrostatic electrostatic and electro-chlorination water treatment apparatus, electrochemical water treatment apparatus for water purification, electrochemical sterilization units being water treatment equipment for use in preventing heating, ventilation, air conditioning (HVAC) condensate pans and drain lines from becoming clogged; electro-chemical systems in the nature of electrostatic electrostatic and electro-chlorination water treatment apparatus, electrochemical water treatment apparatus for water purification, electrochemical sterilization units being water treatment equipment for keeping heating, ventilation, air conditioning (HVAC) condensate pans and drain lines clean, clear and flowing