What are I/O Systems? (Innovative/Alternative Systems)
Alternative systems are non-conventional systems. They are designs used to deal with environmentally sensitive areas such as nearby lakes or ponds. Other situations which may require alternative systems would be a lack of space to build a conventional system. Some examples of alternative systems are recirculating sand filter systems, individual sewage grinders/treatment units, and tight tanks. Alternative systems are generally avoided and only used out of necessity due to added cost and maintenance.
