Stow N’ Flow Automatic Injection System. The Stow N’ Flow marries the convenience of the ProFeeder with a 5 gallon tank for larger lawns. The ProFeeder easily installs on any irrigation system and allows for automatic fertilization and/or pest control every time you water. The ProFeeder adjusts the feed rate based on water flow, so users don’t have to worry about over- or under feeding. The Stow N’ Flow includes the ProFeeder, 5 gallon tank and Jumbo Valve Box for hidden installation.