In cold climates, prepare for winter by eliminating the shutoff Y-splitter, backflow preventer, controller, filter and pressure regulator and bringing them inside. Remove finish plugs and drain or blow the water out on the system. Exchange the caps and plug the faucet end of the tubing too. Independently analyzed http://jaredcmsxc.widblog.com/21025875/top-guidelines-of-water-filter-systems