Join Date: Jul 2013
Location: SoCal, United States
Check valves are a safety measure to keep the DIY bottle from siphoning water out of the tank. Not required, but a good idea. Don't want to use one? Place the water line of the bottle above the water line of the tank.
Last edited by djjcoleman; 08-31-2013 at 08:59 PM.
Reason: extraneous text