Quote Originally Posted by haknslash View Post
Did you ever end up flipping the check valve when you said your midship bags wouldn’t drain or prune up all the way? Is the “loop”necessary by the midship bags or can I just run my midship vent tube lines and T directly to the rear bags? I’m about to install my midship vents and just trying to make sure it fills, drains and vents correctly using the check valves. There is no markings on the check valves for which direction is the path of flow.
The only thing I’ve changed since the original install is adding a T and using both vent ports on the top of the midship bags. I don’t recall if I posted pics of that but I will later today. The loops may not be necessary but the system works fine so I’ve left it alone, no issues with air getting trapped that I’ve noticed. It drains completely too, I’ll usually wait to drain the last 10-20% when I’m cruising home to help move the water to the stern.

To figure out the check valve direction blow in it with your mouth (lol sounds funny but it works)!