Quote Originally Posted by jcredible View Post
1) My 2019 have 3 plugs in the bottom of the bag(2 x Pump Fill\Empty and 1 x overflow with sensor in it)
2) I have 3 x with the diaphrams tha slowly let air out at the back of bag and top of bag
3) There is a 4th plug that I can unscrew to manually burp the big pocket of air that happen on first fill everytime.

Make sense?
The 2018 dont have the sensors in them. Mine have 2 fill drain ports on the bottom and 2 overflow ports on top. No burp valve. Anyway to add one?