So how do they work? If you don't put on the cathether do you shut off a valve from the outside or is there a "check valve" that prevents the ocean from coming in?
Mine is very simple, not balanced or fancy, but it is a screw valve on the leg of the suit, inside is tube runs to cath, cath is glued to me, when you go , you turn the screw, it runs out, close the screw, if you are not hooked up you just dont turn the screw, i dont know about the balanced ones.
btw.... any tips on post divecare & glue removal. (spent an embarrassing xmas eve at inlaws glued to my undershorts after 1st time) worst part of the process, I do the Band Aid quick tear & cry......:banana: