here is a Pic of what happens , the pedal will not go back up all the way and the chute closes far enough(or Not) to seal but thee water keeps trickling in and you walk away (or go to sleep) and it floods, when you take the pedal off and look behind it you can see where the spring and other tabs that fit into a series of honeycomb holes and they are made of cheap plastic ,they break or bend so the spring etc.. do not grab or fit into them loosely or break and Yes You buy the Tall profile Dometic 310 only mod you have to make is to use the Thetford Gasket instead of the Dometic and the water line has to bend a "little" to fit ,The Dometic 310 Works SOOOO much better
and it is a skinnier design and fits better too
[/URL][/img]