Newell Gurus

What is the consensus on the rear wet tank drain? I have an auto drain and the last time I pressed the Shrader valve there was water coming out. (This was before I replaced the air dryer) My question is should I remove the auto drain and plumb in a manual valve like I did for the front two tanks? I am thinking the rear tank will get dropped next since I would like to replace the check valve and give the tank a good examination. (Assuming Newell engineers didn't weld the tank brackets above the chassis blocking the bolt head) I am sure that one will be a doozie to get out due to the large size and proximity to chassisfanalia.

I am a fan of the manual. The auto drains and lanyard pull drains can get debris in them and become difficult to reseat. Plus with the manul, you see what is coming out of the tank.

I figured the same thing but I wanted to hear it from my trusted Guru