Silly question about PT-020 Housing....

My PT-020 housing came with an instruction manual but I cant see where it describes in which position to install the included O-rings. There is a fat O ring and a skinny O ring. Does the fat one go into the back door channel and the skinny one into the body channel or is it vice versa...Thanks

I don't know if you already have an answer to this but....

...I don't know. Sorry, couldn't resist. I have the PT-015 and the o-rings are the same on it. But, in case you have not gotten an answer yet and need one, the folks at Backscatter are extraordinarily helpful. You can reach them at 831-645-1082. Good luck.

The normal way with fat and skinny O rings is

on the tetra housing .. Fat closest to the main housing body and the skiny one closer to the lid.

Normally when you put them in it looks wrong the wrong way round.

the main thing to remember is clean and greasy, and it will work whatever, but look at the size of the grooves the orings are going into .. one should be bigger.

if its not .. then why would they put 2 diff size orings in.

Giles