at 246 in video he shows a pretty good shot of how it should be assembled. but basically . you have two screens. a false bottom to filter the grain bed. and a top screen to disperse the pump return water. the top screen is the one with the two small brackets on it. those face upwards on top of the return pipe and are used to lift out thte top screen for access to the mash. i stopped using it several brews ago. it didnt effect efficiencey.
from bottom to top
the 1/4 inch smooth nut goes under the false bottom screen.
then the false bottom goes next. the lip of the screen (WHICH S SHARP!) must face down to catch the lip inside the mash tun tube which is facing up (also sharp) . this makes a seal to prevent grain from going through the tun.
then goes the 1 inch smooth 1/4npt coupler.
that looks like this:
then you attach the telescoping mashtun overflow pipe. the small tube goes inside the big one to create the adjustable height tube.
then the adaptor goes on (seen at the top of the tube at 4.18 in the video) so you can put the white cap over the tube. the cap prevents grain enter the tube during mash in. this part of the system is the biggest flaw as the top of the telescope can slip into the the bottom tube after dough in when you are trying to place the top screen on.
i dont use the top screen and i got a small bazooka filter to screw on top of the tube instead of the adaptor and cap. i got a longer retunr tube and use that to circulate the water above the grain bed right below the air/wort interface. i also use the mashtun as an underletting system placing all the grain in the assembled tun then slowly lowering the tun into the strike water. it is easier this way for many reasons., just maintain a little pressure on the return tube so the false bottom doesnt get pushed up by the water underneath.
the youtube video is very good but i think he said he uses the pump to transfer to the fermenter and the manual specifically says not to use the pump after the boil cause trub can mess it up. it also says not to use it above a certain temp ( i think 160?)
otherwise this has been one of my best homebrewing investments.
https://www.amazon.com/VEVOR-Device...31&mcid=a6d287bb24ed3b718506ea113c52c6e3&th=1
great price
i think i paid 260
enjoy its a lot of fun it really makes mashing and boiling much easier.