This is a hop-stopper from http://www.theelectricbrewery.com/hop-stopper. Cost to buy new shipped is $76.50. Asking $61.50 shipped lower 48.
This is a pic inside a 10 gallon Blich.
Below is a pic out of the pot.
This unit is specifically designed for a 10-30 gallon Blichmann brew kettle and requires removing the collar from the diptube and installing it on the hop-stopper.
Why are you selling? I had one of these on my old keggle system and it worked great. Is there an issue w the flat bottom of blichmann product?
I recently upgraded my system and have gone a different route for hop filtering. It does work well. My only issue was having to slow the flow to a trickle once the level in the brewpot reached the hopstopper.
Ill bet the problem is venting- if you can break the vacuum from the drain it would be fine.