Hi NB, welcome to the Nexus. I'm pretty new here too.
Have you thought about using a
separatory funnel?You'd have to filter out your plant material first so it doesn't get clogged up but after that it's just a matter of turning a valve.
I made one myself out of a wine flagon, clear pvc tubing, large cork and a small ball valve. It can hold over a litre of liquid and it works great
Here's a pic of it:
Musiek attached the following image(s):

sepfunnel.jpg
(179kb) downloaded 44 time(s).The day is coming when a single carrot, freshly observed, will set off a revolution.