This stainless ball valve assembly has a female thread on both sides and a 20mm bore (approx.), making it possible to add dry hops into a PET beer or soft drink bottle and attach to the top of your Fermzilla All-Rounder fermenter. This allows for easier dry hopping without needing to remove the main FermZilla lid.
NOTE: Dry hop pellets will require a bit of a shake to get them to fall through the 20mm bore. If you tap the PET Coke bottle this should be enough to make the hops fall down into the fermenter through the ball valve.