Slightly off subject but since it's been discussed in this thread and the other thread is more or less dead, for those doing closed transfers with fermonsters modded to have floating dip tubes, are you not running into flow issues? I'm about ready to go back to a spigot as I've had too many instances where I have to mess with it a bunch to get it to work right which defeats the purpose
for starters it takes a lot more pressure than I would expect to get the initial flow going. If there is even the slightest bit of a leak in the weldless fittings in the lid It can be a problem.
Secondly, after all the dry hopping the dip tube is sure to be clogged so I always blow gas through the liquid post a couple times during the crashing process.
Even with that, I've had issues getting the flow to start. Other times it will work great until I get to the last gallon at which point it stops. I've cut the tubing to try to make it so the dip tube won't go much lower than the gallon mark... Perhaps I just need to cut it more and just tilt the fermenter to get the remainder?
I just got done racking a beer that completely stopped no matter what I did. I eventually gave up and scrapped the last gallon above the trub and yet when I took the lid off and ran water through the post it came right out the dip tube so I have no idea what was stopping it from flowing. I could see the dip tube in the beer and it was not directly sucking up trub and when I blew gas through it it bubbled.
I hate losing beer so I dumped the remainder of semi-clear beer into a gallon mason jar and will wait for it to settle out before decanting it into PET to force carb and drink quickly but this sucks
This has been a dance I've been learning as well. I've ran into all of the above issues, including broken lids. You end up flying through C02 if you have leaks, so here are some things that I've done to make things "better:"
- I've stopped dry hopping "excessively" in the primary. Sometimes I get drunk and toss in an ounce or two for the "biotrans" hopping, but usually I keep it to whirlpool and dry hopping only. This saves your CBD dip tube. Recently, I ran out of kegs to dry hop in, so I had to dry hop in the fermonster. I soft crashed at 50F to get all the hops to fall out, but I still lost about 1/2 gallon of beer once the dip tube got near the hop bed. Either brew sacrificial beer or keep the hopping in the fermonster to a minimum
-pressure to get it to transfer: 15psi seems to be the sweet spot. Any more and your ball lock towers start to leak around the base, or you risk deforming the vessel, or breaking a lid. I usually drink a beer or two while I do the transfer, casually releasing the pressure of the purged keg to keep things flowing. It takes usually 15 minutes if things don't hang up.
-leaks around the lid during transfer: if you have a fermentation that "goes nuts" and krausen gets all up in the lid and spills out of your spunding valve, make sure to never "reset" the lid seal if you have a leak, especially if you have hops in there. It'll gum up your lid if you un-tighten the lid and re-tighten, and your leak will be that much worse and you'll fly through c02. It's best to set it firmly and forget it
-clogged CBD tube: light blasts of c02 at 10psi usually clears it. The last transfer I did 15psi didn't clear the CBD.. pellet gunk got near that metal "ring" in the end of the tube and jammed it. If the floating ball was attached some other way, it'd prevent a lot of jamming. But then it'd just gum up the ball lock, so maybe it's a good "filter" of sorts. Maybe adding holes in the metal behind it will allow beer to still slowly transfer?
It's an art for sure. But keeping dry hopping to purged kegs and cold/soft crashing before a transfer makes it better. If you do get a jam, it's at the back end, and usually it's only about 1/2 gallon loss, rather than an oxidized batch. So over-brew a bit and you should be gtg even if you're dry hopping in the primary- I know you hate losing this beer, but I end up using it for gravity measurements and tasting notes after I pour it out and let the trub settle out of it- it ends up being quite useful. (that "primary vessel dry hopped" process yielded me an amazing beer btw with s04/t58/wb06 yeast blend... wow. I served it at a party I threw with a LA3 NEIPA and everyone loved the former over the latter)