Ordered this as a replacement. The first failed because the o-ring dry-rotted after about 2 years and started leaking. The new one seals well and I've used it a couple times with no issues. Good flow rate for wine. Too fast for 12oz beer.

Or maybe I'm just too slow, but I have a nice easy rhythm with my smaller diameter bottle filler. This larger one doesn't give me time to snap my grolsch cap into place and grab another empty before beer is gushing out the bottle top.

Works well although flow rate is pretty high 3/8" might be better

The filler worked just as advertised, but leave way too much head space in a 12 oz bottle.

It never seals and beer pours out the valve .
I cleaned it, tried sealing it by pulling the end.
Still leaked. Not happy losing valuable beer and having to wash all my filled bottles because this thing dumps beer all over the sides of the bottle when moving to the next one.