I have concerns about whether those are food grade and they would be introducing oxygen ingress. There may be a way to purge with CO2, but seems to be problematic. They make peristaltic pumps that might be a better solution?
After seeing how simple it is to transfer to kegs without air contact, I started doing it and would never go back. It definitely helps reduce cold side oxidation and improves beer longevity and stability. But that’s for kegs.
If you’re bottling and bottle conditioning, then the ability and the need to avoid air contact during packaging is lower. I could see that the OP’s options are limited and any of the transfer tools should work. I have used that plastic siphon pump. But I have to admit that one of the happiest days of my brewing hobby was when I started kegging. Bottling sucks, but it’s appropriate for long-lived beers.
Hopefully, no one is still transfering “to Secondary” anymore. That is one step that almost no brewer needs to do. But if you were, it would help to transfer without air contact.
Fill the racking cane and tubing with water or sanitizer. Close the tubing with a thumb or clamp. Put the racking cane in the beer. Open the tubing and run the liquid in it into a pitcher, then xfer the tubing to the bucket or keg.
Thanks. I Don’t get a fuzzy feeling about sticking the auto-syphon in
wort. Inside the auto-syphon there’s plenty of room for
critters to hide. In my whole process it’s the weakest link for possible contamination.
Sanitation is key with anything going into the finished beer. I will use an autosiphon on my Big Mouth Bubbler, but after sanitizing it, I hook the tubing to the liquid out disconnect of a CO2 purged and charged corny keg - the CO2 pressure in the keg goes into the tubing, autosiphon racking cane and autosiphon outer tube to “purge” the line (at least somewhat - watch for the pressure to drop fully in the keg to equalization with the autosiphon in the headspace of the fermenter); then I dip it into the beer through the bung hole and pump once to start the siphon, also wrapping food grade plastic wrap around the lid opening and autosiphon interface.
Not absolutely as oxygen free as I might want, but it covers the situation where I am not fully closed loop (with my other fermenters where I can loop the CO2 from the keg back to the fermenter).
I used to do it this way when I used an autosyphon. However, I use roughtly the same method when kegging from the fermenter. Purge the transfer line and/or inline screen with CO2 from a purged and charged keg before starting the transfer. Works well for me.