Does this cap stay on the siphon cane?

[Rob2010SS]

Bought a separate racking cane for my journey into closed transferring. It has a black cap on the bottom. Is this meant to stay on during use? It doesn't close off the end, liquid can still get through it. Kinda seems to me like it could oxygenate the beer a bit as it enters so I'm PRETTY sure it is not intended to stay on during use. Just wanted to be sure.

Thanks

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[betarhoalphadelta]

Yes, it stays on. It exists to keep the end of the cane above the level of trub in the fermenter and keep the trub from getting into the cane.

It won't introduce oxygen because the entire cap and end of the cane are under the liquid surface. There's nowhere for oxygen to come from during the transfer.

 

[cswis86]

It's supposed to stay on. It helps prevent trub from entering the siphon. If you keep it immersed in beer you won't introduce any air.

 

[Rob2010SS]

Thanks for the quick response!