Pumps: Cross Contamination?

[Proteus]

Drain your hose prior to using for ro waters you want. The only contamination may be salt but shouldn't be enough to worry about

[Craigdillman]

That should all be good only thing I worry about cross contamition is anything used in my QT tanks hose included I keep with it's own stuff

[spedly]

Thanks for the replies. I havent't seen anything bad happen so I didn't think there would be a problem. Thanks for confirming my suspicions.

I usually soak the pump in some RODI water for a few minutes before I move water from the RODI container to the mixing container. Whether or not that makes a difference I don't know.