Question setting up dual propane tanks - Jay Series 1007

[micklouie]

I have a Marshall 290-00 regulator on my Jay Series 1007 pop camper. I would like to hook up another tank to my system. It looks like I need a check tee to do this? It sounds from the book that this tee will allow me to remove the empty tank when need without shutting down everything. It states that there is a disc check built into the tee to prevent gas from escaping when the empty cylinder is removed for refill.

Without going out and buying a new regulator does this sound correct?

Where do you buy these Tee Check?

I would like to use my existing regulator and ok with manual changing the tanks over.

Thank you,
Mike