yes. Drain system then run a hose (rv usually comes with a hose with male fitting an no fitting on other end to put in rv antifreeze jugs) from antifreeze jug to connection turn pump on an flush. Takes two to switch out gallon jugs or you have to run ack an forth. I took a water can that had a fitting for a water valve so I could put antifreeze in it then hook up so I could stay inside an flush all.
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