My 2011 X213 has two tubes on the street side. The valves to open the drains are inside the door underneath where the refrigerator is inside the camper. You pull the handles up to open and push down to close. You may be looking at the fresh water tank drain valve that is close to the low point drain tubes.
There are two valves for low point drains on the X213 -- one each for hot and cold piping -- in the cabinet under the fridge as fochman said above. The outside valve behind the tires on the drivers side is the freshwater tank drain. I think sometimes it is miss labeled.
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Jayco Pinnacle 36FBTS Fifth Wheel
Ford F-450 Diesel Pickup