To be honest I do not recall the size of the fittings as it was awhile ago. But you will need a short nipple to go into the changeover valve, a tee and another short nipple for the QD fitting. Be sure to use thread tzpe and also a QD rated for use with gas. I got the QD from Family Farm and Home, but I'm sure there are other sources. The QD is the expensive part. Reuse the short nipple originally in the changeover valve to connect the existing gas line to the bottom of the tee. If you decide to connect like this - after the regulator on the camper, remove the regulator from your grill but NEVER use that grill on any other gas source except this one as you will have an explosion hazard. Hope this helps
