This works for all the Weber Q's 100,120,200,220,1000,1200, etc. The problem is that these are sold as High Pressure propane appliances designed for using the throw away 1 pound propane bottles or with an adapter hose the larger propane bottles. The issue to be addressed is that while the Q grill has a regulator attached at the gas adjustment knob, most RV supply systems are piped after the RV's propane regulator. Many users complain that this 'double regulation' causes low flame and low heat. The simple solution is to replace the Q's regulator with a Model 250 male quick connect. The file "WeberQ.pdf" is attached and has instructions, pictures and part numbers. This is an easy mod, cost about $25 and one that can also allow you to keep the ability to use throwaways.
WeberQ Convert.pdf