Is that your setup? Other than a bit dirty it looks right. If this is connected to the downstream side of your regulator you do have to make certain that there is no regulator on the devices that you use, and they will work fine at 11" Water Column which most but Coleman do.
I have a Low Pressure Disconnect, and have had one for 10 years. I just love it. No touting around those little green bottles that always run out, and I can operate up to two devices at a time. I use it for a propane
fireplace, BBQ and stove.