Originally Posted by jmnsn57
Anyone with experience as a gas pipefitter - propane, natural and hi, or low pressure systems would tell you get a professional. Regulators, pipe dope and teflon tape are different for gas vs. other applications. If you don't know what you are doing it could be disastrous. I went through this exercise with my plumber/HVAC tech brother and the cost to do it right went through the roof. We now put my WeberQ on the on the picnic table with a $3 1 lb. bottle and cook all weekend. Never had a Kaboom.
Use quick connect fittings designed for LPG not compressed air, use yellow teflon tape for gas, use black pipe (never galvanized) or copper with flare fittings as piping, spray test all fittings with soapy water mixture & using a bit of common sense there shouldn't be an issue, professional pipe fitter not required.
With a Y fitting specifically designed for the purpose I added a 25' hose directly to the 30 lb bottle on my 5th wheel that was made up by a local LP distributor for about $35 IIRC + the appropriate fittings to connect it to my Weber grills regulator that cost another $20-25 afterwards could sit my grill just about anywhere on my campsite that suited me.
If connecting directly off of the tanks will be high pressure, 250+/- psi, anything after then rv regulator will be low pressures, 25-30 psi.
A word of caution if using the 1 lb bottles, don't spend $ on that joke of a device that claims to fill them from your 20 lb bottle. To be correctly filled you would need to turn the 20 lber upside down to fill the 1 lb with liquid, once the 20 lber is turned upside down the overfill device will close flow & you'll get nothing in the 1lber.
Just to be clear, I spent 30+ years working on high pressure petroleum pipelines one of which was LPG running 2000-3000 psi.