Propane extension

I did the exact same thing with our Roadtrip grill and it works great. Using two regulators in series won't work, thus the need to remove the one on the grill. The needed fittings and hose are readily available but had to go to several different places here for them. Our TT had a capped tee underneath and I would look to see if there is one underneath already. If not, perhaps you can add a tee where the iron pipe converts to copper for the furnace, fridge or WH. I initially used a 1/4" hose but later replaced with a 3/8" to reduce the pressure drop at the grill and got one that is more flexible. The 2nd pic is what I did on a previous TT and I ran a 1/2" hose to where the tee was and installed the quick connector at the very rear of our TT.

Don't particularly like the Coleman grill and would get a Weber next time.

Gene&Ginny wrote:

pennstaterv wrote:
... my propane griddle came with a regulator that has an output pressure of 11" W.C. and 95,000 btu. ....

The auto changeover and regulator on RVs has 11" W.C. output to feed the stove, fridge, and furnace. You need to remove the regulator from the grill and use the low pressure from the RV directly to the grill. I did that with my Coleman Roadtrip grill. I have a long hose from my grill that I plug into the existing quick connect on the trailer. No messing with extra tanks or high pressure connections.