The hoses don't have a regulator, but a really simple gauge on them to show if the tank is full or not. It looks like RV's have a regulator manifold that switches between tanks when the one gets empty. I'm not sure if it really if it allows drawing from both at the same time or not.
I have been reading here and other places, Zoeller's website calls out about different bottle fittings having different flow rates. I can find the lefty screw into the internal threads labeled as full flow, but don't see that for the RV tank hook ups.
So far my idea is to run two flexible RV hook up hoses into a tee to a solid mounted regulator, after this regulator it will be lower pressure and ran through hard lines as the tanks will store in the bottom of the forge stand. Alternatively I would have to get two high flow fittings and two high pressure hoses to go into the gas regulator, not a big deal.....but I kind of like the no tools method of hook up as well as the full or empty indicators of the RV hoses.
Zoeller does sell a hardline manifold kit, but really hoping a flexible one with these plastic nubs that use the outside threads of the propane tank flow good enough. I'll probably buy a set and then convert if it doesn't work.....ideally if I knew a single 30lb would run two burners I could trade the extra hose off to recup some cost of the forge set up.
Q. I fired up the forge with no problem it put out a nice flame, but then I went to fire it up again later on all I got was just a minimal flame (looked like a cooking flame) with no pressure registering on the gauge. As soon as I shut off flow to the burner the pressure would come right back up any ideas? A. It sounds like you are running a 20 # LP cylinder with an excess flow device , and that is what is causing you your problem. When using a tank with an OPD valve with the excess flow device or check valve, it is better to light the forge, starting with all of the valves turned off. Then turn the triangular hand wheel one complete (360 degree) then turn the forge on and light it up. From here you can adjust slowly for a higher flame. There are a couple of other things that can cause you to have similar problems, you need a full flow POL (tank fitting). There are some that have an Excess Flow Valve built into them and there are others that have a fixed orifice, these will not work. The other thing is to make sure that you have the proper LP regulator like the Fisher model number 67CH-743, you can not use the regulators that they sell for gas grills and small appliances; they do not have the BTU ratings that you need. After a forge is up and running and one of the burners starts to flutter, it may be so that the burner is sucking in exhaust fumes from the forge openings.