Not on an open circuit. A regulator only allows a maximum psi, not a minimum so the deliverable volume is an issue. It shows pressure through the jet, an open hose or fitting allows enough flow the pressure will be below the gauge's read level. I've been thinking about your problem and the blockage was my first thought, followed by icing in the regulator or jet but if those aren't the problem I'm kind of stumped. Okay, here are a couple back ground issues that might help me get a handle: 1, Are you using propane rated hose? 2, did you use teflon tape or ANY thread sealant? What size Rex do you have? Frosty The Lucky.