16 psi is unique to the HP exterior stoves on some coleman trailers (after they stopped using Coleman stoves???). Those unregulated stoves operated via 16 psi propane. A 15psi or 20 or 30 would work fine for almost any regulated appliance or an adjustable one. FWIW, I got a baby Q to operate fine off my regulated low pressure outside port, another stamped metal little grill worked but turning it from low to med to high caused no change in the tiny flame. Both were with the grill's original regulated still attached. Tried a portable buddy heater with reg intact, fluttered and did not operate well.