tracer bullet wrote:make sure to turn things on in the right order, it makes a difference. Something about how the regulators work
this reminds of me calling tech support & getting asked if i turned off the device and powered it back on. only difference is this can't possibly help
consumer grade regulators like what you are using are spring regulators. downstream pressure must load the diaphragm in order to overcome the force of the spring/actuator. The nature of this action opening & closing the supply orifice nullifies your suggestion that order of operations makes a difference. In other words, they are full open until downstream pressure says otherwise.
Spring regulators are somewhat binary. Either the pressure down stream drops below the spring force which releases the seat from the orifice or the equipment ceases demand causing pressure to equalize which seals the seat against the orifice. If all downstream pathways are open then the circuit goes full send to ground. Although highly unlikely, your suggestion actually would be more likely to mitigate CFH than augment.