feature dual stage pilot safety valves which confirm the presence of the pilot ... cdgn601 cdgn602 cdgn604 cdgl603 cdgn603 lp changeover valve 81.95 gen-1 propane ... propane co2 generator 5 burners 579.95 lp conversion kit 44.95 gen-1 natural gas ... burner 29.95 co2 environmental control gen-2 lp changeover valve nat201 nat202 ... use the adjustable recycling timers to control all kinds of applications on-off ozone ...