White-rodgers universal water heater gas valve- up to 75,000 btu 37c73u-168 gas water heater ctl, for nat gas only, 1/2″ n.p.t. Inlet, 1/2″ inv flare outlet, 70f-160f range, fully reg main and pilot reg fixed at 3.5″ w.c., single cycle e.c.o. Set at 195f