Hello i tring to figure out why my hot water heater is not.running.on gas I've taken everything apart one at.a time I've checked the gas valve.both solenoid on the gas valves and the thermostats a/c & D/C side and all are working then i pulled off the line that goes directly to the valve.and I'm not.getting gas through the feed line to the valve that opens I've chased the hose to a manifold block which my stove works all burners and my furnace works the L.P tank is full I've tied with a half full tank 30 lb and I just filled a 100 lb tank nothing both tanks will run the stove and furnace but I have no flow through.the line to the solenoid valve my spark ignition is working and i can hear the valve click on and off it will do it.3xs and i have to reset it.but it's not.going to fire if it cant.get gas through the supplyline can this be a bad manifold?? Cause everything else.is working but the line going to my H.W.H the manifold has a direction arrow but the arrow is pointing towords the tank and not in the down hill or lower pressure side could this be the problem I've never had any trouble with it not working since ive.owned.the 5th wheel which is by the way a.2021 Montana Bighorn 3300 DL any help with this would be appreciated I'm sure I'm not the only person that this has happened to i appreciated your time and experience if you know what the problem is ?