I've been reviewing some instructions before flushing my water heater - and one of the first instructions is to shut off the gas valve to the appliance.
The trouble is, I'm just not certain enough to proceed. Is what I'm looking at is the shutoff valve mentioned in the instructions on the heater? How can I tell?
In case it isn't clear from my little collage below. The valve is located prior to the on the only pipeline leading to the "gas in" location on the honeywell thermostat whose manual I've found, here.