I'm installing a new, natural gas water heater. For the gas hookup, which is best: brass tubing and fittings, or stainless steel tubing, and valve? What about mixing stainless with brass and iron pipe? For example, can a brass ball valve be used along with an iron supply line and stainless flex line to the heater?
Also, does anyone no of a "pilotless" natural gas water heater?