brosnt1
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I'm installing a Rinnia tankless water heater that will operate on propane. I'm confused about the size of the gas line. The manufacturer requires a 3/4" line to the heater (up to 180,000 btu). I have a 1/2" copper line form the 500lb tank outside to the input side of the regulator on the side of the house. on the outlet side, the regulator is tapped for 1/2" npt fitting. I have asked the Propane company if this regulator is big enough to supply this heater and a 75,000 but furnace, a stove, and a gas fireplace and they said it will. It doesn't make sense to me to come out of the regulator at 1/2" npt and increase to 3/4" npt, unless the 3/4" pipe allows more volume to flow? can anyone explain.
Thanks
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