Each appliance’s input is determined by the manufacturer, then stamped on a rating plate, and permanently affixed to the equipment. Appliance inputs – The appliance input, determines the amount of gas required by the appliance.The architectural drawing will be needed to identify the locations. Appliance location – The appliance’s location is usually fixed by the building design and not the gas fitter.In many jurisdictions the only meter pressure available for a residential service is now 2 psig. System pressure – For residential meter sets the gas utility will supply two options for outlet pressures, either a 2 psig of a 7″ WC.In other cases, propane may be supplied from a storage container. Gas supply – The gas supply may be a meter installed by a local utility company for natural gas or propane.Knowing the following details will also help you properly size the piping system. A drawing of the whole gas piping system allows you to identify and locate important system components and create a materials list.
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