How do I pressure test a gas line

How to Set Up a Gas Pressure Test
1. Disconnect all gas appliances and the meter if it is still in place by disconnecting the flex line from the hard pipe. (Do not merely turn off the valve. The test will not hold and may ruin the valve.)
2. Put hard caps at all the ends of the hard pipe except one. (Use pipe joint compound.)
3. At the open end of the pipe, install the pressure gauge. If there is only a female fitting, you wall need to use a nipple. Use pipe joint compound. Make sure the gauge ends up on top, readily visible.
4. Attach a bicycle pump (or compressor) and pump gauge to a minimum of 10 lbs. of pressure. It must hold for a minimum of 15 minutes, without any perceptible drop in pressure.
5. If it does not hold, test all joints by brushing soapy water on them. Start with end caps and joints at pressure gauge.
6. When gauge holds for 15 minutes, call for inspection. (You must have a permit prior to the inspector coming to your location to inspect.)
7. The inspector will verify that the pressure is holding, tag the gas line.
NOTE: The pressure gauge must remain on the gas pipe, holding pressure, during the inspection and must be under test prior to the inspector's arrival.

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Originally Posted by speedball1

How to Set Up a Gas Pressure Test
1. Disconnect all gas appliances and the meter if it is still in place by disconnecting the flex line from the hard pipe. (Do not merely turn off the valve. The test will not hold and may ruin the valve.)

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If testing where the UPC is applicable, you must test through the valve/gas cock.

I usually just put a plug or nipple and cap in the end of the valve/gas cock.