After adjusting the gas pressure or changing an orifice, what should you check to ensure correct operation?

Checking the input at the meter after adjusting the gas pressure or changing an orifice is essential to ensure that the system is operating correctly. This process, often referred to as "clocking the meter," involves monitoring the flow rate of gas to verify that it matches the expected consumption and that the system is delivering gas efficiently and safely. It's a practical method to confirm that any changes made—whether to pressure settings or orifice size—are resulting in the desired gas flow without any discrepancies.

If the input at the meter is not as expected, it may indicate issues such as incorrect pressure settings or orifice sizing that could affect the performance of the appliances fed by that gas line. This step is critical in maintaining safety and efficiency in the entire gas delivery system.

In contrast, while checking the venting system, measuring the water column pressure, and inspecting all connections for leaks are indeed important procedures in managing gas installations, they focus on different aspects of system safety and performance. Venting concerns could indicate proper exhaust of combustion gases, water column pressure measurements ensure adequate gas pressure is being delivered, and leak inspections are crucial for safety. However, verifying the meter input directly relates to determining if the adjustments made have had the intended effect on gas delivery and system performance.