The service call: the new-install walkthrough. Episode seventy-two of the Gas Service Animated series.

A finished basement remodel added a gas fireplace and moved the dryer. Another contractor piped it; you're here to test, connect, and light — which means the system's history is unknown and your name goes on its future. The walkthrough is how you earn that signature.

First pass, eyes only. Materials: black iron and a run of CSST — listed, and is the CSST bonded? Find the bonding clamp — there, at the electrical panel, six-gauge. Supports at code intervals. Drip legs where they belong. No unions hiding in walls. Connector arrows right. Ten minutes of looking beats an afternoon of finding.

The system's new work has to prove itself: pressure test per chapter eight. Appliances isolated, gauge on, pumped to test pressure — at least one-and-a-half times working, and not less than three p-s-i — held for the code's duration. The needle doesn't move. A drop would mean a leak until proven otherwise; a flat needle means the pipe's story checks out.

New pipe is full of air, and air reads as no-gas at every burner. Purge deliberately: outlet by outlet, gas proven at each appliance connection, done with ventilation and no ignition sources — the controlled little ritual from the startup episode, at house scale.

Now each appliance earns its flame. The fireplace: listed unit, damper per its listing, millivolt pilot proven — thermopile numbers healthy. The relocated dryer: new metal duct run, connector not kinked behind it, moisture-lint screen clear. Each lights, proves, and cycles under its own safeties before the next one starts.

The remodel closed the utility area behind new walls — so the combustion-air math gets re-run for the space that exists now, not the one on the old plans. Openings sized, present, unblocked. And the water heater's draft gets the five-minute worst-case check with the new doors shut. Remodels starve appliances quietly; you check loudly.

Then the whole-system finish: every joint you opened or made, bubble-tested at operating pressure. Meter clocked with everything firing — total connected load inside the meter and regulator's capacity. The system breathes as one thing now; test it as one thing.

The handoff makes it real: labels on valves, the customer shown every shutoff, operating instructions left at each appliance, and your documentation — what was tested, at what pressure, for how long, what was lit and proven. The next tech should be able to read the system's birth certificate.

The walkthrough in one breath. Eyes first — materials, bonding, supports. Pressure test to the code and hold it. Purge with discipline. Prove every appliance under its own safeties. Re-run air for the rooms that exist now, worst-case the draft, test what you touched, clock the whole load, and paper the birth certificate. That's the service-call season: the whole catalog, on one ticket at a time.