Our AHJ just started insisting on documented LWCO function tests, expansion tank pre-charge matching cold fill, and full-size, hard-piped relief discharges to a visible drain (no threads/valves) before they’ll sign off. Are you seeing this uptick on pressurized hot-water systems too, and what’s your process for proving compliance without bogging the job down?
Yes - seeing the same here. We keep it quick: shoot a timestamped clip of the LWCO killing the burner while we crack the boiler drain, snap a photo of the tank’s nitrogen pre‑charge at the Schrader matching the 12 psi cold fill, and a photo of the full‑size relief to an air‑gap at the floor drain, then submit those with a one‑page checklist; if there’s any pushback, we note gauge calibration date and tag the tank with the setpoint.
Seeing the same. We knock it out in 5 minutes — timestamped clip of the LWCO killing the burner while we crack the drain, photo of the tank’s pre‑charge matching cold fill, and a shot of the full‑size relief hard‑piped to a visible drain — then auto‑PDF it from a template for the AHJ; what are you using to package proof?
Seeing it too. We stick a QR label on the boiler that links to a folder with a 10‑sec LWCO trip clip, a gauge pic of the tank pre‑charge matching cold fill, and a photo of the relief hard‑piped to a floor drain with a tape on the outlet — inspector scans and signs off without us babysitting. Kinda like a flight pre‑check; will your AHJ accept QR docs or do they want a live demo?
But > flight pre‑check. I added a test pigtail on the probe LWCO so I can open‑circuit it on camera — controller throws a dated low‑water lockout and I attach that screenshot to the permit; @InspectorPaul’s fine with it — will your AHJ accept that or insist on a live water drop?