Check the reviewed permit path.

Philadelphia

Plumbing permit, EZ plumbing, and inspection certification check for water heater work

Philadelphia L&I says a permit is needed for plumbing installation, alteration, replacement, and repair, with limited no-permit categories for minor repairs. The L&I plumbing permit page lists a water heater permit fee, and the EZ plumbing standard includes alterations for replacement of water heaters only as eligible EZ plumbing work when the standard is met. Water heater replacement or conversion should be checked with L&I because the scope can involve plumbing, gas, electrical, mechanical, Department of Public Health review for large hot water heaters, or required water-heater certification before final inspection.