Water Heater Replacement Sizing and Permit Agent

Replacing a water heater means choosing the right size and type and meeting code for venting, expansion tanks, seismic straps and drain pans, and a missed item fails inspection. This agent collects household size, fixture counts, existing unit details and photos, calculates the first-hour rating the household needs, and suggests suitable units. It then checks code requirements for the location against the planned install and lists required parts. If a code item is not met, it adds the missing part and checks the plan again. It drafts the permit application. The plumber approves the unit, the parts list and the plan, and submits the permit. Edge case: switching from gas to a heat pump unit triggers checks for electrical capacity and space, since those can turn a simple swap into a bigger job.