A professional plumber typically takes between two to four hours to remove an old water heater and install a new standard tank-type unit in an accessible residential location. The timeline can vary based on factors such as whether the installation requires upgrading gas lines, re-soldering copper water pipes, adding a thermal expansion tank, or adapting to new seismic strapping and building code requirements. For complex conversions—such as switching from a standard electric tank to a hybrid heat pump system or installing intricate tankless venting—the installation process may extend across a full working day.
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