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The Bay Area is phasing out gas water heaters starting in 2027, which means all new sales and installations will be heat pump water heaters. Before making the switch, it’s important to understand that heat pump water heaters have different installation requirements, so you’ll need to hire a contractor who has experience working on them.
One important component of a heat pump water heater is the expansion tank. Water expands as it heats, which can increase pressure inside a closed plumbing system. An expansion tank gives that extra volume somewhere to go, which helps prevent damage to your water heater or plumbing system.
Heat pump water heaters also run on electricity, so the installation may require new electrical wiring or other upgrades to provide the proper power supply. Permits and other installation requirements may be necessary as well.