Can you run a gas hot water heater without electricity?

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Also asked, do gas water heaters work when the power is out?

Most natural gas water heaters operate with a pilot light, heating water even when the electricity is out. And since they reheat water almost twice as fast as electric models, relying on a gas water heater for bathing during an outage continues to be economical.

Also, does a water heater need electricity to work? The short answer is, yes, a gas tankless water heater needs electricity to work. Most traditional tank systems also need electricity. If your pilot light is fired up by your power source then you need to be on the grid.

Similarly, will a gas tankless water heater work without electricity?

It may be obvious that electric powered tankless water heaters won't work without an electrical supply. However, natural gas and propane tankless water heaters rely on electricity as well, and won't work without electricity.

Can I flush the toilet if the power is out?

Waste removal systems are either gravity-based or rely on electricity to move the waste through the pipes and out into the sewer system. If your system is gravity-based, there shouldn't be a problem with flushing your toilet, unless the pipes freeze.