... with batteries/electricity 3.low pressure start Gas water heater, gas geyser, geyser, gas water geyser, hermetic water heater1. Flame Failure Protection; Over-heating ... protection; Low electricity protection3 Anti-wind flow back device; Anti-corrosion gas and water valve4 Full size reflector inside for better ... tin.Internal constructionburner and valves Heat exchanger flue type gas water heater