... gas water heater,gas boiler.gas geyser 2) Double ignition pin, automatic pulse ignitions gas boilerGas water heater, Gas ... convincing evidence1.Auto-cut-off protection: numerical control automatic ignition, the auto-cut-off protection will shut off gas ... .2.Water-controlled automatic ignition: the water-controlled automatic ignition is applied for the unit, double-ignition device with high rate, the ...