ZD131-C 3v Universal Gas Water Heater Solenoid Valve General Gas Water heater Accessories 1.ZD131C is a C-class valve that can be directly replaced with a Class B valve ZD131B. You can also replace ZD131-A As long as the size of the same as with the voltage can be used 2.Please buy their own gas stove before the two batteries are all replaced by a new battery (whether it can play all the new spark sparks) If you still only ignite the ventilation and then consider buying a solenoid valve *NOTE:Pay attention to the time to buy attention to see the screw eye is not the same with your use to buy!