Q. Do I need to pour hot water over the indicator every time I use it?
A. Yes

Q. Does the indicator only work with hot water?
A. In most climatic conditions the answer is yes, however in extremely hot conditions it may be necessary to use cold water.

Q. Does my gas appliance need to be operating for me to get a reading from the indicator?
A. No, this is not necessary but if the appliance is working you will probably obtain a faster result.

Q. Does the condition of my tank affect the working of the indicator?
A. As long as the tank surface behind the indicator is clean any tank should provide an accurate reading. It is important to ensure that the entire area of the indicator is adhering to the tank surface without air bubbles or gaps behind it.

Q. How long will my indicator last?
A. The indicators are long lasting