[Por_sha911]

Being in the attic I would guess it has never been flushed.

The average life expectancy of a newer residential grade tank is 7-10 years (I can say this with confidence because I work for a business that deals with warranties). Like appliances, the efficiency of water heaters has improved but the life expectancy has dropped.

Having a sensor is a good thing but sometimes the tank doesn't 'start to leak' but just totally lets go without warning and you will have a waterfall coming through the ceiling. Because of the location, I suggest you replace it so that you will sleep well at night.

I have seen setups where a float inside the pan will activate the shutoff valve feeding water to the tank. I have no idea of the cost but I imagine it would be high.