Can anyone solve this mystery for me? When it comes to putting a 2 gallon thermal expansion tank on a hot water heater, can a person opt to use a 2 gallon well pressure expansion tank?

What is the difference between these expansion tanks?

I will use the following example that Lowes sells the 2 gallon hot water tank expansion tank for $40.00 and the 2 Gallon well pump expansion tank for $50.00. These are the "LPT2" series tanks.

I wonder if most people complain that typical hot water expansion tanks experience bladder failure in 3 years? Do you think that the well style expansion tank has a stronger internal bladder and will last longer?