Replacement rates for diesel tank filters greatly depend on the size and material of the filters in question, as well as the age of the tank or vehicle it is being attached to, among various other factors.
A small diesel tank filter system ought to be replaced on a semi-regular basis every two to three years. Larger filters can last several times that long while also requiring less maintenance. Generally speaking, fuel tank filters may need to be replaced more often if the machine or vehicle connected to it is an older model, in order to make up for natural wear-and-tear.
Different materials degrade at different rates. Our brass filters, for example, do not succumb to rust due to the lack of iron content, making them great for long-term sustainability.