Age of semen tanks

[lightnin4]

Wanting opinions on how long you should keep a semen tank before you think about replacing it.

 

[Bulldaddy]

I watch the holding time on the tank more than the age.  When you have to start refilling it twice as often then it is time to replace the tank.  If a tank just sits in the barn it will last a lot longer than one that bounces around in the back of a pickup.

 

[tj1993]

R there any early signs that a tank is going to fail?  I have heard they will get frost around the neck a day or so before failing completely.  At least you could try to move the semen to another tank....