I have used a 120 gallon propane tank for my expansion tank for 4 years. I found a few bladder tanks and I want to switch over. I have a 1/2 inch copper line running to the bottom of my current tank. The new bladder tanks have connections on the top which I find kind of strange.
I want to be able to bleed air from the line going to the top of new bladder tanks. What is the best method or valve to use to the top of bladder tanks?
Does the height of bladder tank matter?
Should I just place on floor or can the be elevated on a rack?
Old tank below with new bladder tanks following.
![Bladder expansion tank connections? Bladder expansion tank connections?](https://www.hearth.com/talk/data/attachments/140/140339-c69e367549d29b5ded60debd335ebef6.jpg)
I want to be able to bleed air from the line going to the top of new bladder tanks. What is the best method or valve to use to the top of bladder tanks?
Does the height of bladder tank matter?
Should I just place on floor or can the be elevated on a rack?
Old tank below with new bladder tanks following.
![Bladder expansion tank connections? Bladder expansion tank connections?](https://www.hearth.com/talk/data/attachments/140/140332-aaaef7d3c25106cf874a0fe196e4e4ba.jpg)
![Bladder expansion tank connections? Bladder expansion tank connections?](https://www.hearth.com/talk/data/attachments/140/140337-3fd1b5fbce1f2d28c8c9f7406b6e64e3.jpg)
![Bladder expansion tank connections? Bladder expansion tank connections?](https://www.hearth.com/talk/data/attachments/140/140339-c69e367549d29b5ded60debd335ebef6.jpg)
![Bladder expansion tank connections? Bladder expansion tank connections?](https://www.hearth.com/talk/data/attachments/140/140337-3fd1b5fbce1f2d28c8c9f7406b6e64e3.jpg)
![Bladder expansion tank connections? Bladder expansion tank connections?](https://www.hearth.com/talk/data/attachments/140/140339-c69e367549d29b5ded60debd335ebef6.jpg)