I ordered this pressure tank to replace my existing tank that had the bladder fail after 20 years of use. It was an exact replacement, as my old one was the same model. It took longer to drain the water out than to actually change the tank. Shipping was very fast, it arrived in two days!
From previous experience, my last Wellmate WM9 tank lasted 19 years. The decision to purchase a new one rather than repair the old just for the sake of the cost.