Since I first had the Bulldog tank, I have had problems at fields getting it filled because it would leak out of the fill nipple. I have had the fill nipple replaced 2 times and have only had the tank filled about 8 or 9 times. When the tank did work it had some consistancy problems. Overall I have had more bad luck with this tank than I have had good luck.
I do not recommend this nitrogen tank. I have had many problems with getting the tank filled and also the consistancy when the tank was working.