Originally Posted by COBEGO
Ok thanks. I've heard some talk about changing the burst disc to a 5k instead of a 7.5k. Is that necessary?
Yes if you are putting a 4500 psi reg on a 3000 psi bottle you need to change the high side burst disk from 7.5K to the 5K. This is so you don't accidently overpressurize the tank beyond the test limit.