I bought a 88ci 5000psi tank. When I filled it to 4500psi it was all good. I played a few games and went to refill. I thought I will try to go to 5000 this time. When I was done filling and the air guy went to dump the air still left in the hose it bleed my tank all the way down to 0psi. I figued it was the fill nipple and bought a new one no biggie. I the went to fill my tank to 4500psi (thinking maby it could not handle 5000psi). After the guy filled my tank it was all good. I played afew more games and then tried to refill again. I went to 4500psi the air guy dumped the air in the hose fine but when I disconnected the hose from my tank the fill nipple was leaking.. So do I try one more fill nipple to see if I just got stuck with to bad ones or do I return the tank and get a new one. All so I have a tourney this weekend and need the 88ci 4500psi (my other tank is 68 3000). Please help me.