I asked a friend to check out some pumps for me. First the hand pump which has no psi reading how many psi will it go up to.

Then my pal found a electric pump, on the psi guage it reads up to 250psi, dont know if the pump can take it? How high should i go.

Can a steel AG take that kind of pressure, cuz its just threaded with thread tape. No soldering and stuff. Hope there are no leaks at that kind of pressure.