I know I am overlooking some small well known fact , but why is bigger better? I know that if there wasn't a pressure relief valve (usually 2250?) that pressure would keep increasing and you would get more and more pressure, therefore 30 tons is better than 10 tons. But doesn't the relief valve dump preesure at 2250? then how do you build up to more tons. can anyone give me a better idea of how the relief valve works? I have some very hard wood that my splitter wouldn't split last October, It wont now either Its a tractor pto driven 540 rpms? It has a 3 to one gear settup so I'm spinning the pump 1620 times. I have thought of raising the relief pressure from whatever its at up 300 lbs. I bought a tee and 3000 lb gauge(to be put on). Are relief pressures easy to set and it is safe(main concern), Do you think the 300 lb increase will make the spliiter work better? Any suggestions are appreciated.