I run mine most often at 350 psi but it works fine at average to strong tap pressure (70-100 psi) and I have run it at 600 psi. not sure if that answers your question, but I couldn't understand what you asked. The cleaning is mostly done with the beating metal swoop heads, the water jets are just for flushing. That is to say, the 360i cleans the same with very low to very high pressure, the sweet spot for me is in the 300 range for most carpets.