In the most basic sense, you need pressure and flow to jet a sewer line. The pressure is your cutting ability and the flow is your flushing ability.“You need both, but generally you take whatever kind of pressure you need to clean the pipeline and you add flow to it and that will speed up the process,” says Andy Whitehead of American Jetter.But finding the right balance between the two can be a little more nuanced, and several different factors come into play.HOSE SIZESay you have a machine that produces 40 gpm at 2,000 psi. Just because the gauge reads
