Yes, an experienced plumber or drain technician can use a hydro jetter as an effective way to flush out tree roots. But it only sometimes works. Tree roots can cause severe blockages and damage underground sewer lines if they invade the pipes. Hydro jetting can penetrate and break apart the roots, removing the obstruction and preventing further root intrusion into your pipes. Hydro jetting can produce impressive pressures of up to 4,000 PSI.
Tree roots can grow very thick, and hydro jetting tends to be more effective on newer tree roots that are thinner and have had less time to develop. Thicker tree roots are unlikely to be broken up by sheer water pressure, even at 4,000 PSI.
It's important to note that hydro jetting works best when most of the pipe remains intact. If the sewer or drain pipe is already damaged, the pressure of the hydro jet can cause further harm, meaning that you may need to replace more of it. Additionally, some pipes, such as thin PVC, cannot withstand hydro jetting, even if they are in good working condition.