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I have an inexpensive, gas-powered pressure washer that I love very much. Using it in conjunction with a foam canon, I save a gigantic amount of time, energy, and money washing my cars (my family has at least 5 of them).
But then I learned about hydrojetting and realized that I may never experience the joys of it. My 2.5 gpm and 2500 psi (max) pressure washer likely cannot cut through any sizable roots. However, buying a $6,000 (4,000 to 5,000 psi; 8 gpm) hydrojetting machine meant for commercial uses is just a bad idea. I'm not even sure if those hydrojetters can be set to safely wash cars. If I have to maintain two separate machines, buying even a $1,000 dollar hydrojetter is a bad use of money. Guess I have to stick with my pain-in-the-ass but sensibly priced electric auger(no real-maintenance required).
I have two questions for my pressure washer though.
1. If I bought a drain cleaning conversion/extension kit, could my pressure washer reliably knock out grease and indoor-biological materials?
2. If I have blocks just beyond the trap pipe(u-shaped pipe) of -say- bathtubs and sinks, would spraying pressurized water without extensions reliably do anything?