I went 4x4 to 5.5x2500. Doing a driveway alone you won’t see a time advantage really. Do a whole house plus concrete and I knocked about 30-40 mins off. Here in S Texas the 5.5x2500 cleans residential concrete just fine for me with a pre and post if it’s really bad. I just went 7x3500 for more flow. The orifices I’m using I’m still not really Making more psi than I was with the 5.5. The difference in flow is night and day though.
Not crazy hard. I still do small back patios with mine if I dont want to start my other machine but if its super dirty itll take you more time and need a good pre and post treat
Typical just a house mix strength with my 5.5GPM. Probably 1-1.25% since I’m DS’s straight 12.5%. Occasionally I’ll need my roof system for a stronger post treat. Maybe 1 out of 15 jobs.
Yeah I was going to use 12v for roofs then just downstream my 12.5% for pre and post using my downstream off of my PW, surface cleaning inbetween but I’m getting a 6.8 so I’ll need to figure out how to get around 1%