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Okay this is going to be an odd one. So, I’m relatively new to the pressure washing industry but have a decent entry level knowledge about most things pressure washing related. Until I started researching on the internet about pressure washing i honestly never realized how essential bleach (or SH whatever you prefer to say) is to a large percentage of pressure washing businesses. Here’s the catch, I’m actually allergic to bleach.. My parents found out when I was a kid because I started breaking out in hives and had other allergic reactions when in contact with bleach in anyway. Which is obviously unfortunate because I understand how much more timely efficient using bleach is versus just pressure from a pressure washer. I want to still continue my pressure washing business because i genuinely enjoy the work. I am just am going to have a take a different chemical approach that works for me. My question is, if I am relying more on the power washer rather than chemicals to wash a house should I still more concerned about GPM or PSI? I’ve heard many times GPM is king but isn’t that more for the rinsing and applying chemical aspect of it? Maybe not. But I’ve been stuck on this decision. I am looking at two machines. One is 4GPM 4000 psi, and the other is 5.5GPM 3000 psi. Which would be better for residential use only when using only the power washer and soap? I will be doing siding, decks, fences, driveways, sidewalks, but no roofs. Which do you guys think will get the job done faster in my situation? More PSI or more GPM? Thank you