Power Washing and Roof Cleaning Forum

Jeff Thompson · Approved Exterior Cleaner

Whisper 36" surface cleaner

Fred W · Guru

Jeff, I think your issue is more on the volume side. Maybe Eric will chime in but from everything I see out there you really need the GPM to get the faster cleaning done.

If you mix an 8 GPM with a 4 nozzle surface cleaner you can really move around. Not speaking from experience but from research as I'm looking at a purchase as well.

Jeff Thompson · Approved Exterior Cleaner

Thats exactly what I started thinking while out in the garage Doug. I'm on the low end with a 5.5 gpm machine whereas if I was on the higher end it would push the spray bar faster.

Michael Wedge · Approved Exterior Cleaner

Aloha Jeff, the formula for surface cleaners is 4" for every GPM. Your 5.5 will be maxed out with a 24" surface cleaner. I would Consider a 20" whisper wash classic with a 4 nozzle bar from Russ Johnson at Southside Equipment. You should be able to run wide open with that, especially if you pre and post treat.

Jeff Thompson · Approved Exterior Cleaner

Thanks Mike for that formula. So I have a 20" already (and it!s from Russ). So I'm maxed out and good to go.

Greg Nash · Member

36 is way to big for 5.5 gpm

Jeff Thompson · Approved Exterior Cleaner

Thanks for the info guys. I'm just glad I came across that review and decided to look into it deeper. Would have hated to spend that kind of money on something that wouldn't work like I expected.

Fred W · Guru

We rent machines every now and then when we have larger jobs and I find the rental machines don't do a good job most of the time. Next time I need to look at the GPM's.