This is a triple diaphram, poly pump with a regulator. The BLEACH BEAST is a gentle, but mighty beast. You will have to control it's power and might to avoid death and destruction! (as with any tool) Pair it with NAPWO's ECO WASHHOUSE AND ROOF WASH and some sodium hypochlorite, and you have a monster combo!
Jeff, that's a fair question. One I can never answer. Too many variables to get it correct. What I am saying is if you put 12% through it it will handle it. I like to see bleach strengths on siding at about 1.5% and roofs at 3%. But I will say this - What is currently being pumped by guys doing soft washing and roof cleaning with the pumps currently being used, will easily be handled by this pump, and the BLEACH BEAST will hold up as longer or longer. Pump has been in market at least three years. While this pump, pumps 9 gpm, and because of the way the bypass is set-up, you only get about 6.5 gals at your spray wand. Any tip can be used you desire for size. Pump pressure won't go over 150 PSI.
This unit does have a 24 month parts warranty.