I was wondering everyones opinion on gas engines instead of 12v, I was at an auction and came into possesion a skid chlorine sprayer. I am just expanding into roofs and wondered if this would work well for spraying roofs with chemical. Thanks for the info.
Rinse it out really well after each job, (10-15) gallons of water. Haul an extra tank just for rinsing if need be,...and you have room. I use cast iron roller pumps, but with proper rinsing they actually last quite a while. I'm only on my second one for tthe season, at 3-4 roofs per week. Rinsing with ENOUGH water is key.
I had used the Yamada NDP-15, but I didn't like the way it sprayed near as well as the roller pumps.