This is a photo of my 2 gallon model ,prior to the re-construction phase. I also have a 4 gallon back pack model . I was thinking that it could be used at Rondys for a mobile smokepole cleaning business. Just filler up and go around camp flushing out smokepoles. Ought to be worth a couple bucks each. OK OK a little extreme, must be the entrepreneurial spirit kicking in. But in all honesty I am making one out of my 2 gallon sprayer.