If you are using RO. or rain water , right now I am using a Black and Decker battery sprayer it holds 3 gal . a battery eater deluxe , they are not making them any more . I also have a submersible pump that is used to move rain water into trash cans with lids . it dumps a lot of water at a time . When the battery sprayer bites the dust does anyone know of another battery or electric sprayer that would work ? Thanks for any info . Gin