Yes, the Chapin Pro Series 4 Gallon Backpack (#61800) can be used for different product applications. It would be recommended to either triple rinse the sprayer or use a spray tank cleaner between products.
Per the manufacturer of the Chapin Pro Series 4 Gallon Backpack, the straps are adjustable for a custom fit.
Yes, the Chapin Pro Series 4 gallon backpack sprayer is a very good option for precision spraying. There are different tip sizes available, such as pin stream, fan, fine mist and coarse stream, to give you the best and most accurate spray depending on what you are wanting to do. There is also an internal 4 position spray valve allows for expert pressure control from 15psi to 60 psi.
No, a paver sealer cannot be used inside of a Chapin Pro Series 4 Gallon Backpack. You may want to contact Chapin directly for advice on which sprayer would be suitable for applying the specific product you have. You can reach them at 800-950-4458.
