1. Ryan Lightning

    Ryan Lightning LawnSite Senior Member
    from CA
    Messages: 554

    Does the psi on a backpack sprayer affect the volume of liquid you can put down? Like the SP1 (70psi) compaired to the SP2 (180 psi). If I wanted to use multiple tips to spray lawns, would I be much better off with more psi?
  2. In theory it takes more fluid to create more pressure.

    Do a test with plain water and a measuring cup, because on the little back packs they can make higher psi action with the same gpm.

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