flood nozzle size?

Discussion in 'Pesticide & Herbicide Application' started by bradyard, Jan 14, 2009.

  1. bradyard

    bradyard LawnSite Member
    Messages: 6

    What is most common size for lawn spraying? 2gpm, 3gpm, 4gpm?
  2. Grandview

    Grandview LawnSite Gold Member
    from WI
    Messages: 3,251

    I use .5 if I use them.
  3. Grassmechanic

    Grassmechanic LawnSite Silver Member
    Messages: 2,697

    I use a 2 gpm for most apps.
  4. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,659

    I apply about 3 gallons per minute. But...I use the white 4 gallon per minute nozzle. Because I get bigger droplets and less drift. Wind is seldom a problem.

    But your actual gallonage per 1000 sq ft will depend on the walking speed, swath width, pump output, hose size and hose length. A 4 gal per min nozzle will not put out 4 gallons if pressure is low. And it will put out about 6 gallons if at 200 pounds pressure. Do a bucket check. Calibrate carefully.
    The gallons output you need depends on what you are trying to do. If you melt urea or use liquid fert--you need more water as a carrier. Some insect controls need plenty of water. Pre-emergents likewise. If not, or only doing weed control, less water is fine.
    Last edited: Jan 15, 2009
  5. azjojo99

    azjojo99 LawnSite Member
    from S.C.
    Messages: 70

    I use the 3 gpm nozzle calibrated to my walking speed to give ~2.3 gallons/1000 ft^2, or 100 gallons/acre.
  6. whoopassonthebluegrass

    whoopassonthebluegrass LawnSite Platinum Member
    Messages: 4,305

    Riggle: does this nozzle happen to let the debris through that would normally clog a 2gpm nozzle?
  7. LawnTamer

    LawnTamer LawnSite Gold Member
    Messages: 3,986

    I use a 2gpm on my skid sprayer. I keep thinking I should switch up to a 3gpm and walk faster, but I am too dang old.:laugh:
  8. heritage

    heritage LawnSite Bronze Member
    Messages: 1,351

    With the 1/2 hose I like the 2GPM nozzle.

    With the 3/8 hose I like the 1.5 GPM nozzle. I use 100 mesh screen in the suction filter with this nozzle to keep the small holes sediment free.

  9. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,659

    Whoop, I clean my nozzle about once per day. So I would say a lot of debris must go through. And I have a 325 mesh filter before the pump. Plus I have a 8 inch diameter fiberglass window screen filter glued to the inside of the tank near the outlet. Used silicone and more recently "Gorilla Glue". (Waterproof, but wear Gloves!) I melt urea--so I have a lot of foreign material to scoop out at the end of the year.
  10. whoopassonthebluegrass

    whoopassonthebluegrass LawnSite Platinum Member
    Messages: 4,305

    Thanks for the info. I'll have to do some of that myself. I've just developed the habit of carrying a small wire brush as I go along and unscrewing/brushing/rinsing the nozzle when it gets bad. And while that only takes an extra 20 seconds, when I get a dirty batch of fertilizer - I'm doing that on every single lawn one or more times...

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