Adjustable Sprayer on Stake


Adjustable Sprayer on Stake

Adjustable Sprayer on Stake

DIG’s Adjustable Spray Pattern Micro Sprayers incorporate a vortex mechanism that offers an unusual configuration of a large water passage, a 360° spray pattern and an adjustable cap combined with a 6” stake and 1/4” barb. Available with a full-circle pattern only, these micro sprayers have an adjustable flow feature from 0 to 18 GPH and a diameter from 0 to 10’ at 25 PSI. The available models include 410B with a pack of 3, 410PRO with a pack of 25, and ASD-1B with a pack of 1. The micro sprayers have an adjustable cap that allows for simultaneous control of the flow rate and the wetting area. Used in residential gardens for planter boxes, large pots, flowerbeds, groundcovers, shrubs and trees, the low-precipitation-rate adjustable micro sprayers offer a convenient way to water areas where drip emitters or conventional sprinkler systems are not workable.


  • Available in a 360° spray pattern for individual plants or closely spaced plantings
  • Recommended for planter boxes, large pots, flowerbeds, groundcovers and shrubs
  • Rotation of the cap allows control of flow and the diameter of throw
  • Adjustment via a ratchet mechanism on the cap and a notch on the base allows for control of flow and pattern depending on plant requirements, down to a complete shut-off
  • Can be extended with 1/4″ micro tubing or connected into 1/2″ drip tubing
  • Complete unit includes a 6″ stake and 1/4” barb with an extra barb for the micro tubing
  • Efficient and reliable method for applying water
  • Trouble-free operation with no moving parts
  • Low flow with gentle umbrella pattern
  • Removable cap for easy cleaning
  • Constructed of UV-resistant, durable plastic material


How to Order
410B Adjustable Sprayer on a Stake (Pack of 3)
410PRO Adjustable Sprayer on a Stake (pack of 25)
AMS-1B Adjustable Vortex Micro Sprayer Assembly on 13" Clip Stake w/ 12" PE Riser & Barb


  • Operating pressure range: 15 to 30 PSI
  • Recommended operating pressure: 25 PSI (use with model D46 25-PSI pressure regulator)
  • Flow rate: 0 to 20 GPH with approximately 14 clicks
  • Pattern: 360° spray pattern
  • Wetting area: 0 to 11.5’
  • Filter requirement: minimum of 120 mesh
  • Recommended spacing: 4' to 5' apart when completely open
  • Material:
    • Stake: polypropylene
    • Micro sprinkler: high-impact plastic

Adjustable flow rate and diameter

Pressure Spray Flow rate diameter
PSI spray base GPH 360°
15 Black 0-14 0-5.6'
20 Black 0-17 0-7.8'
25 Black 0-18 0-10'
25 Black 0-20 0-11.5'
*Coverage is based on 5" above ground

Maximum number of micro sprayers on 1/2" drip tubing with .600 ID

Micro sprayer spacing 4' 5' 6' 7' 8'
Flow rate @ 25 PSI 11.5 11.5 11.5 11.5 11.5
Maximum length 76' 90' 102' 112' 128'
Flow rate in GPM 3.64 3.45 3.26 3.07 3.07
Flow rate in GPH 218.5 207 195.5 184 184
# of adjustable micro sprayers 19 18 17 16 16
Head loss in PSI 4.8 5.2 5.3 5.2 5.9
Velocity (f/s) 4.13 3.92 3.70 3.49 3.49
48" micro tubing head loss in PSI 0.5 0.5 0.5 0.5 0.5
Total head loss at the spray head 5.3 5.7 5.8 5.7 6.4
**This information is based on the cap being completely open to the maximum flow
  • Demonstration Connecting a Micro Sprayer to .700 Poly Tubing


The 410 Adjustable Micro Sprayers are available with a full-circle spray pattern and a rotating cap that allows adjustment of the flow from 0 to 20 GPH at 30 PSI using approximately 14 clicks to full flow and diameter. The notch action between the adjustable cap and the base allows a decrease or increase of the wetting area from 0 to 11.5’. Each micro sprayer comes in a one-piece construction that includes a 6” stake with a barb, rotating cap and an additional 1/4” barb to connect the micro tubing to the drip tubing. Use these micro sprayers where overhead watering is suggested on any type of planting, including vegetation that requires moisture, groundcovers, flowerbeds, individual trees along the poly tubing or for planter boxes and large pots.

For complete coverage of an area, the recommended spacing is 4’ to 5’ between each spray head or one per tree to a maximum distance of 128’ in length when the flow cap is completely open, using 1/2” drip tubing as the main lateral. Like micro sprinklers, these micro sprayers operate at low pressure and require a filter to protect the small orifice of the adjustable sprayer from clogging. The main advantages of the adjustable micro sprayers are a small size that can fit in most areas, lack of moving parts and the capability to adjust the flow and change the wetting area.

Micro sprayers offer an efficient and reliable method to apply water. To cover densely planted areas, place the micro sprayers close together in rectangular or triangular spacing for good overlapping irrigation and better uniformity. Do not use the micro sprayers in windy areas as the their small-sized droplets can be easily dispersed in the air, even under low to moderate wind conditions, adversely affecting uniformity. The main advantage of low-flow micro irrigation is that a relatively large number of micro sprayers can operate simultaneously with a small size pipe.

Installation suggestions

Basic installation recommendations for this product include first reviewing the area and then making a drawing of the garden or site with your preferred layout.
If automation is required, use one of DIG’s hose end timers or battery operated controllers. The ideal controller should have flexible scheduling and two to four start times per day for added flexibility.
Start the installation from a PVC pipe or to pipe thread

  1. If the system installation is started from a PVC pipe, first shut off the main water supply.
  2. If an automated system is preferred, we recommend installing a 3/4” ball valve or gate valve before the battery operated controller or AC valve, if used. This ball valve can be very useful as an emergency backup to turn the system off. This type of arrangement is used by professional installers.
  3. Turn the water supply on to flush the line and then shut the water supply off using the new ball or gate valve.
  4. Install an AC valve or battery operated controller, wrapping TEFLON tape on all the male thread fittings used.
  5. Turn the water supply on again to pressurize the system. The unit will open momentarily and then will shut off.
  6. Test the valve or the battery operated controller and make sure that it is working correctly. If using a battery operated controller, program it.
  7. After the AC valve or battery operated controller, add a 3/4” screen filter with 155-mesh (model D55). The screen filter is used to protect the drip system. Next, add a preset 25 PSI pressure regulator (model D46P) or adjustable pressure regulator (model PRV075). The pressure regulator is used to lower the pressure to the suggested operating pressure for a drip system. Follow with a 3/4” swivel adapter (model 50001) to the drip tubing or 3/4” PVC thread x slip adapter to the PVC line.

Start the installation from a faucet or hose thread

  1. If an automated system is preferred, install a hose end timer.
  2. Test the hose end timer and make sure that it is working correctly, then program it. To the hose end timer, add a backflow device (model D45), then a 25 PSI pressure regulator (model D46) and follow with a 3/4″ swivel adapter with a screen (model C34). If water quality is a concern, we highly recommend using a fine mesh 3/4″ filter with 155-mesh (model D57A).

Product installation

  1. Using the drip tubing as the main lateral or as a sub lateral, lay out the drip tubing per your layout drawing. Secure the drip tubing to the ground using stakes (model R60). Use the stake holders to secure the drip tubing to the ground in key areas and add more stakes as you unroll the drip tubing. Add stakes every 20′-30’ and at the end of each section, or as needed. An extra 1% of drip tubing length should be added to each lateral to compensate for contraction at low temperature.
  2. Throughout the installation and per your drawing layout, add, if needed, 1/2” fittings, such as tees (model C35) and elbows (model C36), leaving the end of the drip tubing open. To install the 1/2″ compression drip fittings, cut the drip tubing with a hand pruner, being careful to keep dirt from entering the line. Hold the fitting in one hand and the drip tubing in the other and force the drip tubing into the compression fitting by wiggling it from side to side.
  3. The adjustable micro sprayers are installed along the drip tubing at varying or at specific intervals. The distribution uniformity of water from the micro sprayers along the line depends on the incoming pressure, number of micro sprayers used per lateral and the length of the laterals. Special care should be taken to ensure high uniformity of water along the laterals by not exceeding the product recommendations (see chart).
  4. To install the micro sprayers, cut a length of two to four feet of 1/4” micro tubing (not to exceed four feet) (vinyl – models B38 for 50’ and B38100 for 100’, or poly – models B38P for 50’ and B38100B for 100’). To the micro tubing end, insert the extra barb included with the sprayer or a 1/4” barb (models H80A for pack of 10 and H80B for pack of 50). To the other end of the micro tubing, insert the micro sprayer barb and Insert the stake to the ground, keeping the micro sprayer head at a minimum of four to five inches above ground for best coverage. Punch a hole into the drip tubing using the small punch (model D44) or the gun punch (model 16-035), and snap the 1/4” barb at the end of the micro tubing into the drip tubing.
  5. Turn the water on and flush the line.
  6. Close the end of the drip tubing using the hose end (model Q58) or figure “8” (model F68B).
  7. Pressure-test the system to identify leaks in the drip tubing laterals, fittings and micro tubing, and then program the hose end timer or battery operated controller.