Micro Sprinkler on Spike


Micro Sprinkler on Spike

Micro Sprinkler on Spike

DIG’s 8855-1GB (in packs of 1) and 8855-5GB (in packs of 5) are 360° Micro Sprinklers with a double-frame design, completely assembled with a 13″ spike, 24″ micro tubing and a barb. The micro sprinklers’ spinner/rotor is balanced between the micro sprinklers’ double frame and the nozzle, providing gentle and consistent uniformity over a wide area of up to 25’ in diameter. They are a great choice for watering flowerbeds, groundcovers, vegetable gardens and under tree canopies. The micro sprinklers are pre-assembled with a spinner for 360° of coverage, and interchangeable spreader insert heads are included in the package for 90°, 180° and strip patterns.


  • Recommended for vegetable gardens, seedlings, flowerbeds, groundcovers and under tree canopies,
  • The spinner/rotor can be replaced with a 90°, 180° or strip-spray-pattern spreader for a range of applications
  • Double-frame design provides balanced coverage with high uniformity
  • Low flow rate
  • Easy to dismantle, clean and assemble
  • Press-fit configuration for easy maintenance
  • No misting
  • The spinner/rotor is balanced between the micro sprinkler’s double frame and the nozzle, providing gentle and even uniformity
  • Strong propulsion of the spinner/rotor at low pressure for even uniformity
  • Available completely assembled on a 13″ spike with 24” (.160 ID x .270 OD) micro tubing and a barb
  • Excellent performance with uniform water distribution
  • Large water passage


How to Order
8855-1GB Micro Sprinkler on Spike Complete Assembly with 360° (pack of 1)
8855-5GB Micro Sprinkler on Spike Complete Assembly with 360 degree (pack of 5)


  • Operating pressure range: 15 to 30 PSI
  • Recommended operating pressure: 25 PSI (use with model D46 25-PSI pressure regulator)
  • Flow rate: 18.3 GPH @ 25 PSI
  • Pattern: 360° with interchangeable spreader insert heads for 90°, 180° and strip patterns
  • Diameter or radius of coverage @ 25 PSI:
    • 360° spinner/rotor, up to 25’ in diameter
    • Blue 90° spreader insert, up to 10’ radius
    • Red 180° spreader insert, up to 5.1’ radius
    • Black strip spreader with 30° x 2 insert, up to 7.5’ radius
  • Color code: green
  • Available models: 8855-1GB in packs of 1 and 8855-5GB in packs of 5
  • Micro tubing length & size: 24" x 1/4" with .160 ID x .270 OD
  • Filter requirement: minimum of 120 mesh
  • Recommended micro sprinkler spacing: 11' to 15' apart with 360°
  • Material:
    • Stake: polypropylene
    • Micro sprinkler: high-impact plastic

Flow rate, radius and diameter

Pressure Spray Flow rate c2 Radius cx Diameter Diameter
PSI base GPH 90° 180° 30° x 2 360°
15 Green .047" 14.0 9.6' 4.3' 7.4' 21.2
20 Green .047" 16.3 9.8' 5.0' 7.5' 22.8
25 Green .047" 18.8 10.0' 5.1' 7.5' 25.0
30 Green .047" 20.1 10.0' 5.3' 7.6' 26.6

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

Micro sprayer spacing 11' 12' 13' 14 15'
Flow rate @ 25 PSI 18.3 18.3 18.3 18.3 18.3
Maximum length 110' 120' 130' 126' 135'
Flow rate in GPM 3.05 3.05 3.05 2.75 2.75
Flow rate in GPH 183 183 183 164.7 164.7
# of mini sprinklers 10 10 10 9 9
Head loss in PSI 5.0 5.5 6.0 4.8 5.1
Velocity (f/s) 3.46 3.46 3.46 3.12 3.12
24" micro tubing head loss in PSI 0.6 0.6 0.6 0.6 0.6
Total head loss at the micro sprinkler 5.6 6.1 6.6 5.4 5.7
*Coverage based on a minimum 8" above ground
  • Demonstration Connecting a Micro Sprayer to .700 Poly Tubing


The 8855-1GB and 8855-5GB Micro Sprinklers on Stakes are available in a complete assembly configuration with a 13” stake and 24” micro tubing with a barb. They are recommended for flowerbeds, vegetable gardens, seedlings, groundcovers and under tree canopies. The ideal spacing is 11’ to 15’ between the micro sprinklers to a maximum distance of 135’ in length, with 1/2” drip tubing used as the main lateral. Included in each package are interchangeable spreader inserts to reduce the coverage to half, quarter circle or strip pattern. The flow rate is 18.3 GPH at 25 PSI with coverage of up to 25’ full circle, or a 10’ radius, depending on the assembly of spreader inserts used and the height of the micro sprinkler.

The micro sprinkler design has the spinner/rotor mounted between the double bridge and the nozzle. The spinner/rotor can be changed by turning the nozzle assembly clock wise and removing the nozzle and the spinner/rotor.
The micro sprinkler on a stake operates with low flow at relatively low pressure compared to conventional sprinkler systems. Low-flow overhead irrigation with a low application rate can be used for areas where drip emitters are not practical, for keeping plant foliage constantly moist or when overhead watering is required. The micro sprinklers apply water to the surface area at a very light precipitation rate and at low tension to the soil, allowing the water to dissipate in a wetted profile that provides high uniformity. One of the main features of micro sprinkler irrigation is that it can prevent plant stress by maintaining low water tension in the soil, therefore leading to healthier plants, by using a low-flow application rate.

Installation suggestions

Basic installation recommendations for these products 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 options 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 micro irrigation 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 micro irrigation 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 micro/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 one of DIG’s hose end timers.
  2. Test the hose end timer and make sure that it is working correctly, and 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. Use the drip tubing as the main lateral or sub lateral and lay out the drip tubing per your layout. Secure the drip tubing to the ground using stakes (model R60). Use the stake holders to secure the drip tubing or drip line to the ground in key areas and add more stakes as you unroll the drip tubing. Add stakes every 10′-20’ 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 drip tubing 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 micro sprinklers or micro sprayers are installed along the drip tubing at varying or at specific intervals. The distribution uniformity of water from the micro sprinklers or micro sprayers along the line depends on the incoming pressure, number of micro sprinklers or micro sprayers used per lateral and lengths of the laterals. Special care should be taken to ensure high uniformity of water along the laterals by not exceeding the product recommendations. To install a micro sprinkler, 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. The micro sprinkler should be elevated to a minimum of 8” above ground for best coverage.
  4. To replace the spinner/rotor with one of the 90°, 180° or strip pattern spreader inserts included in the package, review the following steps

Step 1: Turn the nozzle assembly with the micro tubing counter clockwise and remove the nozzle assembly and the spinner/rotor mounted between the double frame and the nozzle assembly
Step 2: Insert one of the spreader inserts with the pin forced to the location on the double frame housing. Move the spreader insert into position by turning it left or right
Step 3: Insert the nozzle assembly with the micro tubing and turn it clockwise to lock

  1. Turn the water on and flush the line.
  2. Close the end of the drip tubing using the hose end (model Q58) or figure “8” (model F68B).
  3. Pressure-test the system to identify leaks in the drip tubing laterals, fittings and barb connections. Make sure that all the micro sprinklers are standing in a vertical position and operating with good uniformity, and then program the hose end timer or battery operated controller.