Developed using a proprietary blend of premium polyethylene-based resins, the MICRO-POLYFLEX™ micro tubing has better flexibility and is the most chemically resistant product offered by DIG. Used for drip irrigation, landscape irrigation, agriculture, and potable water service, MICRO-POLYFLEX™ tubing offers superior environmental stress cracking resistance. MICRO-POLYFLEX™ is available in black, brown, or white and it inhibits algae growth and UV degradation, making it a good choice for a wide range of outdoor applications.

Features & Applications

  • Supports emitter placement flexibility, and can be used with point source drip emitters, micro sprayers, or micro sprinklers
  • Fits all sizes of emission device inlet barbs and ¼” barbed fittings
  • Used for subsurface or surface residential and commercial landscape applications, including vines, shrubs, raise beds, greenhouses, and nursery
  • Designed for all low volume irrigation applications, indoor and outdoor, using cold water only
  • Improved flexibility and memory compared to standard LLDPE tubing
  • Performs well in cold and warmer climates
  • Short bending radius with less kinking than standard polyethylene micro tubing
  • Made from the highest quality linear low density poly resins
  • Excellent Ultra-Violet (UV) protection and environmental stress cracking resistance and burst strength
  • Available in 1/8” or 1/4” in black, brown, or white, in coil lengths of 50’ and 100’
  • White colored MICRO-POLYOFLEX™ tubing is opaque, preventing algae growth
  • White colored MICRO-POLYOFLEX™ tubing withstands heat and harsh chemical conditions while producing cooler water temperatures
  • Produced under high quality control standards
  • Made in the USA


How to Order
B38PBF 50’ ¼” MICROFLEX poly micro tubing with .170 ID x .250 OD, color brown
B38100PBF 100’ ¼” MICROFLEX poly micro tubing with .170 ID x .250 OD, color brown
B34P 1/8" BLACK POLY MICRO TUBING, 50' ROLL, .125" ID X .187" OD
B38100PF 1/4" BLACK POLYFLEX MICRO TUBING, .170" ID X .250" OD, 100'
B38PF 1/4" BLACK POLYFLEX MICRO TUBING, .170" ID X .250" OD, 50'


  • Operating pressure: up to 70 PSI
  • Available coils lengths: 50' and 100'
  • Recommended operating pressure: 15 to 30 PSI
  • Dimensions: 1/4", .170 ID x .250 OD
  • Color: black or brown
  • Material: proprietary blended polyethylene-based resins
  • Warranty period: 3 years

1/4" poly with .170 ID x .250 OD MICRO-POLYFLEX  friction loss

 GPM  GPH velocity f/s head loss in PSI   LPM   L/H velocity f/s head loss in PSI
0.05 3 0.71 1.07 0.189 11.36 0.71 0.074
0.1 6 1.41 3.86 0.379 22.71 1.41 0.266
0.15 9 2.12 8.16 0.568 34.07 2.12 0.563
0.2 12 2.83 13.9 0.757 45.42 2.83 0.958
0.25 15 3.54 21.01 0.946 56.78 3.54 1.455
0.3 18 4.24 29.43 1.14 68.1 4.24 2.029
0.4 24 5.6 50.11 1.51 90.8 5.6 3.455

How to use

About Micro-PolyFlex Micro Tubing 

DIG’s  1/4″ flex poly micro is a softer version of our poly micro tubing, and it is used as the feeder line from the 1/2″ drip tubing to the plant area or plant locations. At the end of the PolyFlex Micro Tubing, a drip emitter, micro sprayer, or 1/4” dripline can be added. Like the 1/2″ drip tubing, the PolyFlex Micro Tubing is suitable for any commercial or residential application, and it has a better bending radius than all other poly micro tubing. The PolyFlex Micro Tubing may be installed above the ground and covered with mulch to blend with the landscape or extended from the 1/2″ drip tubing and installed below the ground. The PolyFlex Micro Tubing may also be used as the sole supply line for a small complete system for containers and potted patio gardens.


Using the Micro-PolyFlex Tubing as a feeder line:

  1. To connect the MicroPolyFlex micro tubing to the 1/2″ drip tubing, first force a 1/4″ barb or 1/4″ tee (model H80A or H80B for barb and model H82A or H82B for 1/4″ tee) into the end of the MicroPolyFlex tubing, then use the tool punch (model DPT or D44) to make a hole in the ½” drip tubing.
  2. Insert the barb into the hole in the MicroPolyFlex tubing. Use the micro tubing as a feeder line to reach a plant or cluster of plants away from the drip tubing and install a drip emitter, micro sprinkler, or micro sprayer at the end of the MicroPolyFlex tubing.

Using the micro tubing as a basis for a complete system:

  1. Connect the 1/4” MicroPolyFlex tubing to the 1/4” hose thread adapter [model C37B] by forcing the end of the micro tubing into the compression side of the adapter while moving the tubing from side to side.
  2. Uncoil the micro tubing and lay it out adjacent to the plants to be irrigated.
  3. Near each plant or container, cut the tubing and install a 1/4” tee (#H82A) or in-line dripper (#WL110B).
  4. Connect another length of 1/4” MicroPolyFlex tubing to the side outlet of the 1/4″ tee and extend it out to the plant or container.
  5. Open the supply valve momentarily and flush out the line[s] and then install a dripper (or other emission device) at the end of the MicroPolyFlex micro-tubing.
  6. Secure the dripper in place by installing a stabilizer stake (#P39B) to the MicroPolyFlex tubing next to the dripper.