1/4″ Vinyl Micro Tubing


1/4″ Vinyl Micro Tubing

1/4″ Vinyl Micro Tubing

DIG’s 1/4″ (.156 ID x .245 OD) commercial-grade Vinyl Micro Tubing is available in black or brown and in coil lengths of 50′, 100′ and 500′. Made of high quality vinyl, the micro tubing is flexible and relatively soft. It is manufactured with an antioxidant and contains a minimum of 2% concentrated Carbon Black to protect the finished product from thermal degradation. The vinyl micro tubing is used in a wide range of drip irrigation applications, including as feeder lines from the 1/2″ drip tubing to extend drip emitters or micro sprinklers to the plants, as extensions from the 4-, 6- and 12-outlet drip manifolds or as the supply line for a complete 1/4″ drip system.


  • Available in 50′, 100’ and 500′ coils
  • Contains a minimum of 2% concentrated Carbon Black and an antioxidant to protect the drip tubing from thermal degradation
  • Use with 1/4″ barbed fittings
  • Softer, more flexible and easier to use than poly micro tubing
  • Meets the demand of micro irrigation systems for above- or below-ground layouts in agricultural, landscape and residential gardening installations
  • Interchangeable with other manufacturers’ brands of the same OD size micro tubing
  • Available in black or brown colors


How to Order
B38 50 ft. of 1/4 in. Vinyl Micro Tubing
B38100 100 ft. of 1/4 in. Vinyl Micro Tubing
B38100B 100 ft. of 1/4 in. Vinyl Micro Tubing


  • Operating pressure: up to 60 PSI
  • Available coils lengths: 50', 100' and 500’ coils in black and 100’ in brown
  • Bending radius: 10"
  • Color: black or brown
  • Size: 1/4", 156 ID x .245 OD (.50 wall thickness)
  • Material: vinyl with a minimum of 2% Carbon Black

Micro tubing friction loss chart in PSI per 50' length

c3 Flow cx c2 1/8" vinyl with .118 ID cx c2 1/4" vinyl with .156 ID cx c2 1/4" poly with .170 ID cx cx
GPM GPH L/H velocity f/s head loss in PSI velocity f/s head loss in PSI velocity f/s head loss in PSI
0.05 3.0 11.4 1.47 3.1 0.84 0.8 0.71 0.5
0.10 6.0 22.7 2.94 11.2 1.68 2.9 1.41 1.9
0.15 9.0 34.1 4.40 23.6 2.52 6.1 2.12 4.0
0.20 12.0 45.4 N/R N/R 3.36 10.3 2.83 6.8
0.25 15.0 56.8 N/R N/R 4.2 15.6 3.54 10.3
0.30 18.0 68.1 N/R N/R 5.4 21.9 4.24 14.4
0.40 24.0 90.8 N/R N/R N/R N/R N/R N/R
N/R: Not Recommended C=140
  • Demonstration Connecting a PC Drip Emitter to 1/4" Micro Tubing


The 1/4″ Vinyl Micro Tubing is used as the feeder line from the 1/2″ drip tubing to the plant area or plant locations. At the end of the 1/4″ micro tubing a drip emitter, micro sprayer, 1/4” drip line or micro sprinkler can be added. Like the 1/4″ poly micro tubing, the vinyl micro tubing is suitable for any commercial or residential application. The 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 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 tubing as a feeder line:

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

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

  1. Connect the 1/4” vinyl micro 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 that will be irrigated.
  3. Near each plant or container, cut the micro tubing and install a 1/4” tee (#H82A) or in-line drip emitter (#WL110B).
  4. Connect another piece of 1/4” micro 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 drip emitter or other emission device at the end of the micro tubing.
  6. Secure the drip emitter in place by installing a stabilizer stake (#P33B or P35B) to the micro tubing next to the drip emitter.

Note: It is not recommended to use the Vinyl Micro Tubing in high temperatures at pressures above 25 PSI. At high temperatures and pressures, the micro tubing may become disconnected from the fittings.