Barb - Poly to drip
Barb - Poly to drip

Barb - Poly to drip

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Your Price: $0.99
This is the transition piece from standard poly tubing to the drip tape. These are inserted 'barb' end (top of picture) into punctured poly tubing. Then a length of drip tape is slipped onto the larger end of this plastic piece (bottom of picture) which is secured by spinning the ring (middle of picture) until tightened firmly by hand. One barb is needed for each section of drip tape extending off the poly tubing. See below for project calculation hints.
Item#: GS-IR-Barb
Availability: In stock.
Sold as = by Single piece.
Poly to Drip Tape attachment Barb.

These are inserted 'barb' end (pointy) into poly tubing. Then a length of drip tape is slipped onto the larger end of this plastic piece which is secured by spinning the ring and hand tightened.
One of these barbs is needed for each section of drip tape extending off the poly tubing. 

How to calculate quantity of barbs needed for typical gardens with lines of drip tape spaced 1 foot apart:
  • Measure area to be watered.           Example: With two gardens... one 4ft x 10 ft., the other 3ft x 9ft. 
  • Add total feet of smaller sides.                       4 feet +3 feet = 7
  • Reduce by 1 per garden area.                           two gardens, means reduce by 2... 7-2= 5
  • Answer is total barbs needed.                         =  5 barbs minimum
Pro Tip: Don't do the reduction step and keep those two left over barbs as handy extras just in case.   (2 extras as spares)
SMALL holes can be easily punched into the poly tube with a special tool found in the irrigation section of your hardware stores.
Be sure to check out the full Drip Tape description for a supply list and an installation video. 

For the above gardens, calculating the length of tape is as follows:
(width is shorter number, length is longer number for each bed)
  • Measure area to be watered.             Example: With two gardens... one 4ft x 10 ft., the other 3ft x 9ft. 
  • Reduce the widths by 1                                4 minus 1 = 3,  and 3 minus 1 = 2
      (Note these two new numbers added together is the number of lines: 3 + 2 = 5)

  • Extend lengths by 1                                     10 plus 1 = 11,  and 9 plus 1  =10
      (Note these two new numbers are the lengths of the tapes for each garden with extra for folding and securing the ends)

  • Multiply new widths by new lengths.          3 x 11 = 33 feet of tape for first garden, and 2 x 10 = 20 feet of tape for the second garden
  • Add new answers together.                         33 + 20 =  53 feet of drip tape for two gardens with lines spaced 1 ft apart.

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