Tubing size
1/2 in drip tubing at .620-.630 in OD: fittings that list it
The smallest 1/2 in OD: Raindrip's .520 x .620 in pair and Rain Bird T63 at 0.63 in. Which compression, nut-lock and reducing fittings list it.
Also listed as .620 tubing, T63, 0.63 in tubing
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Short answer
This is the smallest of the three 1/2 in sizes. Raindrip lists a .520 x .620 in (ID x OD) pair for its Smart Loc coupling, and Rain Bird sells T63 at 0.63 in OD. DIG's green-insert compression fittings list .620-.630 in OD; Rain Bird's Easy-Fit range starts at 0.63 in. Measure before you buy: see how to measure drip tubing.
Key facts
- Names it is sold under
- 1/2 in tubing. Rain Bird sells it as T63 (0.63 in OD); Raindrip lists a .520 x .620 in size for its Smart Loc coupling[1][2]Raindrip's Smart Loc page prints no size label for the .520 x .620 in pair.
- Maker pressure rating
- Rain Bird: 70 psi for T63[1][3]Rain Bird gives one 70 psi rating for its T63, T70 and T71 family.
- Compression fittings for this OD
- DIG green-insert compression fittings: .620-.630 in OD. Rain Bird Easy-Fit: 0.63-0.70 in OD, 0-60 psi[4][5]Easy-Fit's stated range starts at 0.63 in; Rain Bird does not list .620 in.
- Locking-nut and universal fittings
- Raindrip Smart Loc S5600UB lists .520 x .620 in (up to 50 psi). Orbit 67466 coupling and 67468 end cap: .620-.710 in OD. DIG NUTLOC: .530, .600 or .620 in ID, described as .630-.710 in OD[2][6][7][8]DIG describes NUTLOC from .630 in OD, so a .620 in OD tube sits just below DIG's stated range.
- Barbed fittings
- Not confirmedNo source in our register ties a 1/2 in barbed insert fitting to .620-.630 in OD tubing.
- Reducers and adapters
- DIG D50G reducing coupling (green): joins .700 in OD to .620 in OD tubing[4]
- End closures, plugs and stakes
- Orbit 67468 end cap: .620-.710 in OD, reusable nut. DIG R61B: 8 in wire stake for 1/2 in tubing[7][9]
- How to identify it
- Read the print on the tubing first. Then cut a fresh, square end and measure the OD across the outside with calipers; a reading near .620-.630 in puts it in this size. Drip Depot says to check a tube's ID and OD before buying fittings. Steps: [how to measure drip tubing](/guides/how-to-measure-drip-tubing); lookup: [tubing size finder](/tools/drip-tubing-size-finder)[10]
- Maker-page conflicts
- Raindrip's FAQ says its 1/2 in fittings take tubing with an I.D. of .620-.630 in, while its Smart Loc page uses .620 as an OD. Do not pick a fitting from the FAQ figure[11][2]
- Not confirmed
- Not confirmedNo source gives a measuring tolerance for OD. Rain Bird states no ID for T63. No maker says one fitting is made for both Raindrip's .620 in and Rain Bird's 0.63 in tubing, beyond fittings whose stated range covers both.
Watch out for
- Rain Bird's Easy-Fit range starts at 0.63 in OD, so Rain Bird does not list it for .620 in tubing.
- Raindrip's FAQ quotes .620-.630 in as an I.D., but Raindrip's own Smart Loc page uses .620 as an OD. Go by the product page.
- On DIG compression fittings the green insert is the one listed for .620-.630 in OD; the black insert is for .700 in.
- DIG describes NUTLOC from .630 in OD, while Orbit's 67466 range starts at .620 in.
What fits
Product details below are the seller's own description unless a source is shown. Pick the variant named for each item.
0.63 in OD tubing
Rain Bird T63‑100 1/2 in blank distribution tubing (0.63 in OD, 100 ft)Choose the T63-100 100 ft coil.
Rain Bird lists T63 at 0.63 in OD and 70 psi; it does not state the ID.
Compression coupling
Rain Bird Easy-Fit EFC25‑1PS 1/2 in universal compression coupling (0.63‑0.70 in OD)Choose the EFC25-1PS coupling for 0.63 in OD tubing such as T63.
Rain Bird lists Easy-Fit for 0.63-0.70 in OD, which does not include .620 in.
Nut-lock coupling
Raindrip Smart Loc S5600UB universal coupling (0.620, 0.700 and 0.710 in OD)Choose the S5600UB coupling for .520 x .620 in tubing.
Raindrip lists .520 x .620 in among its three pairs, up to 50 psi.
Universal coupling
Orbit 67466 1/2 in universal drip coupling (0.620‑0.710 in OD)Choose the 67466 coupling.
Orbit lists .620-.710 in OD; the nut loosens to remove the tubing.
Questions
Is Rain Bird T63 the same as .620 tubing?
Rain Bird lists T63 at 0.63 in OD, and Raindrip lists a .520 x .620 in size. They differ by .010 in, so pick a fitting whose stated range covers your measured OD, such as Orbit's 67466 at .620-.710 in.[1][2][6]
Which DIG compression fitting takes .620 tubing?
DIG lists its green-insert compression fittings for .620-.630 in OD. To join it to .700 in tubing, DIG lists the D50G reducing coupling.[4]
Can I use Raindrip's FAQ figure to choose a fitting?
No. The FAQ calls .620-.630 in an I.D., while Raindrip's Smart Loc page uses .620 as an OD. Measure the OD and match it to a product page; see the 1/2 in size guide.[11][2]