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Duotight Push-In Fitting - 8 mm (5/16 in.) Ball Valve

Duotight Push-In Fitting - 8 mm (5/16 in.) Ball Valve

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This Duotight ball valve can be used as an inline shut off valve on draft lines. Compatible with EVABarrier 8 mm OD Tubing (D1717 & D1718).
Duotight fittings are high-quality push-in fittings that seal tight and offer superior sealing capacity due to the double O-ring sealing design.
High Performance Double O-Ring Design:
The secret to Duotight’s superior sealing performance comes from the fact that they use not one, but two high-quality EPDM O-rings.  The double O-ring means they have literally twice the sealing surface when compared with other push-in fittings.  This makes them more reliable and significantly reduces the chance of leakage.
The double O-ring system also means that tubing can be bent at a much tighter radius without causing leaking issues, which can be an issue with other fittings.  This combination of factors makes Duotight the most reliable push-in fittings on the market.
EPDM offers excellent chemical resistance for a longer life span. When compared with silicone and vinyl, EPDM has much better gas transmission rates, better wear resistance, and is BPA-free.
No Clamps Necessary!
We recommend cutting your tubing straight, not on an angle, to ensure the line forms a complete seal. To remove the fitting simply push in the collet and the hose can be removed.
  • Insert tubing and firmly push to connect
  • Easily release tubing by pushing in the collet
  • Suitable for both gas & beverage applications
  • Made from food-grade acetal plastic
  • Double O-rings made from highly chemical resistant EPDM
  • Locking teeth made from stainless steel
  • Pressure rated to 150 psi
  • Temperature rated to 212°F (100°C)

Please note: exposure to chlorine will degrade the acetal plastic and stainless steel these fittings are made from. Do not use in contact with bleach or other chlorinated cleaning chemicals.


Item # DUO101
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 0.05 LBS
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it fits
James W on Feb 19, 2020
Anthony K on Jan 7, 2020
it fits
James W on Feb 19, 2020
Michael D on Jan 29, 2020
Anthony K on Jan 7, 2020
fits 5/16 poly line
Robert S on Jan 6, 2020
adapt gas lines to 8mm tubing
Ben B on Dec 5, 2019
for counter flow chiller
ben b on Dec 3, 2019
Two keg setup turn off gas when only one keg in system
Zak H on Oct 14, 2019
part of the duotight system
Mark L on Oct 14, 2019
This was the only place I could find a 5/16" ball valve.
DOUGLAS C on Sep 12, 2019
system upgrade
Robert A W on Sep 5, 2019
Fits my new keggerator lines
Steven Kendall on May 2, 2019
Only 5/16 OD push-connect shut-off fitting I can find
Chris T on May 2, 2019
Michael D on Jan 29, 2020
fits 5/16 poly line
Robert S on Jan 6, 2020

5.0 / 5.0
1 Review
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Awesome affordable connections
These things are great. Instead of buying a 4 -way manifold, just use these fittings and some tubing to build your own for just a few bucks!
September 12, 2019
6 months ago