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

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

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This Duotight check valve is a great idea for protecting your regulator. It has a low opening pressure of 1 psi, and since it cannot be opened or taken apart, it is recommended for gas applications only. The internal components are made from stainless steel. 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.

Kegland Part number: KL07047Kegland Part number: KL07047

Item # DUO110
Shipping Eligible for Free Shipping Program
Availability California - Out Of Stock
Pennsylvania - In Stock
Weight 0.05 LBS
Community Q&A

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prevent back-flow in 8 mm EVABarrier
Christopher N L on Jan 8, 2022
To stop carbonation from going back into our house water.
D Paul M D on Dec 16, 2021
prevent back-flow in 8 mm EVABarrier
Christopher N L on Jan 8, 2022
Regulator protection
Stephen L on Dec 30, 2021
To stop carbonation from going back into our house water.
D Paul M D on Dec 16, 2021
Protect my gauges
John E on Dec 2, 2021
Parts for a custom built 8-tap kegerator.
Kyle Heon on Dec 2, 2021
keezer and fermentation fridge parts
George S on Nov 17, 2021
Multiple kegs running different pressures and gas charging on the liquid line to prevent backflow into your gas lines.
Jonathan N on Nov 16, 2021
Converting Keezer from Poly to EVA
Mike D on Oct 21, 2021
protect my regulators
Chris Dornbach on Jul 9, 2021
Each gas line should have one in case of a low pressure (empty cylinder) event, to prevent fluids from backflowing.
Bradley M on Jun 9, 2021
Reduce risks from beer going into my gas lines
Mauricio Aguilar S on Jun 4, 2021
Want extras
Nicholas C T on May 31, 2021
I want to add check valves to
Jeff M on Apr 16, 2021
Least cost to do the job
Krista T on Mar 26, 2021
great in-line application
Andrew H on Feb 26, 2021
converting to all duotight - this is for the gas side
Andrew H on Feb 12, 2021
need it
MARVIN M on Jan 22, 2021
redoing my kezzer and want to simplify my system heard of these on Brulosophy
Paul K on Jan 6, 2021
Shilah M on Dec 17, 2020
keep beer from running up the gas line
Matthew Sabin on Dec 15, 2020
for use on my gas line
Joshua V H on Dec 13, 2020
protects air lines
MICHAEL E. on Nov 21, 2020
Prevent Beer from backing up into my CO2 Lines
Jason Peterson E on Nov 17, 2020
To keep beer from backflowing into gass line
David A on Nov 10, 2020
Try it out
Noah Burgos on Nov 3, 2020
matches what came with kegerator
Tom T on Sep 17, 2020
Changing my equipment for my kegerator.
Mike D on Sep 2, 2020
To protect my regulator
Jason T B on Aug 7, 2020
I have had beer back up into gas lines when pressure in keg was greater than pressure of draft system
Kurt H on Jul 20, 2020
For a second in line Duotight regulator.
Adam D on Jul 9, 2020
Ease of use. Better connector. To use with carb and line cleaning ball lock cap
John Z on Jun 25, 2020
Building a keezer, figured it'd be a good addition for a not-a-manifold solution.
Michael B on Jun 13, 2020
go with the EVABarrier tubing, add quick connection
Gregory G on Jun 12, 2020
Prevent liquid back flow from destroying my regulator
Matthew J M on Jun 11, 2020
converting all lines to duotight, also filling keg-to-keg. check valves in these instances seem prudent
Matthew S on Jun 6, 2020
ease of use for building four way secondary regulator
Thomas Parshall on May 20, 2020
Connecting CO2 to liquid keg connection for faster carbonation.
Eric N J on Apr 15, 2020
Setting up new draft system
Joseph M on Dec 10, 2019
To keep beer from backflowing into my regulator
Todd M on Nov 20, 2019
add on
Robert A W on Sep 5, 2019
draft system
Chris G on Aug 28, 2019
Quick and easy kegerator setup
Steve T on Jun 3, 2019
Fits my new keggerator lines
Steven Kendall on May 2, 2019
Regulator protection
Stephen L on Dec 30, 2021
Protect my gauges
John E on Dec 2, 2021
Where do I connect it?
Dmytro Dobrovolskyi on Dec 13, 2021
BEST ANSWER: Between the ball lock and manifold or tank on the gas side. Make sure the arrow is going toward the keg so gas can flow to the keg.

5.0 / 5.0
3 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
Love them. Keeping my gas line clean of liquid due to pressure equalizing.
October 25, 2021
3 months ago
Rated 5 out of 5
No leaks, easy to hook up lines
March 22, 2021
11 months ago
Rated 5 out of 5
Not much to say...it's a good check valve :)
July 9, 2020
1 year ago