Duotight Push-In Fitting - 8 mm (5/16 in.) x 1/4 in. BSP

Duotight Push-In Fitting - 8 mm (5/16 in.) x 1/4 in. BSP

In Stock
60 day no hassle return policy. Details

This Duotight fitting with 1/4" male thread is a great option for connecting gas line to regulators and manifolds that have 1/4" FPT. Comes with seated O-ring. 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 # DUO103
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 0.05 LBS
Community Q&A

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Browse 3 questions Browse 3 questions and 17 answers
Why did you choose this?
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infuser build
Aaron W on May 23, 2020
Hoping that bsp will thread into npt
Justin B C on Apr 4, 2020
infuser build
Aaron W on May 23, 2020
Bought this to change and upgrade my draft system.
John C P on Apr 14, 2020
Hoping that bsp will thread into npt
Justin B C on Apr 4, 2020
Michael D on Jan 31, 2020
Michael D on Jan 29, 2020
convert secondary regulator from barb to duotight
steve geer on Dec 21, 2019
Setting up new draft system
Joseph M on Dec 10, 2019
To fit into my CO2 regulator output
Mrob on Nov 12, 2019
Best fittings available
Raymond Stieber on Oct 22, 2019
part of the duotight system
Mark L on Oct 14, 2019
Like the product and know I get consistent leakproof results everytime
David C on Oct 12, 2019
Upgrading my system
Robert H on Oct 3, 2019
Hopefully gonna swap out gas lines
garrett shuck on Jul 22, 2019
Spoke with MoreBeer at Brew England 2019
David C Lavery on Jul 2, 2019
Superior Duotight double o-ring sealing
Chris T on May 2, 2019
Bought this to change and upgrade my draft system.
John C P on Apr 14, 2020
Michael D on Jan 31, 2020
1/4" BPS (19 TPI) isn't the same as 1/4" NPT (18 TPI). Will they still create an effective coupling? Will gas leak at something less than the rated 150 psi?
David Napack on Mar 27, 2020
BEST ANSWER: Ive been using a couple of them for a while now, they seem to be sealing properly, there is an o-ring at the base of the threads that makes the seal. Will say I’m sad I built my entire keezer with conventional hose and connections before finding this system, if I was starting from scratch I would use these exclusively, I’m tremendously happy with the versatility and cost.
Will this work with the Taprite 1060 Regulator?
Paul Adair on Apr 18, 2019
BEST ANSWER: Hi Paul - As long as the regulator has 1/4" FPT, it will be compatible.

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