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Duotight Push-In Fitting - 8 mm (5/16 in.) x 1/4 in. BSP
DUO103

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

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Description

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.
 
 
Features:
  • 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: KL06897

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 7 questions Browse 7 questions and 13 answers
Why did you choose this?
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Need to connect beer line tubing
Valued C on Jan 27, 2023
To adapt my CO2 regulator for use with DuoTight hoses.
Tyler Crawford on Dec 13, 2022
Need to connect beer line tubing
Valued C on Jan 27, 2023
Attach to Regulator
Calvin M on Jan 10, 2023
To adapt my CO2 regulator for use with DuoTight hoses.
Tyler Crawford on Dec 13, 2022
because I screwed up and ordered the 1/2" version first
JOHN W on Nov 23, 2022
Convert my regulator and distribution block to EVABarrier tubing
Richard J DePas on Nov 16, 2022
plugs into my manifold no more leaking clamps
Nobody Important on Nov 12, 2022
Replacement part
Neil C on Nov 4, 2022
I over tightened and drove it.
Abran on Oct 31, 2022
Need replacement
Yale H on Aug 30, 2022
Trying to convert my oxy wand to Doutight
Scott on Aug 27, 2022
EVABarrier and DuoTight is the best system for lines
Clifford W on Aug 23, 2022
Hook to regulator
john w on Aug 19, 2022
Easy fit
Cesar M on Aug 18, 2022
Fitting for my gas regulator
Anthony F on Jul 23, 2022
to attach 8mm eva tubing to gas regulator
Trevor S on Jul 19, 2022
Switch to Duoright for Counter Pressure Bottle Filler
Joseph Pitz on Jul 14, 2022
Ratings
David B on Jun 17, 2022
Easy install
Scott T on Apr 28, 2022
Complete rebuild of gas side in my Kegerator.
Trevor W on Apr 6, 2022
Backup part
Steve G on Nov 16, 2021
Hopefully to screw into regulator
Victor B on Jun 10, 2021
Upgrading beer lines.
Carl S on Jun 9, 2021
Upgrading beer lines.
Carl S on Jun 9, 2021
Want extras
Nicholas C T on Jun 3, 2021
To add this to my grainfather conical fermenter so I can close transfer into keg.
Randall K on Jun 2, 2021
Original duotight for the Fermzilla sheared at the threads.
Matthew H on Apr 20, 2021
Draft conversion
Thomas C on Apr 15, 2021
Great replacement for old-style gas system
Andrew H on Feb 26, 2021
converting to all duotight - this is for the gas side
Andrew H on Feb 12, 2021
Hoping it fits the counter pressure filler
John Schink on Feb 9, 2021
I am modifying a regulator to use duotight
Justin Maksim on Feb 4, 2021
Secondary regulator
Joe M on Feb 2, 2021
to connect to water supply for carbonator
Matthew Sabin on Jan 30, 2021
Switch out connector on manifold and regulators
Tremaine Hart on Dec 10, 2020
I hope I can use it in my gas manifold to allow the EVA barrier as gas line
Charles E on Oct 22, 2020
Converting Gas/Liquid lines to Duotight Fittings
Sean K on Oct 13, 2020
Hoping this will fit on my taprite regulator
Brian Rieck on Oct 5, 2020
Looking to convert 2 manifolds to duotight
Michael B on Sep 22, 2020
Changing my equipment for my kegerator.
Mike D on Sep 2, 2020
Replacement on a standard 1/4 inch manifold
Matthew J M on Jun 12, 2020
infuser build
aaron w on May 23, 2020
Want to try its fitting on a taprite regulator and a tap cooler counter pressure bottle filler
Michael A on May 16, 2020
Bought this to change and upgrade my draft system.
Chris P on Apr 14, 2020
Hoping that bsp will thread into npt
Justin B C on Apr 4, 2020
Supplies
Michael D on Jan 31, 2020
Supplies
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
Attach to Regulator
Calvin M on Jan 10, 2023
because I screwed up and ordered the 1/2" version first
JOHN W on Nov 23, 2022
Instead of trying to mate this BSP fitting to a NPT fitting, shouldn't we just get the H853, which is actually NPT? Then a regular DUO106 should screw right on the male flare from the H853? I'm suspicious of trying to use a BSP male in an NPT female.
Jeffrey Hasterok on Oct 22, 2020
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
Brass Flare Fitting - 1/4 in. Flare x 1/4 in. MPT
Brass Flare Fitting - 1/4 in. Flare x 1/4 in. MPT
Duotight Push-In Fitting - 8 mm (5/16 in.) x 1/4 in. Flare
Duotight Push-In Fitting - 8 mm (5/16 in.) x 1/4 in. Flare
BEST ANSWER: That’s my same question.
Will this work with the Taprite 1060 Regulator?
Paul Adair on Apr 18, 2019
BEST ANSWER: The thread on this fitting is 1/4" BSP and NOT the same as the -5 straight thread O-ring fitting used on the outlet of the TapRight shut-off valve. This fitting will screw into the 1/2"-20 female thread on the valve outlet, but is too long to compress the o-ring and seal. I tried cutting off some of the male BSP fitting with limited success.
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: I tried this on my dual Tap-Right regulator and it did NOT work. I removed the 5/16" brass barbed end, keeping the brass on/off lever in place on the regulator. The fitting began to thread in but bound up before fully seating and didn't thread in enough to get the O-ring compressed. I tested and they leaked. So against my instincts I tried tightening to compress the O-ring and they stripped. I believe the question states the problem correctly, the threads are not the same.

I mentioned brass above because I've seen pictures that seem to show a different type of on/off lever body on the tap-rights, maybe those have a compatible thread type.
I want to install a thermowell with 5/16 OD (8 mm - see picture) to my fermzilla fermenter. Is this the right bulkhead for it?
Stefan Mueller on Nov 16, 2020
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
Thermowell - 15 in.
Thermowell - 15 in.
BEST ANSWER: Might work as but its not a true Bulkhead fitting which would have the backing plate and seal with nut.....Instead I'd Go here Canuck home brew supply as they have bulkheads and more... Hope this helps with your project.

David
Does this include the nut?
Miles Juett on Apr 21, 2022
BEST ANSWER: That piece is designed to screw into the regulator. Just wrap it with plumbers tape two or three times and thread into the regulator. Be careful not to over tighten.
Can the barb be removed and replaced with DUO103 Duotight Push-In Fitting - 8 mm (5/16 in.) x 1/4 in. BSP?
Richard J DePas on Nov 7, 2022
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
1/4
1/4" Aluminum Gas Manifold
BEST ANSWER: Most definitely, i recommend still using Teflon tape
Any issue using this as a fitting for the 10" water filter? I have chlorinated water and was concerned about degrading the fitting
Ross Sigworth on Sep 3, 2020
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
Filter Canister Housing - 10 in.
Filter Canister Housing - 10 in.
BEST ANSWER: The fitting won’t have any issue with it for degradation, but there is a minor concern with it for design. First, the threads are not directly compatible. You’ll need a reducer bushing threaded 1/2” male NPT on the outside and 1/4” female NPT on the inside. Plastic recommended, get some good pipe tape like Blue Monster. Use three wraps, and be careful not to cross-thread it. The Duotight fitting is BSP, not NPT, though they are theoretically compatible. As it is a straight thread instead of a taper, the rubber sealing gasket at the base provides the seal, instead of the interface of the tapered pipe threads. You may need a small amount of pipe tape, but try it without first, you may get a good seal on your first shot.

Good luck, I’m really happy with these Duotight fittings, and am gradually getting rid of everything else.
Reviews

4.3 / 5.0
8 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
6
0
1
0
1
Rated 5 out of 5
Worked for my cheap CO2 regulator
I have been wanting to replace my CO2 line for EVABarrier + Duotight for some time but I was stumped how to connect to my cheap, no-name CO2 regulator. After spending quite a bit of time looking into it, I felt this was my best option and to my surprise, it worked great. I unscrewed the barb on the output of the cut-off valve and screwed this in after cleaning and sanitizing it. I did not use teflon tape on the threads, mainly because I did not think about it, but I did put some keg lube on the o-ring and I was able to tighten until the o-ring made good contact. I tested the connection by both using a foaming agent on the joints and by pressurizing the line, turning off the CO2 tank and checking the pressure in the line over night. Neither test indicated a leak so I think the o-ring seems to be sufficient to keep the CO2 in.
March 24, 2023
Rated 5 out of 5
Duotight 8mm x 1/4 BSP fitting replaced regulator barb just fine
I added some premium Teflon plumbers tape to the threads, as I didn't trust just the O-ring by itself. No leaks.
Look Ma, no hose clamp!
Look Ma, no hose clamp!
January 24, 2023
Purchased
1 year ago
Rated 5 out of 5
These things are awesome!
I had an existing system that had a 6 port manifold with regular barb and tubing. I removed all of the barbs and swapped them for these fittings and easily converted my entire system to use Duotight. So glad I did. You don't need to fuss with teflon tape, clamps, etc. Just twist on, tighten with a wrench, and you're good to go.
May 15, 2021
Purchased
over 3 years ago
Rated 5 out of 5
These make gas or liquid connections a breeze
March 22, 2021
Purchased
over 3 years ago
Rated 1 out of 5
Not for secondary regulators
Do not use these for secondary regulators. They will not seat properly and they will leak and strip. I would recommend getting the brass nipple and duo106. Don't make the same mistake I did. At least these fittings are cheap, just a shame that I have to throw them out now and wait another week to get the right ones.
February 8, 2021
Rated 3 out of 5
Decent, but harder to seal then some others
Little more finicky than the other duotight fittings I used. Also, could not get to fit on one of my secondary regulators input due to the rim on the bolt and the angle of the input making a seal impossible. Worked on my primary output well.
November 4, 2020
Purchased
over 3 years ago
Rated 5 out of 5
No more hose clamps!
Bought 2 sets of these for a couple of keezers, and they immediately improved our setups! No more issues with hose clamps...
So good! Bought a bunch for 2 keezers, they immediately made our setups better; no more hose clamps!
So good! Bought a bunch for 2 keezers, they immediately made our setups better; no more hose clamps!
October 13, 2020
Purchased
over 3 years ago
Rated 5 out of 5
Great for short 200mm thermowells in bucket lids
I use tandem short thermowells in my brew buckets. great with any length 7mm SS immersion wells. Standard bucket with 2 wells, (1 for external monitoring, 1 for controller), heating pad, and cooling source=commercial level control in a basement cave.
June 4, 2020
Purchased
over 4 years ago