If you are looking to an alternative to cutting tubing and pressing it over hose barbs with hose clamps, with the resultant difficulty in dissassembly, you might find the DuoTight System interesting. Based on double O ring sealed push in fittings, DuoTight allows easy repeated hose attachment and removal, as well as EVABarrier lined odorless tubing that costs no more than economy PCV tubing.
DuoTight features a patented dual O ring sealing system using high quality EPDM o-rings. The double o-ring means DuoTight have twice the sealing surface surface when compared with other push in fittings. This makes DuoTight even more reliable and reduces the chance of a leak. The double o-ring system also means that you can bend the hose with much tighter radius without causing leaking issues.
Clamps are not needed. To use the DuoTight System, simply cut your EVABarrier tubing to length (cut tubing square for best results, not at an angle), and push into the DuoTight fitting. To remove the tubing, simply press back on the sealing flange and pull the hose out. EVABarrier Hose and DuoTight fittings are rated up to 100 PSI.
This fitting features a ¼" Female Flare for attaching to threaded ball and pin lock fittings, or any male ¼" flare, such as the outlet of a gas regulator.
The fitting seals tight without teflon tape when using plastic ball and pin locks, but you will need to wrap stainless male flare threads is a bit of teflon tape to get them to seal before threading these on.
Compatible with: - EVABarrier 4mm ID x 8mm OD line (item Z91)
- EVABarrier 5mm ID x 8mm OD line (item Z92)
Also fits the C02 inlet on the SQUAREONE® keg system, in case you want to use 8mm EvaBarrier Gas Tubing and an external regulator instead of 16 gram C02 cartridges.
Aug 16, 2020 by Shane
Q: Do these need a nylon washer when connecting to gas regulator or manifold?
A: Generally not, hand tighten and then tighten 1/4 turn with a wrench. In hard to seal cases, you may need to use a bit of teflon tape.
Aug 07, 2020 by Chris
Q: Does this connector work with the Nitrogen regulator?
A: Yes, this works with any 1/4" male flare fitting.
Jul 23, 2020 by Gozie Boy
Q: Regarding Customer Reviews on this item, please confirm whether these are authentic DuoTight products and have two seals, or are they knock offs? Thanks.
A: These are genuine DuoTight products with two seals.
Aug 06, 2019 by RJ
Q: Are these compatible with 5/16" OD lines such as ultra?
A: They should be compatible as 8mm and 5/16 are both 0.31 of an inch.
Good but watch for failures
I've used these for several years and overall it's the best and easiest way to connect stuff. But several have failed by cracking in the threaded end. Don't over-tighten them (finger tight seems to suffice), keep some spares, and suspect them first when you get a leak.
Embree
I will continue to use Williams when I order products and parts
8 mm to flare fitting
I converted my keg system over to these fittings. They are easy to use and don't leak initially. However I have had two of them just outright fail and bust in half after a short period of time. I lost an entire cylinder of CO2 after the fitting on the regulator failed. Use this particular fitting with caution.
William's Brewing Responds: A good thing to do to make sure they are not too tight and stressing the plastic is to hand tighten, and then tighten with a wrench 1/4 of a turn.
Awesome & easy
I've switched everything in my kegging setup over to duotight and these connectors are awesome! Haven't had an issue with leaking and so easy to insert tubing and remove it. Highly recommended!
All duotight in a new kegerator
Used all duotight fittings in a new kegerator build. Unfortunately I had two of these fittings crack in the middle on a gas distribution manifold. Hand tightened and only about another 1/2 turn with wrench on all fitting connections. All were holding pressure initially but after changing a keg from 20 psi to 12 psi, the connector started to leak. Changed to swivels on the gas manifold. I have these fittings on ball lock connectors for gas and liquid and on shank connector with no issues.