Currently the Gen4 model of bulkhead, but is also the Gen2 model of duotight.

Suitable for fixing thermowells to FermZilla lids or any sort of fermentation vessel. When cut and drilled correctly, it will hold pressure up to 30psi.

Overall Length: 38.5mm

Generation 2 duotight
- Colour Coded Collets (6.35mm [1/4"] = Green ~ 8mm [5/16] = Black ~ 9.5mm [3/8] = Blue)
- Burst pressure is over 300psi @ 25°C
- Material Polyketone (POK) no longer Acetal (like John Guest Fittings)
- Higher Chemical & UV Resistance
- Excellent Gas Barrier Properties with EPDM + Silicone Seals
- Superior Performance in Cold Temperatures
- Easier to fit with Gauge depth indicators >| |<

Compatible with our
KL06224 - EVABarrier 4mm ID x 8mm OD line
KL06231- EVABarrier 5mm ID x 8mm OD line
KL42741 - Red EVABarrier 5mm ID x 8mm OD line
KL42765 - Black Lightshield EVABarrier 4mm ID x 8mm OD line
Not compatible with 6mm ID x 10mm OD line

The thread on this fitting will suit:
MFL Threaded Ball Lock and Pin Lock Disconnects
MK3 & MK4 Regulators
Many other home brew fittings with MFL Thread
Please note it does not suit the MK5 Regulator

Looking for high quality push in fittings that will seal tight? duotight are the push in fitting with superior sealing capacity due to the double o-ring sealing design.

Why do we use Double O-rings?
The secret to our superior sealing performance is not just the fact that we use high quality EPDM and a Silicone O-Ring.

Why two different materials?
EPDM has a high gas and chemical resistance, but when chilled it can shrink slightly. Silicone O-Rings are also very chemical resistant but perform far better under sub-zero conditions not losing their shape.
By having the best of both worlds we're making sure there is twice as much sealing surface compared to other push in fittings on the market with just one.
This makes our fittings even more reliable across a multitude of applications and reduces the chance of a leak significantly.

The double o-ring system also means that we can bend the hose with much tighter radius without causing leaking issues. This typically can be an issue with other fittings. This combination of factors makes duotight fittings the most reliable push fit fittings on the market.

No clamps necessary!
We do recommend cutting your hosing straight, not on an angle, to ensure the line has a complete seal. To remove the fitting simply push in the collet and the hose can be removed.

1/4" Threaded duotight Fittings

duotight - 8mm (5/16') Female x 1/4' Male Thread Bulkhead (suits 60cm Thermowell)

(10 Pack) 1/4 Inch Threaded Male duotight O-ring

duotight – 8mm (5/16”) Female x 1/4 Inch BSP Male Thread (With Seated O-Ring)

monotight - 6.35mm (¼') Female x ¼' BSP Male

duotight - 6.35mm (1/4'') x 1/4 inch Male (with oring)