duotight - 8mm (5/16”) Female x 8mm (5/16”) Female One Way Check Valve (Gas)
duotight - 8mm (5/16”) Female x 8mm (5/16”) Female One Way Check Valve (Gas) is backordered and will ship as soon as it is back in stock.
Delivery and Shipping
Delivery and Shipping
Free Shipping Australia Wide when you spend $300 or more, otherwise it's $14 flat rate.
We have four warehouses in Brisbane, Sydney, Melbourne and Launceston. Your order might ship from any of these warehouse, or from a combination of these warehouses as different stock is located in different warehouses. For our free, flat-rate and Parcel Post deliveries, estimated time from dispatch based on working days from our main warehouse in Brisbane are as follows:
QLD Metro: 1 – 2 days
QLD North: 2 – 4 days
QLD Country: 2 – 6 days
SA Metro: 3 – 5 days
SA Country: 4 – 8 days
NSW Metro: 2 – 3 days
NSW Country: 2 – 7 days
ACT: 2 – 4 days
VIC Metro: 3 – 5 days
VIC Country: 3 – 7 days
TAS: 5 – 10 days
NT Metro: 3 – 6 days
NT Country: 5 – 10 days
WA: 5 – 10 days
For our Express Post deliveries:
ALL Metro: 1 day
ALL Country: 2 – 3 days
Please note, these are estimated shipping times. Weather, human error and other unforeseen circumstances can slow down your order. You will get an online tracking link to follow the progress of your order. If you need your order urgently, we encourage you to select the Express Post option at checkout.
If you suspect any problems or your order has not arrived by the ETA date, please contact us so we can follow it up. If you would like some more clarity around dispatch times including ETAs of goods shipping from our Sydney, Melbourne or Launceston warehouses, please contact us.
duotight - 8mm (5/16”) Female x 8mm (5/16”) Female One Way Check Va...
duotight - 8mm (5/16”) Female x 8mm (5/16”) Female One Way Check Valve (Gas) is backordered and will ship as soon as it is back in stock.
This very handy fitting could save you your regulator and is a good investment. This particular type of check valve has low opening pressure of only 1psi. This check valve is suitable for clean liquids such as water or for gas. The spring and internal components are made with stainless steel and quality EPDM seals.
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
EVABarrier 4mm ID x 8mm OD line
EVABarrier 5mm ID x 8mm OD line
Red EVABarrier 5mm ID x 8mm OD line
Black Lightshield EVABarrier 4mm ID x 8mm OD line
Not compatible with 6mm ID x 10mm OD line
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.
Payment & Security
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