How to Pump Up a Duotone Wing: Complete Setup & Inflation Guide
Knowing how to pump up a Duotone wing properly sounds like one of the simplest parts of wing foiling, but it is worth getting right.
The correct pressure affects how stiff the wing feels, how efficiently it generates power, how well it pumps onto foil and how stable it remains when the wind gets gusty. Just as importantly, forcing the wrong valve, using the wrong pressure or rigging the wing badly can damage an otherwise very expensive bit of equipment.
This guide explains how to inflate the current Duotone wing range properly, including the Duotone Unit 2026, Duotone Unit SLS 2026, Duotone Unit D/LAB 2026, Duotone Float SLS 2026 and Ventis FS.
We also cover Fusion Handles, the Fusion Boom, pressure settings, deflation, packing and the mistakes we regularly see people make.
The quick answer: how do you pump up a Duotone wing?
- Unroll the wing somewhere clean and free from sharp objects.
- Fit your Fusion Handles or Fusion Boom if they are not already attached.
- Check the wing's dump valve and Lazy Pump connections are correctly closed.
- Unscrew the Air Port Valve II cap.
- Insert the Duotone pump hose into the valve.
- Rotate it clockwise by roughly 90 degrees until correctly located.
- Inflate to the pressure printed for your exact wing size.
- Rotate the pump connection back approximately 90 degrees anticlockwise.
- Remove the hose and securely replace the valve cap.
- Attach your wing leash before taking control of the inflated wing.
The important bit is step seven: do not assume every Duotone wing should be inflated to the same PSI. Pressure changes according to model and wing size.
Why correct wing pressure matters
An inflatable wing is effectively an airframe. The leading edge and centre strut create the structural skeleton that holds the canopy in its designed shape.
Too little pressure and the wing can feel soft, fold under load, respond slowly and lose pumping efficiency.
Too much pressure is not better. It places unnecessary load on the bladder, seams and valve system and takes the wing beyond the pressure specified by the manufacturer.
We regularly hear riders say a wing “feels about right”. That is not how we recommend setting one up. Use the pressure gauge and inflate it to the specification for that particular size.
Before you start: choose a sensible place to rig
Try to avoid inflating a wing on gravel, shells, sharp stones, thorns or anywhere with broken glass.
Grass is ideal where available. Sand is normally fine, although it is worth keeping the valve and pump hose as clean as possible.
Also think about the wind before you start. Once the wing begins taking shape it can produce a surprising amount of pull.
Have the leash ready, keep control of the wing and do not leave an inflated wing unsecured on a windy beach.
Which pump do you need for a Duotone wing?
The straightforward manual option is the Duotone Pump. It includes the correct fitting for Duotone wings and is simple, reliable and easy to keep in the van.
If you inflate wings regularly, use several wings during a session or simply want to save some energy before getting on the water, the Duotone Lazepump Rechargeable E-Pump is also worth considering.
The advantage of an electric pump is consistency. Set the correct pressure for the wing and let the pump do the work while you assemble the rest of your foil setup.
Whichever pump you use, never simply set it to a generic “wing pressure”. Check the wing first.
Step 1: unroll the wing completely
Take the wing from its bag and roll it out with the leading edge facing into a position where you can reach the valve easily.
Do not drag the wing across the ground to reposition it.
Check quickly for anything unusual:
- twisted bladder sections;
- damage around the leading edge;
- sand or grit around the valve;
- open dump valves;
- disconnected Lazy Pump tubes;
- anything caught or folded awkwardly inside the wing.
If the wing has recently had a bladder replaced or repaired, inflate it gradually at first and check that the bladder is sitting correctly before taking it to full pressure.
Step 2: fit the Duotone Fusion Handles or Fusion Boom
Current Duotone Unit wings use Duotone's modular Fusion control system.
That means the wing itself is normally purchased separately from the controls and you choose either Duotone Fusion Handles or the Duotone Fusion Boom.
| Wing size | Fusion Handles | Fusion Boom |
|---|---|---|
| 2.0m | Not used | Small 72cm |
| 2.5m–3.0m | Medium 43/31cm | Medium 84cm |
| 3.5m–6.5m | Large 55/31cm | Large 96cm |
Fit these while the wing is deflated and lying safely on the ground.
Make sure the bases are correctly seated against the attachment patches and use the supplied hardware. Once properly installed, most riders leave the handles or boom attached when packing the wing rather than removing them every session.
Fusion Handles or Fusion Boom?
There is no universally correct answer.
Choose Fusion Handles if you like distinct hand positions, compact packing and a traditional two-handle wing feel.
Choose the Fusion Boom if you prefer being able to slide your hands freely, find hand positions instantly during transitions and use one continuous control surface.
If you are unsure, this is exactly the sort of difference worth feeling rather than guessing. Selected Duotone equipment can be explored through Try It Now at The SUP Co x Lymington.
Step 3: check the valves before inflation
Duotone wings use the Air Port Valve II for inflation.
Before connecting the pump, make sure any separate dump valve is properly closed and that the Lazy Pump connection between the leading edge and strut is correctly secured.
This connection allows the airframe to inflate as a complete system.
If you start pumping and one part of the wing is not filling normally, stop and check the setup rather than simply adding more pressure.
Step 4: connect the pump to the Air Port Valve II
Unscrew the protective valve cap.
Insert the end of the Duotone pump hose fully into the blue section of the Air Port Valve II.
Rotate the hose connection and blue valve ring clockwise by approximately 90 degrees to secure it.
Do not keep twisting it beyond the intended stop. The connection only needs to rotate far enough to engage correctly.
Step 5: pump the wing to the correct PSI
This is where it pays to check the specification rather than relying on memory.
Duotone Unit 2026 inflation pressures
The following pressure table applies to the corresponding sizes across the 2026 Unit family, including the standard Unit and Unit SLS. The Unit D/LAB begins at 3.5m.
| Duotone Unit size | Maximum inflation pressure |
|---|---|
| 2.0m | 11 PSI |
| 2.5m | 10 PSI |
| 3.0m | 9.5 PSI |
| 3.5m | 9 PSI |
| 4.0m | 8.5 PSI |
| 4.5m | 8 PSI |
| 5.0m | 8 PSI |
| 5.5m | 7.5 PSI |
| 6.0m | 7 PSI |
| 6.5m | 7 PSI |
Notice what happens here: the smaller wings run at substantially higher pressure than the larger ones.
That is exactly why “I always pump my wing to 8 PSI” is not a particularly good rule.
Duotone Float and Float SLS 2026 inflation pressures
| Float size | Maximum inflation pressure |
|---|---|
| 2.0m | 8 PSI |
| 2.5m | 8.5 PSI |
| 3.0m | 9 PSI |
| 3.5m | 9.5 PSI |
| 4.0m | 9 PSI |
| 4.5m | 8.5 PSI |
| 5.0m | 8 PSI |
| 5.5m | 7.5 PSI |
The Duotone Float SLS 2026 is also different from the Unit in another important way: it is a specialised wave/freefly wing designed around the Fusion Boom rather than a choice between boom and handles.
Duotone Ventis FS inflation pressure
| Ventis model | Size | Maximum pressure |
|---|---|---|
| Ventis FS | 7.0m | 7 PSI |
| Ventis FS | 8.0m | 7 PSI |
| Ventis FS D/LAB | 7.0m | 7 PSI |
| Ventis FS D/LAB | 8.0m | 6.5 PSI |
Always treat the pressure printed on your actual wing and its current manual as the final authority. Model years change, so do not automatically apply a pressure from an older wing to a newer one.
Step 6: disconnect the pump correctly
Once you have reached the correct pressure, rotate the hose connection back approximately 90 degrees anticlockwise.
This activates the non-return function of the valve.
Remove the pump hose and screw the valve cap back on properly.
The cap is part of the final seal, so do not leave it hanging loose simply because the valve appears to be holding air.
Step 7: check the wing before launching
Before heading onto the water, give the whole airframe a quick inspection.
- Is the leading edge firm and evenly inflated?
- Is the centre strut properly inflated?
- Is the valve cap secured?
- Are the Lazy Pump tubes and clips correctly positioned?
- Are your handles or boom secure?
- Is the canopy sitting normally?
- Is the wing leash attached correctly?
If something looks wrong, sort it on the beach. It rarely becomes easier once you are 500 metres offshore.
Common Duotone wing inflation mistakes
1. Using the same pressure for every wing
This is probably the most obvious mistake. The correct PSI varies substantially by size and model.
2. Pumping by feel
A wing can feel firm by hand while still being below its intended pressure. Use the gauge.
3. Over-inflating for “more performance”
Do not exceed the manufacturer's specified pressure. More PSI is not a free performance upgrade.
4. Forcing the valve
The Air Port Valve II connection only needs around a quarter turn. If something feels badly jammed, stop and check it.
5. Letting sand into the valve
A little care when connecting and disconnecting the pump can save problems later.
6. Forgetting the handles or boom
Current Unit wings are sold around a modular control system. If you are buying your first one, remember to choose the correct Fusion Handle Set or Fusion Boom.
7. Leaving a fully inflated wing cooking in the sun
Air pressure can increase as the wing gets hotter. Do not leave a fully inflated wing lying unattended in strong sun for extended periods.
How do you deflate a Duotone wing?
Move somewhere safe and get the wing under control before opening any valve.
Open the designated dump or deflation valve for your particular model and allow the majority of the air to escape naturally.
Do not stand on the leading edge or violently squeeze the bladder to force the last bit of air out.
Once the pressure has dropped, work the remaining air gently towards the open valve as you roll the wing.
Keep the roll tidy rather than crushing the wing into the smallest possible bundle. The aim is to protect the canopy, airframe, valves and controls, not win a competition for the smallest packed bag.
Should you rinse a Duotone wing after every session?
Not necessarily after every freshwater session, but salt, sand and contamination should not simply be ignored.
If you rinse your wing, let it dry properly before long-term storage.
The more important rule is to avoid leaving it wet and tightly packed for days at a time.
Also inspect your wing periodically. Check seams, handles, the boom, leash attachment and valve area before small issues become larger ones.
Which Duotone wing should you choose?
If this guide has led you here because you are buying a Duotone wing rather than simply setting one up, the simplest breakdown is:
- Duotone Unit 2026: the best starting point for most freeride, beginner and progressing riders.
- Duotone Unit SLS 2026: the performance sweet spot for regular riders wanting a lighter and more direct feel.
- Duotone Unit D/LAB 2026: the premium performance option for experienced riders.
- Duotone Float SLS 2026: the specialist wave and freefly option.
- Duotone Ventis FS: the light-wind specialist for riders wanting more useful sessions in marginal breeze.
For a deeper comparison, read our Duotone Unit 2026: Unit vs SLS vs D/LAB guide.
Try Duotone wing equipment at Lymington
A setup guide can explain the technical side, but differences in wing feel, size and control system make much more sense once you have the equipment in your hands.
At The SUP Co x Lymington, we specialise in wing, foil and technical watersports equipment, with selected products available through our Try It Now service.
It is designed for genuine purchase prospects wanting to compare suitable equipment before committing and is subject to suitability and availability.
Duotone wing inflation FAQs
What PSI should I pump my Duotone Unit to?
It depends on wing size. The 2026 Unit ranges from 11 PSI on the 2.0m to 7 PSI on the 6.0m and 6.5m. A 5.0m Unit is specified at 8 PSI. Always check the pressure shown on your exact wing.
How much pressure does a 5m Duotone Unit need?
The 2026 Duotone Unit, Unit SLS and Unit D/LAB in 5.0m are specified at a maximum inflation pressure of 8 PSI.
Can I use a SUP pump on a Duotone wing?
Only if the pump, hose and adaptor are genuinely compatible with the wing valve and give accurate control in the required pressure range. The simplest option is a dedicated Duotone Pump or compatible Duotone Lazepump.
Does a Duotone Unit come with handles?
Current Fusion-platform Duotone Unit wings are designed so you choose the control system separately. Add either the appropriate Fusion Handle Set or Fusion Boom for the size of wing you are buying.
Can I leave the Fusion Handles fitted when packing the wing?
Yes. Once properly installed, they can normally remain attached when the wing is packed. Pack the wing carefully rather than forcing tight folds around the handles.
Should I inflate my wing harder in light wind?
No. Inflate the wing to the pressure specified by Duotone for that particular model and size. Do not exceed the recommended pressure in an attempt to create additional performance.
Can I try a Duotone wing before buying?
Selected wing and foil equipment may be available to suitable customers through The SUP Co x Lymington Try It Now service. Demo availability varies, so check with the team before travelling.
Need help setting up your Duotone wing?
If you are unsure about pressure, handles, boom compatibility or which Duotone wing size suits you, speak to us before guessing.
Explore the complete Duotone Wing & Foil range at The SUP Company, or visit us at Lymington for practical wing and foil advice.