Dorema Magnum Airforce 390 End Bladder

£65.14(inc VAT) £75.99
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  Product Description
The Dorema Magnum Airforce 390 End Bladder is for owners of a Dorema Magnum Air Force 260 or 390 inflatable caravan awning who need to swap a burst short air tube. It's an official Dorema replacement inner air tube, part number 53139, and it fits position 2 on the awning's frame, sized for the 280 cm depth of the Magnum Air Force. A burst air tube is often not repairable, so a new bladder is the usual fix.

Check which air frame your awning has before ordering, the bladder fits both inflation systems. On an OVS (One Valve System) awning you inflate at one point with a hand or electric pump and all the air struts fill, apart from the lower crosses. On an MVS (Multi Valve System) awning, you inflate each strut individually.

Dorema makes two awnings with comparable names, so check you have the right one. The Magnum Air Force has a 280 cm depth, is available in 260 and 390 widths and fastens on the left or right. The Magnum Air has a 240 cm depth and is MVS only. Their air tubes only fit their own awning. Weathertex versions of the Magnum Air Force use a different air tube, so check your fabric version first.

Which Dorema air tube fits the Magnum Air Force 390 awning?


The Dorema Magnum Airforce 390 End Bladder, part number 53139, fits position 2 on Magnum Air Force 260 and 390 awnings and suits the 280cm depth. It works with OVS and MVS frames. It does not fit the Magnum Air, and Weathertex versions of the Magnum Air Force use a different air tube.

Dorema Magnum Airforce 390 End Bladder Features


  • Exact Position 2 Fit: Tailored specifically to fit the curved outer end arches of the Magnum Air Force frame layout.
  • 280 cm Depth Specification: Pre-cut and welded to the exact length required for the 280 cm deep All Season and Klimatex awning models.
  • Dual Inflation Compatibility: Features welded valve ports that seamlessly connect to both the integrated One Valve Inflation (OVS) linkages and individual Multi Valve Inflation (MVS) points.
  • High-Grade TPU: Fabricated from heavy-duty Thermoplastic Polyurethane (TPU) for maximum air retention and puncture resistance.
  • Reinforced Welded Seams: High-frequency welded edges designed to withstand consistent pressure cycling without splitting.
  • High-Pressure Tolerance: Engineered to safely maintain an optimal structural pressure of 8 to 10 psi.

Specifications
  • Compatibility: Fits the Dorema Magnum Air Force 260 and 390 All Season / Klimatex models.
  • Awning Depth Fitting: 280 cm
  • Recommended Inflation Pressure: 8–10 psi (always use a pressure-release pump or gauge to prevent over-inflation)
  • Material: TenCate Dormatex All Season, Klimate (KT)

Frequently Asked Questions


Which awnings does the Dorema Magnum Airforce 390 End Bladder fit?
It's an official Dorema replacement inner air tube for the Magnum Air Force 260 and 390 inflatable caravan awnings, part number 53139. It is sized for the 280 cm depth and fits position 2 on the frame.
Does this bladder fit OVS and MVS awnings?
Yes. It's compatible with both the One Valve System (OVS) and the Multi Valve System (MVS) versions of the Magnum Air Force. Check which air frame your awning has before ordering.
What's the difference between OVS and MVS on the Magnum Air Force?
On an OVS awning you inflate at one inflation point with a hand or electric pump and all the air struts fill, apart from the lower crosses. On an MVS awning you inflate each air strut individually.
Will it fit a Dorema Magnum Air awning?
No. The Magnum Air and the Magnum Air Force sound comparable but their air tubes only fit their own awning. The Magnum Air has a 240 cm depth and is MVS only, while the Magnum Air Force has a 280 cm depth.
Is it possible to repair a burst awning air tube?
A burst air tube is often not repairable, so changing the inner bladder is the usual fix. Match the position, the awning model and the fabric version, because Weathertex versions of the Magnum Air Force use a different air tube.
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If you’ve changed your mind about keeping your purchase, please return it in its original condition with proof of purchase and we’ll exchange or refund it. Unless faulty, this should be within 100 days of receiving your order. By original condition, we’d expect this to mean that you’ve kept packaging and labels, and that the item is undamaged and unused.

For further information of how to return your item, please visit the "Returning an Unwanted/Faulty/Damaged Item" section on our Help Page.
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