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$73.99
WATERTWIN-PRO Adapter for Fuel Cap 3-Pin D: 78 with Filter | Water Tank Cap Compatible with Gardena Connection | Motorhome Caravan Water Filler Nozzle Filling Adapter for Water Hose — image 1
Fuel System ToolsMaJoCompTec✓ In stock

WATERTWIN-PRO Adapter for Fuel Cap 3-Pin D: 78 with Filter | Water Tank Cap Compatible with Gardena Connection | Motorhome Caravan Water Filler Nozzle Filling Adapter for Water Hose

$73.99
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About this item
  • Wadowwin-pro: suitable for filling nozzles whose fuel cap has 3 locking pins and an outer diameter of 78 mm. Please check before ordering – there are different sizes
  • Connection with system – with this water filling aid, you can be sure that your filling hose stays where it should go - at the tank connection! No more annoying fixing of the filling hose necessary - no nasty surprises when the hose falls out of the water filler neck to the ground and makes itself independent
  • Clean safe: the water filters of the Watertwin Pro series filter dirt particles, suspended matter and impurities from a particle size of 0.15 mm from the water. For cleaning, the coarse dirt filter is rinsed with water from the opposite side and is therefore always ready for use without disassembly. Our tip: with a cotton swab, stubborn dirt can be easily removed
  • Integrated double coupling – after completing the refueling process, the two connections of the water hose are attached to the integrated double coupling. The tank hose is now closed - it can tile residual water into your vehicle and no vermin in
  • Easy to use: Watertwin-Pro water tank adapter only slightly tighten/put on - the adapter does not snap into place. Insert the tank adapter with the overflow so that it is in the upper area. With strongly curved filler nozzles, it can cause backflow when filling with a strong water jet, which allows the water to escape from the overflow. In this case, plug the supplied short hose piece onto the internal connection or reduce the water supply
  • From a clamp for tamper – all our adapters can be found here: B091B4VLPZ (enter the search field) – made in Baden-Württemberg/Germany – by CAMPER for CAMPER powered by MaJoCompTec
  • Box contents: 1 x Tec4Camp Watertwin Pro adapter for fuel cap 3-pin D: 78, 1 x coarse dirt filter, 1 x replacement filter, 1 x twin connection, 1 x short hose extension, 1 x note sticker, accessory set to choose from. Please note: Thanks to the durable flat surface, the Watertwin does not require a rubber seal
Product description

MaJoCompTec Watertwin compact and robust water tank adapter with connection suitable for the Gardena system with integrated plug double coupling for convenient and hygienic filling of your fresh water tank. With this water filling aid, you can be sure that your filling hose stays where it should go - at the tank connection! No more annoying fixing of the filling hose necessary - no nasty surprises when the hose falls out of the water filler neck to the ground and makes itself independent. When the tank is full, the excess water will escape through the overflow of the filling adapter. You don't need to worry about overpressure in your water system. After completing the tanking process, the connections of the water hose are attached to the integrated double coupling. The tank hose is therefore closed - no water can leak out and no vermin in. Suitable for many motorhome and caravan types. Please compare with the pictures before ordering and select the Watertwin water tank adapter that matches your tank cap. Operation: Watertwin water tank adapter only slightly tighten/put on – the adapter does not snap into place. Insert the tank adapter with the overflow so that it is in the upper area. With strongly curved filler nozzles, it can cause backflow when filling with a strong water jet, which allows the water to escape from the overflow. In this case, plug the supplied short hose piece onto the internal connection or reduce the water supply. Please note: Thanks to the durable flat surface, the Watertwin does not require a rubber seal. Box contents: 1x MaJoCompTec Watertwin-PRO adapter for fuel cap 3-pin D: 78, 1x coarse dirt filter, 1x twin connection, 1x short hose extension, 1x note sticker, accessory set to be selected. The filler nozzles, tank caps, Gardena plugs and hoses shown in the pictures are not part of the delivery. They are only used to show the function and to compare the original sealing lids. Disclaimer This filler adapter is only approved for filling water for the fresh water tank on RVs and caravans. Before filling, the correct fit of the adapter on the filler neck must be checked and ensured. The responsibility for the filling process lies exclusively with the user of the filling aid and should be monitored during filling. No chess or personal damage due to misuse will be assumed. The adapter is not suitable for filling fuels, solvents or flammable liquids of any kind. Warning: the adapter is not suitable for filling fuels, solvents or flammable liquids of any kind!

Product details
Brand
MaJoCompTec
Manufacturer
Manufaktur3D
Material
Rubber
Colour
WATERTWIN-PRO with filter
Size
3-Pin D:78
Weight
0.06 kg
Model number
WTA78.1-F-B
Part number
WTA.1

Customer reviews

What customers say about Bigamart

10 Trustpilot reviews total, with 2 shown at a time.

Trustpilot
Excellent
4.5 average rating
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S
Sigalit
🇮🇱 · January 2026

I wrote to Bigamart's customer support and they accompanied the process of reshipping the item until it finally arrived. I felt a genuine effort to solve the problem till it was finally solved.

V
Verified buyer
🇦🇺 · November 2025

The package was here in Australia from England in a few days — so quick! Something was missing and they refunded it straight away. Pretty happy with these guys.

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