This rubber boot is surrounding the water ballast control rod to avoid the water leaking through. It is used in several Schempp-Hirth gliders including the Nimbus-2, Ventus, Ventus-2c, Discus-2c, Duo Discus and the Arcus.

It is 125 x 22 x 22 mm with a 7 mm and a 16 mm opening.

Over the years, other bellows and different combinations have been used. You can find them underneath this description, in the "suggested products", if you want to compare them with the model that you wish to replace.

This rubber boot ensures the sealing of the tail ballast of most of the Schempp-Hirth gliders.
It is advisable to replace it every 2-3 years to avoid water leaks.

Its dimensions are 72 x 38 mm.

This flexible rubber boot is 63 x 39x 39 mm with a 10 mm and a 25 mm opening.

It is surrounding the ballast rod on the wing root of the Discus b, Ventus-2 (SN < 561), Discus-2a and Discus-2b (SN< 234) which have been produced before June 2009. However, some of these gliders might have been retrofitted with the newer system. You can see on the suggested product the other bellow.

It is used for the ballast system of the Nimbus-3, -3D, -4 and -4D. For the Nimbus, the bellow may need to be adapted by cutting the larger end.

It is also used as a sealing around the brake line when crossing the wheel box in all single seaters.