GrainAir Tubes are made of 18 gauge perforated galvanized steel. The Tubes come in telescoping eight foot sections and can be ordered with two (GT200), three (GT300), or four (GT400) sections to accommodate differed sized bins.

All these GrainAir Tubes come with a cap assembly.

GT 200 – up to 15′
GT 300 – up to 22′

GT 400 – up to 29′

Retractable Bases

RTB 100

The retractable base is used to support GrainAir Tubes in flat bottom bins. The GrainAir Tube is supported three to four feet from the ground. When the bin is nearly empty, the set screw can be loosened to retract the base and allow a bin sweep to run under the tube.

RTB 400

This extremely durable retractable base is used to support GrainAir Tubes in flat bottom bins that have a four section tube and/or a center unload. The GrainAir Tube is supported three to four feet from the ground. When the bin is nearly empty, the pins can be removed to retract that base and allow a bin sweep to run under the tube.

Hopper Bottom Base

HBB 100

The hopper bottom base is used to support GrainAir Tubes in hopper bottom bins. The base has telescoping legs to fit different sized hopper bins. The saddle, attached to the GrainAir Tube, connects to the base via rare earth magnets. This allows the tube to shift as the bin is unloading, reducing stress on the tube and minimizing possible damage.

Free Standing Base

FSB 100

The free standing base is used to support GrainAir Tubes in non-bin storage such as temporary grain rings, quonsets, grain piles, sheds, etc.

Tube Extensions

GT 24 – A two foot tube extension for short extension requirements
GT 24 – 24″ extension
GT 96 – An eight foot tube extension for bins that need more height than the
GT 400 can accommodate.
GT 96 – 96″ extension

Cap Assembly

The cap assembly includes the perforated cap, chains, brackets, and all required hardware.