Abstract: A telescopic support tower has a plurality of tubes nested or stacked with one another. A base is coupled with the outermost tube to stand the plurality of tubes transverse to the base. A mechanism is provided in the base to enable access to an interior space of the plurality of tubes. The mechanism is coupled with a source of compressed air. A plurality of seals, at least two, are positioned on each of the adjacent tubes to seal the tubes with respect to one another. The plurality of seals enables sealed sliding movements of the tubes with respect to one another. At least one first clamp is provided to prohibit movement of selected tubes of the plurality of tubes such that only one tube of the plurality of tubes is enabled to telescope at a time. At least one second clamp fixes the selected telescoping tube to an adjacent tube of the plurality of tubes.