  Schubert polynomials are distinguished representatives of Schubert cycles in
the cohomology of the flag variety. In the spirit of Bergeron and Sottile, we
use the Bruhat order to give $(n-1)!$ different combinatorial formulas for the
Schubert polynomial of a permutation in $S_n$. By work of Lenart and Sottile,
one extreme of the formulas recover the classical Pipedream (PD) formula. We
prove the other extreme corresponds to Bumpless pipedreams (BPDs). We give two
applications of this perspective to view BPDs: Using the Fomin-Kirrilov
algebra, we solve the problem of finding a BPD analogue of Fomin and Stanley's
algebraic construction on PDs; We also establish a bijection between PDs and
BPDs using Lenart's growth diagram, which conjectually agrees with the existing
bijection of Gao and Huang.
