  Water fountains (WFs) are thought to be objects in the morphological
evolution of the circumstellar envelopes of low- and intermediate-mass evolved
stars, transitioning from spherically symmetric to asymmetric shapes. We used
databases of circumstellar 1612 MHz OH and 22.235 GHz H$_2$O maser sources to
search for new WF candidates using the criterion of a larger velocity range of
the H$_2$O maser emission compared to that of the OH maser emission. Thus, it
is in principle possible to identify WFs with an H$_2$O velocity ranges smaller
than those for the previously known WFs. For the OH maser line, we analyzed
database entries of 8,474 observations from 2,195 sources, and 6,085
observations from 3,642 sources for H$_2$O maser line. After a close
examination of the velocity ranges and line profiles, we identified 11 sources
that meet the criterion mentioned above. We examined the IRAS colors of the
selected sources and found that two of them (IRAS 19069+0916 and IRAS
19319+2214) are in the color region for post-AGB stars. We find that the maser
velocity criterion can discover other astrophysically interesting objects than
just WFs. Such objects may include peculiar planetary nebulae with maser
emissions and stellar merger remnants.
