Keith let asume that you use yum to install pure-ftp and you use---and you did not use nothing else to configure pure-ftp than chkconfig,
-----yum install pure-ftpd
now after that you create the system startup links
----chkconfig --levels xx pure-ftpd on (xx =whatever level you use)
or
----chkconfig pure-ftpd on
then or just reboot OS
----/etc/init.d/pure-ftpd start
now check if is listed
----chkconfig --list
pure-ftpd
then you command will be
----/etc/init.d/pure-ftpd stop
now using chkconf you will remove the startup link
----chkconfig --levels xx pure-ftpd off
or
----chkconfig pure-ftpd off
now that should do it,
good luck
WT