The vertical float switch for the StormPro pumps have a 6-1/2" differential, so they will only pump out between 6-1/2" - 7" of water no matter what height you clamp it down at. For more control on your pump run time, you might consider the Pro Series - Standard Controller System w/ Dual Vertical Float Switch, model DFC1 which will activate the pump for 10 seconds once the float drops to it's original position or the Pro Series - Deluxe Controller System w/ Dual Vertical Float Switch, model DFC2, which gives you the option of setting your pump run time from 5-45 seconds once the float drops to it's original position.
The StormPro pump does not provide for a manual override switch. If you wish to use the pump manually, you simply remove the vertical float switch and plug the pump into your AC outlet direct.
The discharge port on the BA-50M is a 2" female NPT.
The float switch is, as all are required to be, mercury free.
You can access the operation manual
HERE.
We do sell to government agencies however, we do not accept PO's for payment.
If you have additional questions, please let me know.