On Mon, 8 Jun 2015 02:55:21 +0000 (UTC), danny burstein
wrote:



You didn't say how large the basement is, but let's
call it 20 feet by 40 by 5 feet of water.

That would be... 4000 cubic feet - 30,000 gallons.

At 20 gals/minute that's 1,500 minutes, or 25 hours.

[a] that was the number listed on our unit's box. And while
I haven't actively confirmed it, that certainly looks
about right.

If you have that much, call the fire department. In some towns they
will pump it out for you.