Thanks for everyone's help with this. I'm supposed to take a 3.5 hour drive
up to Wandering Westies tomorrow so I better not take any chances. I'm going
to head up to the Bus Depot at lunch today and get a new pump AND filter.
I'm going to be driving through Pennsatucky with my 6 year old and this one
is making me nervous since the buzzing sometimes stops for awhile.  I do
carry a spare pump with me but it's a good used one, not a new one.

Thanks,
Bryan