Digital BW, The Print

Thank you so much Richrad,

I will follow these suggestions before ordering the pump today. I'll let you know this week 
how it all flushed out.

Best,

John
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My closing suggestion is to get as close to the pump intake as you
can, insert fluids there and see if anything comes out the other side
when you actuate the pump. That eliminates the question of whether
it's a plugged up tube or points to a problem with the pump itself.
Keep in mind that if the pump is full of gunk, it may not necessarily
be defective; just clogged.

In either event, if you're working directly at the input and output
ports of the pump and nothing happens when you actuate it, or after
you've then filled it with some clog-busting fluid, let it set a bit
and tried again, then you've probably done all you can (unless you
want to attempt dissassembly of the pump itself) before replacing it.