Fluid downloader fluids not going into pipe

Is there a trick to using the Fluid Downloader in the Fluid Depot mod? I have water uploaded into the depot, and the downloader configured to download water, but no matter how long I wait, the pipe connected to the downloader doesn't receive any water.

I haven't seen anybody else post about this issue, so I'm hoping someone can help me figure out what I'm doing wrong.
Solution
Never mind, didn't realize the downloader required power. It is working fine now.
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