Electric Pump That Can Do 10inHg?

I have two whisper pumps and even the 100gal only pulls 7 inches Hg. Is there any cheap pump similar to these that can produce more suction?

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The electric ones definitely go above 10

I bought two different tubes, one with a built-in pump, one with a pendant pump, both USB. Both pulled close to 11” Hg no matter what the setting was; the lower settings just took longer to reach that level.

My “whisper” aquarium pump pulls 3.6” Hg. The Spectre S2 breast pump pulls just under 2” Hg… but that’s dependent on tube and hose volume since it runs for a short period, dumps all the vacuum, then starts again. Just shortening the hose was worth .5” Hg; a shorter tube would bring it up much more.

Note you can “stage” pumps together; two 7” aquarium pumps in series would probably give you 12-13” to play with. (you won’t get a full 14” due to efficiency losses, but it’ll be reasonably close) This won’t work with a regulated pump, just a “dumb” pump like an aquarium pump.