SP Bel-Art Vacuum Aspirator Polyethylene Pump with Quick Disconnect Hose Fitting (F32947-0000)

This thing is useless. I added a T adapter to the cold water supply to sink and ran PVC tubing from it to a valve for supply regulation and then to the aspirator. Water always travels against the vacuum and into filter flask, I have to turn the flow down to a trickle basically to not get water flow through the vacuum inlet. I don't think it even pulls a vacuum. Waste of money, and I spent another 40 for the water line supplies.

Worked very well, better than the stainless steel one bought at the same time.Easily got 25inHg vacuum. Ordering more.

I can’t believe I spent almost $30 on this ripoff product! All of the negative reviews are justified! This thing is rather small, which isn’t apparent in the photos, and cheaply made. Not surprisingly, it doesn’t work at all using the water flow rate recommended on the enclosed spec sheet. I bet this thing only costs a few pennies to manufacture with an outrageous markup. Come to think of it, it did do a great job profitably vacuuming money out of my pocket for the seller! Save your money and stay away from this product!

Got it to work at 11 PSI after fixing cracked housing for vac takeoff which I probably caused. Worked great with city water pressure (55 PSI max). With one pump, I had to submerge it to get it above single digitsbut then it took right off and did -28" Hg continuously. With some more adjustments, got a -29.3" Hg with a 25 PSI max pump

This thing pulls absolutely no vacuum at all. I tried various flow rates and other stuff and nothing still. Waste of money

Those complaining must have been expecting a 2 stage rotary vane pump performance. These work perfect for what they were designed to do. Vacuum filtration and reduced pressure distillation are smooth with this lil pump. I recommend installing a 1 gallon glass jug vacuum reservoir for a steady pull and to catch and bumping splash back or unexpected boil overs.

Not sure I like this. The pressure is quite low using a diaphragm pump. On a sink I needed to turn both cold and hot even though the water pressure is very high. The water main should have a pressure regulator it's so high. The extension tube for water output causes water to get in the air line, so that is useless. Otherwise it did get to 27.5Hg as it states. I just don't plan on distilling with this hooked to a sink. Need a better solution.

Back flow preventer ball is permanently in place. No air flow into the aspirator. Doesn't work so not the the price at any price.