Vacuums Reviews

Pump shipped to me did not work. I had to get a replacement from the manufacture. It took several hours of effort to find manufacture's phone number and another week to get replacement pump.

I bought this for a birthday gift for my husband. He's getting into wines. Well we were very disappointed. You need to pump forever and the seal does not hold. Don't waste your money. If you want the air taken out either drink all the wine or use a vacuum sealer.

Erik was right. He is not "advocating bad physics". The pressure function of this product does not preserve the ability of the wine to make bubbles after you pour it, any better than an extremely airtight stopper. See for example the Pedrini champagne stopper sold here on Amazon. So this product works, but not because you pump air into the bottle with it. It works because it lets no CO2 out. You cannot keep CO2 in solution by increasing the air pressure inside the bottle. CO2 will always diffuse out into the space above the wine. The amount of CO2 dissolved in the wine stabilizes only when there is enough CO2 above the liquid so that it enters and leaves solution at the same rate (equilibrium). The pressure of the other gases above the wine does not prevent the CO2 from entering or leaving solution. This is known as Henry's Law. An unopened champagne bottle has 3 or 4 atmospheres of CO2 gas (produced by yeast after bottling) above the wine. So unless you pump it with 3 or 4 atm of CO2 and let it sit awhile, it will never be as fizzy as when you opened it. Nitrogen and oxygen are about 10 times less soluble in water than CO2, so you would need 30 or 40 atm of pressure to get the same amount of gas into the wine!

They say there are no absolutes in this world. Well this "vacuum" refutes that theory. It is an ABSOLUTE waste of time and money. If you totally field strip it and clean it every time you use it, it is mediocre at best The little shark that came FREE with the big one was overpriced! I wish I had found this sight before I wasted my money on this pile of junk.

This vacuum picks up SOME stuff. It also spits back out a great deal. So you never actually get your carpet clean. I have had it less than a year and I hate it. I always hope it will just completely shut down so I can feel better about replacing it so soon. And the hose gets clogged really easily. You spend more time trying to make it work than getting any cleaning done. The worst part is that Shark products are not cheap. They are more expensive than a lot of reliable brands and yet Shark products get terrible reviews.

This little canister vacuum is excellent for several reasons. It is compact and has great tools. It picks up dirt, etc. great. We have 2 vacation rental cabins and I have purchased them for ease in storage and for the multi-purpose tools for when I clean upholstery, window crevices, hard to reach areas. Light and easy to maneuver. Also love the easy to dump dirt area...no bags to deal with except an occassional hepa filter.