I've often wondered if this is a "full vacuum". Once the vacuum is made and the water is held in place, the guage shows only 1 or 2 inches of vacuum..I noticed on 1 aquarium site some one wanted to raise sea-horses in a vacuumed aquarium and asked if the "negative pressure" would effect their[seahorses] health. He had been looking at the tunnel and was considering building something along these lines.
The 30 inches on refrig. gauge is inches Hg, or mercury. An antique scientific barameter works like your inverted fish tank. A closed ended full tube of mercury is submerged into a pool of mercury. Gravity pulls the mercury down, and a void of "lesser pressure" is created atop the column of Hg.
well done. i have one suggestion. if you were to place the valve on one corner of the tunnel, and tip the same corner up upon drawing the air out you would get more of the air out, so as when you level the tunnel the water line would be higher. my two cents worth.
The amount of vacuum applied will depend upon the volume of water being raised.
It would take very little vacuum to suck water 10' up a straw but much more would be needed for say a 4" pipe.
state8citizen 2 years ago
I've often wondered if this is a "full vacuum". Once the vacuum is made and the water is held in place, the guage shows only 1 or 2 inches of vacuum..I noticed on 1 aquarium site some one wanted to raise sea-horses in a vacuumed aquarium and asked if the "negative pressure" would effect their[seahorses] health. He had been looking at the tunnel and was considering building something along these lines.
My fish all seem to thrive in this set-up.
romaurie 3 years ago
The 30 inches on refrig. gauge is inches Hg, or mercury. An antique scientific barameter works like your inverted fish tank. A closed ended full tube of mercury is submerged into a pool of mercury. Gravity pulls the mercury down, and a void of "lesser pressure" is created atop the column of Hg.
birdwing98 3 years ago
well done. i have one suggestion. if you were to place the valve on one corner of the tunnel, and tip the same corner up upon drawing the air out you would get more of the air out, so as when you level the tunnel the water line would be higher. my two cents worth.
galileefish 4 years ago
refrigeration "schreider-valve" adapted to seat on the glass with a garden hose connector.
romaurie 4 years ago
If you please;
What kind of valve is that you're using to create a vacuum?
Can it be done with thick acrylic?
pnklfd98 4 years ago