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Abstract. Yields of sugar maple sap collected from three plastic pipeline systems by gravity, vacuum pump, and a vacuum pump with a transfer tank were compared during 2 years in northern Vermont.The transfer system yielded 27 percent more sap one year and 17 percent more the next year.Higher vacuum levels at the tapholes were observed in the transfer system.he transfer system yielded 27 percent more sap one year and 17 percent more the next year. Higher vacuum levels at the tapholes were observed in the transfer system.
A canister type of vacuum cleaner with poor suction typically will measure around 70 of water lift while the most powerful ones measure around 103 of water lift. As you can see, it really isn't such a marvel that an average vacuum cleaner can lift an adult person.