With respect: Water in a pipe going straight up has pressure dependent only on the height of the column, not the amount of water in the column. If so a city water tank would have dramatic pressure from the big overhead tank. A 1/4" tube will have the same static head of pressure on it as a 6" pipe, assuming the same vertical change. Putting only one check valve into a well stem (at the bottom) does all the reverse flow needed. There is no change in head from a check. Multiple check valves would do nothing but restrict the flow. Jim
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Today's Featured Article - Tractor Proflie: Farmall Model C - by Staff. In 1948 the first Farmall Model C tractor rolled out of the factory and into the farmer's field. A follow-on to the Model B, it was slihtly larger in size but kept the same 113 CID engine and 4-speed transmission. Other upgrades included adjustable rear tire spacing (with sliding hubs), a frame design similar t
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