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Up through the 1950's, most plumbers were smart enough to build in water hammer arrestors. On a lateral inside a wall, a tee was installed with the center fitting oriented vertically. A 3 to 4' length was then installed with a cap at the end of it. When filling the system, that vertical leg would trap air and form a water hammer arrestor. As cheap as Bill Levitt was, he did that in the thousands of Levittown, PA homes, and they worked just fine.
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There ain't nothin' more powerful than the odor of mendacity -Big Daddy
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