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splicing in a length of single-walled piping?

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splicing in a length of single-walled piping?

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No, the entire piping run must be replaced with double-walled piping meeting the newperformance standards. Any time a section of single-walled piping has to be replaced, the entire pipingrun must be upgraded to meet the new performance standards including double-walled construction andcontinuous interstitial monitoring using an electronic sump sensor or vacuum, pressure or hydrostatic monitoring methods.

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