splicing in a length of single-walled piping?
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.