A trap primer tube connects to a P-trap assembly featuring a slip joint nut and seal, a ground joint connection, and a female NPT outlet leading to a wall tube. The assembly passes through a finished wall secured by wall escutcheons and a compression fitting on the primer line. Recommended rough-in dimensions show a three-inch vertical spacing and a one-and-three-quarter-inch horizontal offset between the one-and-a-half-inch waste pipe and the half-inch primer tube.
RECOMMENDED ROUGH-IN SLIP JOINT NUT AND SEAL WALL TUBE AND ESCUTCHEON FEMALE NPT OUTLET WALL ESCUTCHEON COMPRESSION FITTING PRIMER TUBE GROUND JOINT CONNECTION FINISHED WALL P-TRAP 1-1/2" (38) WASTE 1/2" (13) PRIMER TUBE 3" 1-3/4"
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