S.R.Smith ROGUE GRAND RAPIDS Assembly And Installation Instructions Manual page 9

13) Apply PVC glue to the male slip end of the (#7) PVC Thread Adapter and insert
into one side of the (#3) PVC Union. Be sure to push the thread adapter as far
as it will go into the union. See Figure 10.
14) Apply a small amount of silicon sealant to the male thread side of the (#3) PVC
Union. Thread the PVC Union into the elbow from step 12 and hand tighten until
snug. See Figure 11.
9
Figure 10
Figure 11