Then glue the riser into the bottom of the extension joint. Apply pipe dope and tighten the nuts onto a 90 flare fitting. Make at least two passes over the entire bed. Then lock them in place with aluminum edging. Drive 10-in. spikes through the edging.
Test fit the cut stones.
Then set them in permanently. In this case, we had to notch around the conduit riser. Frame the enclosure footing and pour the form half-full. Then use an edging tool to dress the perimeter. Finish laying the cobblestone pavers between the footing and patio.