The Man With The Measuring Line Reveals More of the Heavenly Temple (Ezekiel 46:19-24).
The account now suddenly picks up abruptly with the heavenly visitant continuing to reveal the heavenly temple as though nothing had come between. That this is so is clear from comparison with Ezekiel 47:3, and in fact this section could easily be picked up and fitted between Ezekiel 42:14 and Ezekiel 42:15, and it would not be out of place. (It has even been suggested that that should happen, but then we would lose the vital connection of chapter 47 with the heavenly tour).
But apart from the suddenness of the introduction as though we were continuing the tour of the temple without interruption, there is no reason for removing it. And that is not sufficient reason. To a man like Ezekiel, suddenly moving back into his earlier vision as though he had not left it was typical of his visionary state. He could suddenly pick up where he had left off, as though nothing had come between, because that was how his vision went. In a moment he was there. It needed no introduction. It was as though nothing had intervened.
On the other hand there is good reason for the section being here. It illustrates what has just been said about sacrifices and offerings and applies it to the heavenly temple, demonstrating that it is all consistent with it. These boiling houses would never be used, but they were a heavenly justification for their earthly equivalent. But even more importantly it brings us abruptly back into the tour of the heavenly temple so as to incorporate chapter 47 into the same heavenly vision, as though without interruption.