THE WILKINS 720A PRESSURE VACUUM BREAKER (PVB) REPAIR KIT OPTIONS FOR THE 1/2", 3/4" AND 1" SIZES.
THE OLDER VERSIONS OF THESE HAD THE TEST COCKS COMING OFF THE SIDE OF THE MAIN BODY. THE NEWER ONES, MAYBE LAST 15 YEARS OR SO THEY HAVE COME OFF THE BALL VALVES.