The conduit is likely to be one on the western or Croom's Hill side of Greenwich Park, near the surviving 18th- century Standard Reservoir conduit house. All but one, at the base of One Tree Hill, were demolished before 1900. The stone slab inscribed 'GREENWICH HOSPITAL' may be the one reused as the base for the western side of the Chesterfield Gate in the south-west corner of the park.
The location was previously identified as possibly being: "the southern gateway to Trinity Hospital, Greenwich. At present (1996) there is a similar doorway, perhaps rebuilt in the twentieth century, with a lintel stone incribed with the date 1792"
The Yale Centre for British Art, New Haven, holds a drawing by Samuel Hieronymus Grimm of a similar conduit head in Greenwich Park.