In Nodvin v. Plantation Pipe Line Co., 204 Ga. App. 606, 612 (4) (420 SE2d 322) (1992), the Court rejected the contention that the pipeline easement was void for being vague and indefinite, noting that the location and size of a pipeline becomes certain once the pipe is placed in the ground and used with the acquiescence of both the grantor and grantee. Nodvin, 204 Ga. App. at 612 (4). Nodvin addressed the validity of the easement in the first instance, not whether the subsequent replacement of the existing pipeline with a larger one would impermissibly expand the physical boundaries of the easement.