redrain

Verb

redrain (third-person singular simple present redrains, present participle redraining, simple past and past participle redrained)

1. (transitive) To drain again.
   • During the track renewals, advantage was taken to redrain the area and the old spent ballast was removed down to the underlying rock, new ballast and drains being provided throughout.1950 January, “Re-Signalling at Liverpool Lime Street Station”, in Railway Magazine, page 43