Sinking head

(Founding) a riser from which the mold is fed as the casting shrinks. See Riser, n., 4.

See also: Sinking

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Tenders are invited for Carbide Indexable Insert 90 Degree Included Angle Non Centre Cutting Chamfering And Counter Sinking Head Dia 16Mm X Non Centre Cutting Dia 3Mm X No.
If the Wye is carrying extra water an alternative to spinning is to use a sinking head line and a heavy tube fly to get down into the water and a Willie Gunn pattern is a favourite on the river.