Artefact Description: Cuboid valve block with stopper large hole in middle all faces except sides and inside dark brown glazed, stopper has square handle and a lead circular structure in middle of handle lead inscribed; inscribed on top face raised letters on front
Initial identification: acid piping valve
Material: earthenware & lead
Inscriptions, makers marks etc: Top = RGF 53, 7; front = Hathernware; lead = 7
Context or Associated Features: Recovered from cana; fill south of acid factory
Recovered during/by: Decontamination of canal by mechanical excavator
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