[Regarding] a barrel that is full of tahor beverages and a siphon is in it, [which is] surrounded by a sealed cover and placed under the same roof as a corpse, Beis Shammai say: The barrel and the beverages are tahor, but the siphon is tamei. And Beis Hillel say: Even the siphon is tahor. [Subsequently,] Beis Hillel reversed [themselves] to rule in accordance with the view of Beis Shammai.