FESTOOL 50mm Anti-Static Y-piece for Dual Extraction Hoses [D50 SV AS for D50 conectors] 
$110 Incl. GST.
with plug for connection of two dust extraction hoses simultaneous operation is not permissible with extractors approved for hazardous dusts
Use the anti static Y piece to connect 2 suction hoses of either 27 mm or 36 mm or 50 mm diameter to a single dust extractor for simultaneous use. Simultaneous operation is not permissable for extractors approved for hazardous dust.