Reduces diameter of tubing coming out of a tank pump from Ø 10 mm (3/8'') to Ø 6 mm (1/4'').
To connect three PVC tubes, one Ø 6mm int. (1/4") and two Ø 10mm int. (3/8").
For connecting the AC condensate tank outlet to a mini pump detection unit. Inlet and outlet : Ø