Inline filter tubing size

[arvind]

I use 1/4" standard tubing with my Kh director. The inline water filter nozzles appear to be too big for the tubing. What size tubing nshould I be using for the water inline filter?

[Thilo]

The tube delivered with the KHD fits on the filter. The nozzle appears a bit too big, but the tube can be squeezed over it.

[arvind]

The tube delivered with the KHD fits on the filter. The nozzle appears a bit too big, but the tube can be squeezed over it.

I no longer have the tubing that came with it. Can you tell me what ID size of the tubing that comes with the doser?

[Thilo]

The inner diameter of the default Doser tubing is 4mm.