Hello,

I have a 10yo krups xp320 espresso machine. I am looking to replace the teflon tube and tee fitting from the boiler.

My digital caliper says the tubes have 4.5mm OD. That seems an unusual size. Perhaps this is "nominal" sizing (ie like 2x4 lumber) ?
My concern is 5mm fittings will leak.

Any ideas where to find correct sized fittings ?

It's 4mm OD, 2mm ID

Ahh, that makes more sense, my measurement is wrong.