Heck yeah!

Correct.

This is all good advice and should get OP to get the bike up and running.

Yeah it’s seems to be something else. And oh is it bugging me now when I don’t know.

Mine seemed to be 6 cup version. It holds about 300ml of water and the gasket was 71ml in diameter :)

Filling it to the safety valve it holds little over 300ml of water. Filling it to the brim it will hold about 440ml of water.

Edit: 6 cup version seems to be 300ml in size not 250ml. Also the diameter of the rubber matches.

I’m still confused what the stamp means, even though it doesn’t matter.

I will try this. Do you fill it up to the safety valve or to the top?

You already have it. Try?