HRL is correct on that though. There ARE draft tubes that have a screw type filler cap on them. I have one. The purpose of the filler cap? Can't say.
Thinking about it though, I suppose you could fill oil through this type draft tube. Wouldn't it make a mess though? Some of the oil would go straight through, would it not?
Last edited by kades51; 02/04/2022 3:06 PM.
