You definitely need a stout hose as you want the oil to be at operating temperature when you extract it. I am using polyethylene tubing with a fairly thick wall. I used one of the couplers that came with the kit to get down from 3/8 to 1/4 inch size. 3/8 connects to the port on the extraction pump but is too fat to go down the dipstick tube. 1/4 will fit. Be sure to cut the end of the tube on a 45 so that if it bottoms out in the pan it won’t get sealed off.

One other thing I did with my extractor was to take one of those Brother label makers and put big numbers next to the liter marks on the vessel. It is about impossible to see the stamped in numbers. This allows you to see at a glance if you have pulled all the oil.

Also keep an eye on it and don’t let it get close to the top. You do not want to do this ever or you will flood the pump.

My newest OM642 has a hard time with emptying completely for some reason. I have had to end up pulling the plug to get the last couple quarts/liters out.

I also labeled the switch over valve VAC and PRE so that I could remember which way is which.

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The OM 642/722.9 powered family
Still going strong
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)

both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech