Bill,
Do you have a picture or part number for the old and new tanks, I will watch for them when miscellaneous items float by, otherwise they are just chaff.
Gepetto
Hi Gepetto!
These are the pictures showing the difference between the SCBA air cylinders.

The firefighter wearing the yellow air cylinder on the left is the original one that Playmobil has discontinued, that was offered for years in the firefighting theme sets since 1996. The one on the right is the current one that is being substituted for the discontinued one. When it is used in the grey frame, it is too long, & the rubber regulator air line keeps constantly falling out of the mounting hole on the right side of the light grey harness frame without gluing it in position because the rubber air line has too much strain on it due to the wrong length of the air cylinder from the factory.

This is a comparison showing the difference between the air cylinders again. The one in the far left again is the one we like that has been discontinued, the one in the middle is the new substitution, & the one on the far right is one that I modified to work out of desperation after receiving 40 of them when I ordered the old part number, but wasn't told by Playmobil DS that they had superseded the old one! I personally DO NOT like the new style air tank! It is the air tank that is used in the scuba diving theme, but doesn't work well with the firefighting theme, & looks totally out of place in my opinion! Gepetto if you can find me any of the old style like on the far left side, let me know, & I'd greatly appreciate it!
Bill