How to tell the difference between xSystem versions

Identifying the differences between xSystem versions

Serial Number Range

Up to X-010399 is an xSystem 1

From X- 010400 to X- 021209 is an xSystem 2

From X-021210 to X-023888 is an xSystem 3 

From X-223889 onwards is an xSystem 3+

(Please note: There are xSystem 2 remanufactured systems between serial numbers X-017131 to X-023429)

Visual Identifier

xSystem 1.0

The xSystem 1.0 has a black cover on the top side of the reservoir. 

The install should have a check valve fitted

xSystem 2.0 Identifier

This part on the reservoir has been extended. Previously there was a black cover in this place. Now this is part of the reservoir and clear.

The install will NOT have a check valve as it is no longer needed.