Microline New Manifold S2128-03M used since 1999.
And matches design used since 2005.
Newer part number S2128-M or SNFSTF0405M38We usually have one in stock.
Not compatible with Older versions ( pre-1999 ) that had a large black nut that screwed on each filter sump housing to the manifold.
The thread pitch different and that is why it will not work.
This newer style ( since 1999 ) has no nut,
and the sump housing screws directly to the manifold.
Note: O-rings used with sumps housings sold separately.