Then it would seem to be advisable to add the inlet filter even if the high
pressure side filter is already there and functioning well.  Crud coming
into the pump couldn't be a good thing, even if the larger filter on the
other side takes it out before reaching the injectors.

Anyone know if there is only one inlet side filter in a "one-size-fits-all,"
or could you advise us Filterless Ones of what models are available if it
matters to have the right specific type?  (please pardon my laziness in not
wanting to search the vendors for what they list).

Thanks,
Jim