About compress in pg_dump

To backup  a database  I do:
 nice -n +19  pg_dump -Fc  database | nice -n +19 gzip --rsyncable   -nc >
database.dump

If -Fc  option  is compressed  by default  I dont need gzip the backup,
but I need pass --rsyncable  and -n options.

How can  I pass  gzip options  to compress in pg_dump?

if not   I will use :
nice -n +19  pg_dump -Fc -Z 0 database | nice -n +19 gzip --rsyncable   -nc
>  database.dump
but I dont want to do that. :)

Thanks   for your help...

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