You can download the Crown
Head from here
Raritan Crown Head Owners Manual If you can't find the info you need in it, call
Raritan tech support...800-352-5630 and select "tech support." Unlike tech support at most mfrs, a live trained tech will actually answer the phone!
Should have mentioned... There have been several incarnations of the Crown
Head...the CD (centrifugal discharge) version is the most recent, but that still makes it 25+ years old. If yours is an earlier STD or DD version, I can find the owners
manuals in my hard copy files.
--Peggie