I have 2 Jabsco heads aboard. I have had them for over 10 years with relatively minor issues. I found them more reliable than the Raritan PH and PHII I had on previous boats.

The Jabsco head works great and is very inexpensive to buy-- about $130 or so on sale at Worst Marine. Also, when I did have a problem their customer service, now based in Gloucester,MA, was excellent!!

I would not hesitate to recommend the Jabsco manual head.