The Raritan PH SuperFlush is the current version of their tried and true PHII toilet. It still uses the PHII pump, but Raritan redesigned the base to match mounting bolt pattern for Jabsco and almost all other manual toilets. However, there are a couple of other issues that have always been common to the PHII pump: 1. unlike most other manual toilets, the flush water inlet fitting is on the FRONT of the pump...your flush water intake line may not be long enough. 2. It's shipped with 90 degree discharge fitting...depending on the the route your discharge line needs to take to your tank, you may need to request a straight or 45 fitting. Bottom line, there are a couple of PITA installation issues, but Raritan tech support is VERY supportive (800-352-5630) and once it's installed you're gonna LOVE it, 'cusz it only needs half the pump strokes to move twice the volume. Keep it well lubricated, replace the joker valve annually, put a rebuild kit in it every 5-6 years and it'll provide at least 20 years of reliable trouble-free service.
--Peggie