We installed an Oxygenics Body Spa (link)
shower head and I can report after a three week trip that it is wonderful. Also installed at the same time was this shower head cut off valve (link).
I did a test before leaving on the trip, and found that our old Camco shower head used 1.3 gallons per minute and the Oxygenics used 1.1 gallons per minute - both were operated with fully open valves using our on board fresh water pump.
The Oxygenics head is so much more powerful and capable of rinsing than any shower head I've ever used in a trailer. It comes with a cut off valve - which really just reduces the flow to a dribble. The valve we installed is a full cut off valve, and also for any position from full on to off. I found that the Oxygenics is fully effective when rinsing when the valve is only about half open.
In short, the Oxygenics Body Spa shower head works better, and uses less water. No, I don't have any stock in the company, but I wish I did!
There's lots of advice and information in forums... sometimes it is correct. For example, all of my posts are made by a political appointee who got the job as a reward for contributions to my diesel bill.
2011 Jayco 28.5RLS; 2008 Chevy Duramax; Pullrite Superglide Hitch