Thermostatic mixer/diverter/flow valve.
I am installing a fixed shower head and a hand shower unit in my new shower. I know I will need a 3 port diverter to switch between the two. If I use a thermostatic or pressure balance mixer, like the Hansgrohe Axor Carlton, do I need a flow valve, also? I really like the look of these single-handled units!
Flow valve for Hansgrohe Axor Carlton
Hansgrohe offers several solutions to your question.
The thermostatic valve you want to use mixes the water only, so you need flow control also. For a showerhead and handshower setup you can use the Thermo valve with their Triostop diverter which allows you to control flow, divert to either, or share both on at the same time. Then you only have two handles to deal with.
The second solution is to use a volume control valve for the shower head, and a Fix Fit wall outlet for the handshower. The Fix Fit outlet controls flow for the hand shower. The nice thing is that if you are putting the handshower near a bench (the ladies like this for shaving) you will have the flow control at the hand shower in easy reach of the seated bather.
Options for shower controls - AXXOR
I personally don't like the fixtures that have so many options. Many allow you to control for example a Rain Head and a Hand Held - one or the other and sometimes both.
Standing under a Rain Head pumping water out full blast is not so nice as a gentle drizzle. Have separate flow valves give you this option.
If you can not control the flow rate of the rain head you may not use it that much....
Here you see the AXXOR set up with two flow valves and one Thermostatic Control that holds the hand held.
A gentle stream of water from the Rain Head. This can be set really so it barely flows and is nice in a steam shower to turn on to cool off.
Or crank it full blast to wash your hair!