Rough-in box and control valve still needed? or just this + shower head/hose set will work?

There are no additional rough ins needed. You just need the Hand shower set-up.

If i don't want to use the handheld and just use the rainfaill showerhead is it possible to not have a handheld?

This shower valve and temperature mixer has one water outlet, a 1/2" NPT connection (shown on the lower side right of the image I'm seeing). Since this connection is exposed, most people would connect it to a handheld, but really, what it is connected to is up to you. This valve/mixer does not have a feature to switch between two shower heads, such as a handheld and a rainfall showerhead. Here is the specifications page for this valve at the Grohe website: https://www.grohe.us/en_us/grohtherm-1000-thermostat-shower-valve-34150003.html

These appear to not fasten to the wall in anyway....only attaches to the water lines. If your water lines wiggle will this faucet wiggle too?

Yes, the valve will "wiggle" too if the water lines wiggle. This valve is made to attach to 1/2" FPT fittings that are well-secured to the shower wall and spaced out at 150mm plus or minus about 14mm (about 9/16 inch), which is plenty of slop-room.

What size is the inlet pipes

Standard size. Check with a plumbing supply house, they can tell you. Mine went in perfectly and my plumbers had never seen them before. They are great!

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Description

🚿 Elevate your daily ritual with precision, safety, and style!

ECO FRIENDLY LUXURY - EcoJoy reduces water consumption by up to 50%, saving resources and bills.
SAFE COOL TO TOUCH - GROHE CoolTouch technology prevents burns, perfect for all ages.
SLEEK DURABLE DESIGN - Starlight Chrome finish resists scratches and tarnish for lasting shine.
ERGONOMIC METAL GRIP HANDLES - Comfortable, easy-to-use handles designed for effortless control.
PRECISION TEMPERATURE CONTROL - TurboStat ensures your shower temp stays steady within seconds.

The GROHE 34150003 Grohtherm 1000 is a premium 2-handle thermostatic shower valve trim featuring GROHE’s CoolTouch technology for safe handling, TurboStat for rapid and stable temperature control, and EcoJoy for water efficiency. Finished in durable Starlight Chrome with ergonomic metal handles, it combines cutting-edge performance with sleek design, ideal for modern bathrooms and all user ages.

Specifications

Brand	GROHE
Recommended Uses For Product	Bathroom
Mounting Type	Wall Mount
Finish Type	CHROME
Material	Metal
Color	Chrome
Number of Handles	2
Included Components	Shower Faucet Grohtherm Thermostatic Valve and
Style	34150
Installation Type	Wall Mounted
Model Name	34150003
Handle Material	Metal
Spout Reach	3.06 Inches
Item Weight	16 ounces
Warranty Type	limited
Manufacturer	Grohe
Global Trade Identification Number	04005176309663
Part Number	34150003
Item Weight	1 pounds
Product Dimensions	16.14 x 4.72 x 3.15 inches
Item model number	34150003
Is Discontinued By Manufacturer	No
Finish	CHROME
Shape	Round
Item Package Quantity	1
Batteries Included?	No
Batteries Required?	No
Warranty Description	LIMITED

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