Outdoor shower valves

[Zimm0who0net]

So I'm wanting to put in an outdoor shower next to a CMU retaining wall I'm currently building. Most of the ones I've seen have simple individual valves for hot and cold. Like this:

How does this not violate IRC P2708.4 (the code requiring pressure balancing mixing valves, etc). I don't see an exception for outdoor showers, yet I see these things EVERYWHERE down here in southern arizona.

Anyway, I have to say I like the rustic look of the photo above (not sure I'd do it wall ball valves though), but I also don't want to violate code as this will be inspected. If it comes to having to follow P2708.4, does anyone know of a mixing valve that's not ugly and doesn't cost insane money? (believe it or not, the one pictured above costs $1500). I'm thinking I could whip something together with some Type L copper and some elbows that looks basically the same.

Oh, and as I mentioned I am stacking the CMU retaining wall now, so theoretically I could run the plumbing inside the wall and maybe put some sort of recessed mixing valve in. That's not my preference, but spending $1500 is also not my preference.

 

[Zimm0who0net]

Not to step on my own post, but apparently this shower is pressure balanced:

How? Is the T connecting the hot and cold some sort of voodoo magic? Is there a supplier for this mystery sweatable pressure balanced valve? Here's a link to the web site (https://www.sonomaforge.com/exposed-showers.html#floor) (don't look at the prices....yikes)

 

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[Marlinman]

Precision Plumbing Products makes one called Tempra. They are available online or plumbing supply house.

https://www.pppinc.net/products/the...re-balancing-valve-12-fpt-trb-2-tcp-2hls.html

 

[Zimm0who0net]

Interesting. I guess I hadn't considered balancing upstream of the valves.