Portable Chiller for ICE COLD Showers for Wim Hof cold exposure - Part 4: Connecting the Shower Head

In this video I show you how to assemble the parts that connect the shower head with the heat exchanger. This involves various fittings and hoses.
In case this is your first time here, the "problem is that the showers in the summer in the Piedmont of the Carolina's are over 80F (that's 27C), so NOT cold!! My solution is to use a cold reservoir and pipe the fresh water source through a heat exchanger which pulls heat out using the cold reservoir. I've been running a built-in cold shower machine for years, and I'm finally building-out the portable version. I bought the parts for the build, but never (until now) did anything with them.
This is the fourth in a multi-part series that I plan to complete by the end of May 2024.
This video enumerates the parts required to connect a standard "2-in-1 shower system" to the heat exchanger. This kind of shower system has a "diverter", that sends water either to the handheld nozzle or to the nozzle on the wall. There's probably many ways to do this plumbing, but I selected garden hose fittings on the heat exchanger and so use garden hoses to connect the shower head. But we need to get from the 1/2 threaded fittings on the shower system to the garden hose fittings. That required PVC fittings and some PVC glue.
At the end of the video I show putting some sealer on the cement boards we worked with last time. This is to prevent so much mold from forming on those boards. The problem is that there's always condensation on the boards, and that attracts mold. I suppose I could maintain it better by occasionally spraying bleach on it, but I'm lazy about stuff like that.