Okay, so we just now guess about everything. I do not think that will get you help. We need oictures for sure, s to scale plan is always helpful and info as to how this connects to the water either a pool or the sea.

We had a 6’ x 6’ outdoor shower installed in a corner created by garage and house. Shower is connected to outdoor spigot with hoses for both hot and cold. The 2 perpendicular walls are pre-made with one wall containing the hinged door. The shower floor is a Trex 4’ x 4’ set on a bed of pea gravel allowing water to go straight to the ground. I added solar lights to the top edges of the walls for evening showers. We live on a lake and the outdoor shower keeps sand out of the indoor plumbing. I’m sorry I don’t have a photo available to show you. During winter, the connections to the shower are removed, turned off, and shower head and controls are removed. Can’t wait until the weather warms up to use it again.