[mseepman]

I actually am using Spa flex already between the union and the pump and also between he ball valve and the pump.

If you are looking for the spa flex....go to a spa company...they stock it. The black is more flexible but their technicians will tell you that they can't use it in salt pools because it breaks down...thus the white makes sense.

The walls are coated with three coats of a marine varnish. We used a pre-coating material that resulted in the grain rising and so had to sand it several times between coats. Its still not smooth, but its well coated.

The benefit of doing the walls like this were that I can hang anything anywhere and I can remove sheets if I need to get to the plumbing in the wall.