Is there a minimum distance (recommended or code) for sch 40 pipe to be enclosed by shotcrete? I'm planning on using Waterway power storm gunite jets in a new integrated spa, which require 9 1/2" or 10 1/2" depth, depending on fitting used from the loop. Would I be get away with these in a 12" dam wall? My drawings call for a 12" dam wall, which i assume is 12" rough, 13" finished (w/tile or plaster). That would give me 3" or 2" from the back of the jet body fitting to the outside of the shotcrete.
I need to make this decision very soon - steel is going in next week - any feedback would be appreciated.