Does anyone know the distance the waterline of pool should be to the coping. I am re doing the deck around the pool and I am putting two layers of travertine around pool edge. First stone is a 3x12 layer it is getting adhered to the bond beam then pouring concrete up to that and around bond beam. second stone is a 12x24 bullnose and is getting thinset to the 3x12 and concrete. This will bring waterline about 7 inches from top of bullnose. Is there a national or state guideline for height of water to the bull nose. I have searched Internet and could not find it in ANSI/NSPI-5-99.