I tore out my shower insert and am putting in a tile shower. The walls of the tile shower will be closer to the studs than the old one, so to comply with the installation of the new shower valve, the supply lines are about a 3/8 inch off where they need to be to remain perfectly vertical. There are soldered fittings just above the sill, about 42 inches away from the valve, that connect the source lines to feed lines for the shower. There is also play in the lines that allow me to push the lines a little off vertical to connect to the new valve. Is this compliant with good practice and code, or am I forced to solder in new fittings to keep the supply perfectly vertical?