A system, apparatus, and method for making and implementing non-metallic fittings with non-metallic tubulars for high-pressure fluid transport. The apparatus includes a fitting formed from a body of non-metallic material that is tunneled and configured to receive non-metallic tubulars at standard and custom angles. The system includes multiple non-metallic tubulars and fittings that can be arranged at standard and custom angles, and, in some instances, be customized by pressure along the length of the transport line. Some of the fittings in the system can be hot-tapped. The methods include manufacture of the fittings and system and performing calculations to achieved selected pressure ratings.