S3DA Design provided comprehensive plumbing engineering design services for a new residential construction project in Diamond Bar, CA. The scope included the complete design of domestic water, sanitary drainage, and natural gas systems, developed in compliance with applicable California Plumbing Code requirements and local AHJ standards. 

Our team prepared detailed plumbing floor plans, 2D riser and isometric diagrams, system calculations, schedules, and construction details to support a permit-ready submission. The design was carefully coordinated with architectural and structural layouts to ensure constructability, efficiency, and long-term performance of all plumbing systems. 

This project reflects S3DA Design’s expertise in delivering code-compliant, coordinated, and permit-ready plumbing solutions for residential developments across California.