Multi-Story Building Water Distribution Riser Diagram with Dual tank System

Potable Water Distribution System Overview

This riser diagram illustrates a comprehensive water distribution system for a multi-story building with dual water storage solutions. The system features two stainless steel water tanks: a 600-liter vertical tank at ground level and a 600-liter horizontal tank positioned at roof level, creating a gravity-fed distribution arrangement.

Key Components:
– 1½” ID PPR upfeed supply riser connecting from the water source to the rooftop tank
– 2″ ID PPR water line downfeed from the rooftop tank serving multiple floors
– 0.5HP booster pump at ground level to ensure adequate pressure
– Bypass line for system redundancy and maintenance operations
– Multiple isolation valves at critical junctions for sectional control
– Control valve (CV) and pressure regulating valve (PRV) configuration
– Pressure switch (PS) and pressure gauge (PG) for monitoring system performance

The design incorporates separate distribution branches for both building use and rentable spaces, with dedicated isolation valves for each service category. The diagram clearly shows the relationship between the water distribution system and building levels, including natural grade line, finish floor line, second floor line, ceiling lines, roof deck line, and roof apex line.

This system employs PPR (Polypropylene Random Copolymer) piping, which offers excellent resistance to pressure and temperature variations while maintaining water quality—an essential consideration for potable water applications.