An overview of the basic components and functions of plumbing systems including pipes, fixtures, valves, and fittings.
Introduction to Plumbing Systems
Designed for students, apprentices, or anyone new to building‑services engineering.
| Aspect | Description |
|---|---|
| Definition | A network of pipes, fixtures, and fittings that delivers water for domestic, commercial, or industrial use and removes waste water. |
| Primary Functions | 1. Supply – Bring clean (potable) water to fixtures. 2. Distribution – Provide adequate pressure and flow to each outlet. 3. Drainage – Carry used water and solids away safely. |
| Typical Sub‑systems | • Water Supply (cold, hot, and sometimes mixed) • Ventilation (air‑flow to prevent siphoning) • Sanitary Drainage (waste & sewage) • Storm Drainage (rain‑water) • Gas Piping (where applicable) |
| Component | Function | Common Materials |
|---|---|---|
| Pipes | Transport fluids; must resist pressure, corrosion, and temperature. | Copper, CPVC, PEX, PVC, Galvanized steel, HDPE |
| Fittings | Connect, change direction, or terminate pipes (elbows, tees, couplings). | Same material as pipe or compatible alloys |
| Valves | Control flow (on/off, throttling). | Ball, gate, globe, check, pressure‑reducing |
| Fixtures | End‑use devices (sinks, toilets, showers, bathtubs). | Typically brass or stainless steel |
| Traps | Water seal that blocks sewer gases. | P‑trap, S‑trap, bottle trap |
| Vent Pipes | Allow air entry, equalize pressure, prevent siphonage. | Usually PVC or ABS |
| Water Heater | Raise temperature of domestic hot water. | Tank‑type, tankless, solar, heat‑pump |
| Backflow Preventer | Protect potable water from contamination. | Double‑check, reduced pressure zone (RPZ) |