Water Heater Parts Names and Functions — Complete Guide
Published: July 22, 2026 — CANRO Heating & Cooling — Greater Vancouver, BC
Water Heater Tank Parts
Tank: stores hot water (glass-lined steel). Anode rod: sacrificial metal that prevents tank corrosion. Dip tube: directs cold water to the bottom of the tank. Drain valve: allows draining the tank. T&P relief valve: safety device for over-temperature or over-pressure. Insulation: retains heat in the tank.
Gas Water Heater Parts
Gas control valve: regulates gas flow and temperature. Burner: where gas burns to heat water. Pilot assembly: standing pilot or electronic ignitor. Thermocouple: detects if pilot is lit (standing pilot models). Flame sensor: detects flame (electronic ignition models). Vent pipe: carries exhaust gases outside. Draft hood: ensures proper venting.
Electric Water Heater Parts
Upper heating element: heats the top portion of water. Lower heating element: heats the bottom portion. Upper thermostat: controls upper element. Lower thermostat: controls lower element. High-limit switch: safety cut-off if temperature exceeds safe limits. Wiring connections: 240V power supply.