Gas Fitter Practice Test 2026 - Free Gas Fitter Practice Questions and Study Guide

The correct setting for a T/P (Temperature and Pressure) relief valve for a domestic 60-gallon hot water tank is typically 150 psi and 210°F. This pressure setting is significant because it ensures that the relief valve can effectively manage the pressure that builds up in the tank as water heats. The temperature setting corresponds to the maximum safe operating temperature for water heaters, as temperatures above this can lead to dangerous situations, including the risk of tank failure or scalding. By adhering to these standards, which are often dictated by local codes and manufacturer specifications, the safety and functionality of hot water tanks are maximized, preventing potential hazards that could arise from overpressure or excessive heat.