What is the maximum temperature for a fresh, hot water sanitizing rinse as it enters the manifold?

• A. 180 degrees F
• B. 172 degrees F
• C. 210 degrees F
• D. 194 degrees F

Answer: (D)

In hot-water sanitizing dishwashing, you need water hot enough to sanitize, but the system also has an upper limit on incoming hot water to protect equipment and ensure safe, controllable final rinse temperatures. The water entering the manifold is capped at 194°F (about 90°C). This gives enough heat to reach the required sanitizing level (the final rinse should be at least 180°F on the dishes) after the machine’s internal controls mix or regulate the temp, while preventing damage or scald risk from water that’s too hot. The other temperatures don’t fit because they either won’t meet the sanitizing requirement (172°F) or exceed the equipment’s safe operating range (210°F), while 180°F describes the final rinse target, not the maximum incoming temperature.