wapi_case-1-148×148 2013

What is a Water Pasteurization Indicator (WAPI)?

What is a Water Pasteurization Indicator (WAPI)?

A WAPI is a transparent tube which contains wax. The wax melts and drops to the bottom of the tube when it reaches 150°F (65°C) for 6 minutes indicating that the water has been pasteurized and is now safe to drink.

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