During a monthly inspection of a non-gauge Class K extinguisher, how should you check the weight?

• A. Compare the current weight to the manufacturer’s stated full-weight
• B. Weigh against a standard kitchen weight every month
• C. Check the pressure gauge reading
• D. Check the label for a maintenance date

Answer: (A)

Non-gauge extinguishers rely on weight as the indicator of remaining contents. In a monthly check, place the extinguisher on a scale and compare its current weight to the full-weight specification shown on the label or data plate from the manufacturer. Use the same scale each time and record the result. If the weight matches the full weight within the manufacturer’s allowed tolerance, the extinguisher is considered serviceable. If it’s noticeably lighter, there may have been a discharge or a leak, and the unit should be serviced or recharged by a qualified person. The other options aren’t appropriate here: a kitchen weight isn’t a calibrated method for this purpose, there is no pressure gauge on a non-gauge unit to read, and checking a maintenance date doesn’t verify current contents.