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For appliances designed to operate at 14 inches w.c. or less, overpressure protection devices are required only if the service supply pressure exceeds ______ psi.

1) 10
2) 12
3) 16
4) 20

Answer :

Final answer:

For appliances designed to operate at 14 inches w.c. or less, over pressure protection devices are required only if the service supply pressure exceeds 12 psi.

Explanation:

For appliances designed to operate at 14 inches w.c. or less, over pressure protection devices are required only if the service supply pressure exceeds 12 psi.



So, the correct answer is option 2) 12.

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