Sprinkler heads are made of metal and are screwed into the piping at standard intervals. The water is prevented from leaving the sprinkler head by an arrangement of levers and links whichare soldered together on the sprinkler head. How many psi is the sprinkler head designed to withstand without injury or leakage?

A. at least 1000 psi
B. up to 400 psi
C. up to 300 psi
D. at least 500 psi


Ans: D. at least 500 psi

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