At what psi should fire hydrant heads be hydrostatically tested from the factory?

Fire hydrant heads are typically hydrostatically tested at 300 psi from the factory to ensure they can withstand the pressure of the water system and remain functional in emergency situations. This testing standard helps to confirm that the hydrants are reliable and durable once installed in the field. A hydrostatic test at this pressure verifies that there are no leaks and that the hydrant can handle the pressures that it may encounter during operation. It is crucial for fire hydrants to meet such rigorous testing standards to ensure safety and performance, especially when they are called upon to supply water during a fire emergency. The test pressure chosen is significantly above normal operational pressures, ensuring a wide safety margin under which the hydrant can safely operate.