What is the purpose of a hydrostatic test for aerial apparatus?

The purpose of a hydrostatic test for aerial apparatus is to ensure structural integrity under pressure. This testing method involves filling the apparatus's water-carrying components with a liquid, usually water, to a specified pressure and then monitoring for leaks or weaknesses in the material. This process confirms that the apparatus can safely withstand the operational pressures it may encounter during use, ensuring the safety of the operators and effectiveness of the equipment during aerial operations.

Ensuring the structural integrity of aerial apparatus is critical because any failure in these components could lead to catastrophic results. This testing also aligns with safety regulations and standards that require equipment to be proven reliable before it is put into service.