The discharge piping from the relief valve should be piped to a safe point for disposal and can be:

The correct choice of terminating the discharge piping from the relief valve above a floor drain is essential for safety and operational efficiency. Relief valves are designed to release excess pressure in a system, often as a safety measure to prevent catastrophic failure. If the fluid released isn't adequately managed, it could create hazardous conditions.

By discharging the relief valve above a floor drain, any fluid that is released can safely flow into the drainage system, minimizing the risk of spillage that could cause slippery surfaces or environmental contamination. This approach also provides an effective means of directing any potentially hazardous materials safely away from personnel and equipment.

A closed-off situation would impede the relief valve's function, which is counterproductive because it could prevent the valve from discharging when necessary, leading to possible equipment failure. Terminating the discharge piping at a high point could lead to issues such as backpressure or potential leaks. Buried discharge lines also pose risks; if a problem occurs, it would be difficult to address, and leaks could go undetected, leading to more significant hazards.

Thus, discharging above a floor drain balances safety with effective pressure relief management, ensuring that any released fluid is handled appropriately, reducing risks to both personnel and equipment.