What is the maximum water velocity allowed on the suction piping for a spa?

The maximum water velocity allowed on the suction piping for a spa is set at 8 feet per second. This limit is important for ensuring safety and operational efficiency in pool and spa systems. High water velocities can lead to several issues, such as cavitation, which can cause damage to pump components and other system parts, as well as creating an increased risk of suction entrapment, particularly if the fixtures or drains are not designed to handle such flow rates.

By adhering to the maximum velocity limit, pool and spa contractors help to ensure that the plumbing system operates smoothly while minimizing wear and tear on equipment. In addition, maintaining a water velocity below this threshold contributes to safe bathers' experiences by reducing the risk of entrapment and improving overall circulation within the system.