Spa makes loud banging or knocking noises when pumps start or stop.

Safety first: Turn off power before tightening or adjusting plumbing.

• Bleed air: Run pumps with all Everlast jets open to purge air from lines. Cycle pumps on and off a few times.
• Secure plumbing: Add or tighten clamps and supports on PVC lines that move when pumps start.
• Check pump mounts: Inspect Everlast pump mounting feet and rubber pads; replace if deteriorated.
• Operate valves slowly: Avoid rapidly turning diverter or shutoff valves, which can cause water hammer.