Evolution Spas Reduced Jet Flow / Hydraulic Restriction

Jets are weak or there is very little water pressure from the Evolution Spas jets.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Dirty or clogged filter cartridge, Air lock in plumbing, Partially closed slice valves, Debris in pump impeller

How to Fix / Troubleshooting

Safety: Turn off power at the GFCI breaker before removing filters or opening pump unions.

  • Clean filter: Remove and thoroughly rinse the filter cartridge. Replace if it appears collapsed or heavily stained.
  • Check valves: Ensure all slice or ball valves in the equipment bay are fully open.
  • Bleed air: Loosen the pump union slightly to release trapped air until water flows, then retighten.
  • Inspect pump impeller: If flow is still weak, remove the pump wet end cover (with power OFF and spa drained below pump level) and check for debris in the impeller.

If jet flow remains poor after these steps, the pump may be worn and require replacement.

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Repair Difficulty

Medium 3/5

Required Part

Filter Cartridge
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