Hot Tub Hot Spring Tri-X Spa Filter
The Tri-X filter filtrates by depth & surface to deliver more effective filtration area & longer time between cleaning. Plus they're dishwasher-safe for easy maintenance.  
From 2005-current the Tri-X has come standard on the following Hot Spring models:
  • Aria
  • Grandee
  • Vista
  • Envoy
The Tri-X System can be used on any Hot Spring Model Spa 1990 & older. Find the standard paper Hot Spring Filter here