Hayward TriStar® SP3210X15XE XE Variable Speed Pump 1.85 THP 115/230V. TriStar® XE Ultra-High Efficiency Pumps are bult to deliver maximum energy savings while cutting equipment costs by more than a third. With adjustable speed options, pool owners can customize their pump settings (and savings) without having to pay for more options than they need. Easy installation and dual-voltage capability, TriStar® XE is the best way to install a pump that complies with Dept. of Energy regulations.