Collection: Spa Timers

Spa timers are the panel-mount workhorses that drive scheduled filter cycles, ozone runs, and circulation pump on/off windows for hot tubs running older analog control boxes. Our spa timers collection covers the brands installed in nearly every analog spa pack ever sold in North America — Diehl, Grasslin, Reliance, and Intermatic — in 24-hour and 7-day formats, SPST, SPDT, and DPST configurations, and voltages from 24VAC up to 230V.

If your spa runs an older Hydro-Quip, Len Gordon, Allied, or Borg General control with a clear plastic dial on the front of the equipment bay, a panel-mount timer is what's behind it. Diehl timers are the most common direct-replacement brand for Hydro-Quip CS-series controls — match the pole configuration (SPST for single-circuit, SPDT for changeover, DPST for two-pole loads), the voltage stamped on the housing, and the trip duration (24-hour cycle for daily filter runs, 7-day cycle for weekly programs). Grasslin replacement timers cover the same footprints with override functionality for manual cycle starts. Spec sheets from Intermatic and Grasslin are useful for cross-referencing tripper styles and contact arrangements.

Replacing a spa timer is a two-step job: kill power at the disconnect, then unscrew the timer from the panel and transfer the wires one at a time to keep polarity correct. Most spa timers wire L1 and L2 on the line side, with switched output legs to the heater, circ pump, or filter pump. For systems that have outgrown analog timing entirely, the move is to a modern digital spa pack — see our Spa Packs collection — which handles all scheduling on the main board and eliminates the mechanical timer altogether. The supporting electrical hardware (fuses, relays, contactors) lives in our Spa Electrical collection.

Shop the full spa timer lineup below — Diehl, Grasslin, Reliance, and Intermatic panel-mount timers ship from one of our ten U.S. warehouses so your scheduled cycles are back on track fast.