Spa Flow Switches

Spa flow switches are directional and pressure switches are not. However, pressure switches have to be installed on the output side (pressure side) of the pump while a spa flow switch will work on either side. As far as the heater itself, as long as it is filled with moving water it doesn't matter which direction it flows.

Flow switches are used to detect whether there is any water flowing through the heater assembly. Unfortunately, when these things fail, they generally fail in the closed position and there is no indication that they are not doing their job. In most cases a spa system will work just fine with a stuck pressure or low switch - until there is a need for it.

Grid Control Spa Flow Switches

Part No. Description Price Order M25 M25 25A, 1-1/2" SKT Flow Switch $111.32 M-2 M-2 1-1/2" SKT Flow Switch $61.05 24-FO-025-000 24-FO-025-000 M-25 Replacement Switch $20.82

Harwil Spa Flow Switches

Part No. Description Price Order Q8DSA Q8DSA 1" MIP Flow Switch, 15Amp $131.68 Q12DSMSC Q12DSMSC 1/2" MIP Flow Switch Pilot Duty $66.01

Aqualarm Spa Flow Switches

Part No. Description Price Order 206-PVC-NOS 206-PVC-NOS 1.5" $113.33 206-PVC-NOT 206-PVC-NOT 1.5" FIP $131.38 PVC-NOS-1 PVC-NOS-1 Replacement Switch $34.54

Universal Spa Flow Switch Kits

Part No. Description Price Order 60-1008 60-1008 Flow Switch, Replaces Q12DS, Q8DSA, Q9DSP, 206-PVC-NOS, 206-PVC-NOT $67.00 60-1009 60-1009 Adapter 1-1/2" x 1-1/2", Replaces Q9DSP, 206-PVC-NOT $4.92 60-1010 60-1010 Adapter 1" x 1/2", Replaces Q8DSA $4.58 60-1011 60-1011 Tee 1-1/2" Slip x 1/2" FPT, Replaces 206-PVC-NOS $11.02 60-1012 60-1012 Tee 1-1/2" FPT, Replaces 206-PVC-NOT $13.89