Flow switches and PR5 and PR6 pressure switches are used to control functions on a hot or cold pressure washer. These can be wired to control boilers, motor start/stop and much more. We stock ST-5, 7 and flow switches. PR5 pressure switches and other makes are available should you need a different brand of a pressure switch. We recently have started to sell the Condor/ Fanel pressure switch rated from 0.22- 250 bar.