OpenSprinkler › Forums › Hardware Questions › OpenSprinkler › Pump start relays › Reply To: Pump start relays March 20, 2016 at 10:18 pm #41807 RayKeymaster Yes, you will need a pump start relay (because a station on OpenSprinkler DC can only drive a load up to 1 amp max, if your pump requires 5 amp, you will need a relay).
