int lowWaterPin = 10;
int pumpPin = 14;

void setup() {
  Serial.begin(9600);
  pinMode(lowWaterPin, INPUT_PULLUP);
  pinMode(pumpPin, OUTPUT);

}

void loop() {
int x = digitalRead(lowWaterPin);
if (x == LOW) {
  digitalWrite(pumpPin,LOW);
  Serial.println("pump off?");

}

if (x == HIGH) {
  digitalWrite(pumpPin,HIGH);
  Serial.println("pump on?");

}
}