Control.py

import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BCM)

GPIO.setup(2, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)  # Tank 1 Sensor
GPIO.setup(3, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)  # Tank 2 Sensor
GPIO.setup(14, GPIO.OUT)                            # Output To Relay 1 (Pump 1)
GPIO.setup(15, GPIO.OUT)                            # Output To Relay 2 (Pump 2)

try:
    GPIO.output(14,0)
    while True:
        if (GPIO.input(2) == GPIO.LOW):     # Tower Tank Top Sensor Cover With Water
            GPIO.output(14,0)               # Close The Relay 1 (Pump 1 ON)
            GPIO.output(15,1)               # Open The Relay 2 (Pump 2 OFF)
            print("Pump 1 [ON], Pump 2 [OFF]")
        elif (GPIO.input(3) == GPIO.HIGH):  # Tower Tank Bot Sensor Not Cover With Water
            GPIO.output(14,1)               # Open The Relay 1 (Pump 1 OFF)
            GPIO.output(15,0)               # Close The Relay 2 (Pump 2 ON)
            print("Pump 1 [OFF], Pump 2 [ON]")
        time.sleep(0.1)

finally:
    GPIO.cleanup()