You are right, the system is same as OH-tank collecting rain water, when the OH-tank low sensor becomes LOW , OH-pump motor will start provided there is LOW level in storge tank is not activated, we should have water there.
You are right, the system is same as OH-tank collecting rain water, when the OH-tank low sensor becomes LOW , OH-pump motor will start provided there is LOW level in storge tank is not activated, we should have water there.