25,000 gallons of my pool needs to be completely drained for maintenance purposes your pump and principal at a rate of 30 gallons a minute let it represent the number of hours the pool has been raining right now equation that can be used to determine the number of hours it will take to complete the drain the pool supposed start raining the pool Monday, May 7 at 8 AM would it be safe to schedule maintenance to begin on Tuesday, May 8 at noon