
How Big Should Make-Up Water Tanks Be?
Make-up water tanks should be sized to cover the system’s total daily fluid loss rate multiplied by the required autonomy period in days, plus a reserve margin of 20 to 25 percent above the calculated minimum. The two variables that determine makeup water tank capacity are how fast the system loses fluid and how long the tank must supply makeup water before it is refilled or replenished from the utility supply. Key Takeaways Make up water tank size is determined




