| Draining 5 gallons isn't going to help.
You may occasionally need to COMPLETELY drain that tank though. If it's an extremely well designed system, you may NEVER have to drain and refill that tank.
The reason that draining 5 gallons won't help is because you won't replace that 5 gallons with air when you close the valve, you will replace it with WATER, which gains you nothing.
In normal operation, that tank will be 1/2 to 2/3 full of water the rest of the space is a compressed bubble of air.
The proper maintenance is to COMPLETELY drain the tank so that it is 100% full of AIR, then refill... the air will compress to the top of the tank.
It is difficult to completely drain the tank because a 'vacuum lock' will be formed in the tank. Like when you put your finger on the top of a soda straw and pull it out of the drink...
So when the flow stops, you need to take measures to break that 'suction' ... __________________
Never worry about theory as long as the machinery does what it's supposed to do. LL |