What is the purpose of my large (4ft high about 2 ft circ) expansion tank on my well system? it is placed right after the inlet from the well. After that are a iron remover and water softener, then the hot water heater.
The expansion/pressure tank gets pumped full of water,under pressure.
It allows you to run water for a while before the pump kicks on---without it you would be turning on the pump each time you needed any water at all.---Think of it as your own in house water tower.--Mike---
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