Let me start by saying hello. This my first post, I just found the site this morning. I am building a rainwater harvest system. I have 2 550 gallon tanks connected with an equalizer tube. My plans are to use 1 submersible pump and a pressure tank. I am useing the water to feed a 2 bedroom, one bath summer home. What pump would work best for this? Will I need a 220v? All responses appreciated.