Integration of CSV in to Earthship Water Organizing Module

[Earthshipper]

Hi,
I'm building an Earthship style building in Canada. Water is collected from roof into two 1200Gal tanks behind the structure. Water is piped into the house by gravity, then into a WOM (water organization module), which is essentially a series of filters, pump and pressure tank. I'm wondering how to incorporate a CSV into this system.
Single family(3) home. All one level, focus on water conservation. Demands: kitchen sink, 2 vanities, clothes washer. Current pump is 3.5 GPM shurflo with integrated 45psi pressure switch. Have yet to acquire Pressure Tank. I'm curious about sizing of PT and where to install CSV into the system

[Cary Austin]

I am not familiar with that Shur flo pump?  If it is a positive displacement type pump, as most RV style pumps are, it will not like having its flow restricted with a valve.  Can you get me more info or a curve for that pump?

[Earthshipper]

attached a photo of the specs. not married to this pump, if something else will work better

[Cary Austin]

Sorry for the delay.  I don't know of any 12 volt pumps that will work.  You will need a jet pump, which will be 115V or 240V and needs to be powered by an inverter to work with solar.