" There are three lines from the city water inlet. One by passes the water filter and continues on behind the shower and down under the floor. One is cold water coming back to fill the water heater. And I have my hot water line the feeds the sink, shower, and under the floor to the galley. There is a misterious tee and elbow just after the pressure regulator that goes down under the floor at the water heater area. And there is a line that by passed the filter, goes behind the shower pan, and then goes down under the floor. "
I need to clarify my description I posted in my first post above after I have studied the plumbing system some more.
From the city water inlet, city water runs in through the pressure regulator valve, and then into the bathroom. There it tees feeding the water filter and connecting with what I think is the 12v
pump line feed. After the filter, this cold water line supplies the bathroom cold water, feeds the water heater, and goes on to the kitchen faucet.
My unknown line is this city water feed line has a tee right after the water regulator valve that runs a line under the floor. I do not know what this line does. And it appears the 12v
pump pressure line tees into the city line so you can pressurize the system with either city water, or 12v pump water. I assume city water pressure will go all the way back to the 12v pump. I assume the pressure regulator acts as a "foot valve" preventing 12v pump water from escaping out the city water connection point.
Does anyone know where I can get a plumbing diagram that shows the whole fresh water circuit?