This is approximately what the day's production has achieved. Made out of 3/4" copper pipe, two valves, three male pipe thread fittings and a tee.
It will shut off with the valve on the stem of the tee flow to or from that equipment inside the shed.
The other valve will shut off or allow flow from the patio and the connection on the remaining part will connect to the 1000 liter tank further up the hill.
Pressure testing will commence when I find the device to connect it to the water hose.
Pressure testing complete refined illustration