Originally Posted by overgrowit
Bwanabud, do you use the 8mm tubing for a main line? Also, do you do a closed loop around the room or do you have the tubing branch off to different sections with tee fittings?
Yes I run the high grade white 8mm line around the perimeter of the room(open loop/ "U" shaped), then install the 8mm tees at each table/light, run 8mm orange tubing down onto the table,,,and branch off to each plant with the 3mm line. I install 8mm valves at each main tee, so I can shut the table down independently...or flip to the 1/4" tubing side and rinse the plants at that table with the spray stakes.
I leave the end of the main run open(not closed loop), because I have a valve at the end to flush line...or bleed air out of the system on start up, or rez wash out.
I'm running 4 full pressurized systems now, each doing 50-70 plants a piece...each utilizing their own rez and needed nutes for the age group. I run gauges on both the hi/low pressure sides to see the working pressure of the pump & outlet(after regulator)to the Blumat system. I also use an in-line check valve to stop back flow of water to pump, and as I said a much larger accumulator to minimize pump cycling.