those are Xeri spray nozzels made for drip irrigation. they are 180*. a waterlogged tank would not work, you need the bladder to give added pressure as the water is being sprayed. i was thinking about changing the 1" line down the frame to the valve to 2". should give me about 5 minutes of spray vs the 2 minutes i have now. if you have a tank the rest of the materials are bout $20. the tanks run around $50