Drip System Design for a Difficult Site by David Morgan 800-828-3388 www.geoflow.com
Design Parameters 3 Bedroom 2 bath home Soil loading rate 450 gallons, 150 g/d/bedroom Soil loading rate 0.2 g/d/ft2, from soil report Depth to seasonal high water table 20 inches, from soil report Depth to restrictive horizon 36 inches, from soil report Slope 2 to 4%, from site evaluation 800-828-3388 www.geoflow.com
Preliminary Design 2250 ft2 required 1125 linear feet drip tube 450 g/d ÷ .2 g/d/ft2 1125 linear feet drip tube 2250 ft2 ÷ 2 ft drip tube spacing 3 laterals 1125 lft req ÷ 400 ft (available area) = 2.8 10 g/m Operating flow 1200 lf ÷ 2 ft dripper spacing X 1 g/h ÷ 60 m/h 14.5 g/m Flushing flow 3 lines X 1.48 g/m(2 ft/sec) + 10 g/m operating 48 minutes maximum run time per day {[(2 ft X 2 ft) X .2 g/d/ft2] ÷ 1 g/h} X 60 m/h 45 minutes Actual run time per day 450 g/d ÷ 10 g/m (dosing rate) 800-828-3388 www.geoflow.com
Preliminary Design 800-828-3388 www.geoflow.com
Preliminary Design 33 psi operating loss on drip tube 93 psi flushing loss on drip tube WE MUST REDESIGN 800-828-3388 www.geoflow.com
Modified Design 800-828-3388 www.geoflow.com
Modified Design 4 psi operating loss on drip tube 24 psi flushing loss on drip tube NOW THAT WILL WORK 800-828-3388 www.geoflow.com
Modified Design for Quicker Pressurization 800-828-3388 www.geoflow.com
Typical Control Valve How well do they drain? 24VAC NC Diaphragm Lower Body Diaphragm Diaphragm Spring, 2 psi Upper Body Flow Control Knob Solenoid Manual Override 800-828-3388 www.geoflow.com
Questions or do you want to head down the road? Thank You Questions or do you want to head down the road? 800-828-3388 www.geoflow.com