A constant discharge device (module) has been conceived and tested. With design discharges from 2 to 7 1/s as tested it is suited as a field outlet. The discharge rate is kept constant to within maximum deviations of #xB1; 5 with head variations in a range between 15 and 25 cm. The module has a simple design, no moving parts and is portable. A construction drawing for a 4 1/s module is shown.
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