Irrigation Professionals with questions about ... - Hunter Industries

Record Site InformationConnect the pressure gauge to a hose faucet, open the faucet and recordthe static pressure on the sketch. Be sure there is no other water runningon the property while you are performing your test. Because pressure canvary a great deal throughout the day, try to measure the pressure as closeto the planned watering time as possible.Record the size of the water meter on your sketch; the size is stamped onthe top of the meter.Later, when you are calculating working pressure, you will need areasonably accurate estimate of elevation change between the point whereyou measured the static pressure, and where you will make the sprinklersystem tie-in (POC), so be sure to record this distance on your sketch. Youwill also need to record the elevation change from the POC to theproposed location of the highest head on the system.To determine service and delivery line size, wrap a string around theservice line and delivery line, then measure how long the string is, andcompare your measurement to the chart below. (This chart can also befound on page 11 of the Hunter Friction Loss Tables. The tables arelocated in the back of this design workbook). PVC pipe is the sameoutside diameter as clean galvanized pipe. Be sure to record thesemeasurements on your sketch.Length ofStringSize of ServiceLine - CopperSize of ServiceLine - Galvanized2 3/4” 3 1/4” 3 1/2” 4” 4 3/8” 5”3/4” 1” 1 1/4”3/4” 1” 1 1/4”Figure 1Measure and record the approximate length of the service line. This is theline that runs from the city water main to the water meter (or curb stop ifthe property doesn’t have a meter).Then measure the length of the delivery line, or the pipe that runs from themeter to the proposed sprinkler system point of connection (POC)location. Record the length of pipe and the proposed POC location.