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Table 4.  Subsurface drip installation methods. 

 

INSERTION 
METHOD 

ADVANTAGES DISADVANTAGES 

a) Hand Trenching*  

•Handles severe slopes and confined areas 
•Uniform depth 

•Slow 
•Labor intensive 
Disrupts existing turf and ground 
•Back fill required. 
 

b) Oscillating or Vibrating  
plow -  
of the cable or pipe pulling 
type.  
 

• Fast in small to medium installations.  
•Minimal ground disturbance 
•No need to back fill the trench. 

•Depth has to be monitored closely. 
•Cannot be used on steeper slopes(20% ) 
•Requires practice to set and operate 
adequately. 
•Tends to "stretch" pipe. Shorter runs are 
required. 
 

c) Trenching machine. 
Ground Hog,   Kwik-Trench,  
E-Z Trench* 

•Faster than hand trenching 
•May use the 1" blade for most 
installations 
•Uniform depth 

•Slower, requires labor. 
•Disrupts surface of existing turf.  
•Back fill required. 
 

d) Tractor with GEOFLOW 
tubing insertion tool - see 
diagram 3. 
 

Preferred method.

 

•Fast.  
•Little damage to  existing turf. 
because of the turf knife. 
•Minimal ground disturbance. 
•Does not stretch drip line. 
•Adaptable to any tractor. 
 

• The installation tool is designed 
specifically for this purpose and is only 
available from GEOFLOW. 

e)Tractor mounted 3-point 
hitch insertion implement 

•Fastest. Up to four plow attachments with 
reels.  
•A packer roller dumps back soil on top of 
the pipe. 
 

•Suitable for large installations only.  

* NOTE: Disturbing the soil may effect the pore structure of the soil and create hydraulic conductivity problems. Please 
consult with your soil scientist or professional engineer before making the installation technique decision. 
The State of Georgia specifically does not accept the practice of using a conventional back-hoe.

 

 
 
 
 
 

6. SYSTEM MAINTENANCE 

Monitor the system 

The best way to assure years of trouble free life from your system is to continuously monitor the system and to automate all 
maintenance functions. For large systems or systems with a BOD > 20 mg/l automation of maintenance is essential. For 
smaller systems with a BOD < 20 mg/l quarterly inspections and maintenance is adequate. 
• Frequent automatic filter flushing based upon pressure drop across the filter is essential for the correct operation of the 
system. Filters should be cleaned when the pressure difference reaches 50 kPa. If the filter clogs frequently, a larger filter  
may be required. 
• Flush the system under pressure.  The velocity in the pipes should be as high as possible to transport the deposits and 
scale. Use the pressure regulator bypass or kick-in both pumps if two pumps are used. This should be done at least every 
40 cycles of the disposal fields. 
• Inject  a commercially available cleansing solution with fresh water through the system. Chlorine and either phosphoric 
or sulfuric acid at low concentrations are suitable. This should be done automatically in the event of the flow rate dropping 
more than 5% below specified standard flow rate. 
• Clean the pressure reducing valves and check that they are working well.  Check system pressures. 
• Clean flush valves and vacuum release valves. 

 

Summary of Contents for WASTEFLOW

Page 1: ...pplied to On Site Effluent Disposal of Wastewater Design Installation Maintenance Manual TRIANGLE WATERQUIP 13 Hinkler Road Mordialloc Vic 3195 Australia Ph 03 9580 2122 Fax 03 9580 3131 www trianglewaterquip com au sales trianglewaterquip com au ...

Page 2: ...DESIGN PARAMETERS 4 6 SYSTEM MAINTENANCE 9 Select area 4 Monitor the system 9 Table 1 Minimum surface area Soil layers and types Disposal field design 4 5 5 Before digging 10 Flow pressure calculations 5 APPENDIX 1 Hydraulic Curves 10 Table 2 Emitter flow rates Table 3 Water application rate 5 6 Distance from edge 6 WARRANTY 11 Wind 6 High points and siphoning Slopes 7 7 Excessive level difference...

Page 3: ...nimises deep percolation Increases consumption of nitrates by the plant material Invisible and vandal proof installations Durable systems with no moving parts for a long life Non intrusive It allows use of the space while in operation Easily automated Subsurface drip irrigation systems have been used in both agriculture and landscaping for over 20 years Subsurface drip is becoming more popular eve...

Page 4: ...ning or fully automatic filter system would be best suited Media screen or disc filters can be used depending on water quality Refer to Triangle Filtration for advice A secondary or back up check filter should be installed as far down the system s as practical This is an insurance policy in case a break occurs in the main line or solids coagulate form on the pipe walls and strip off in larger form...

Page 5: ...ses several times per day near the soil surface where the soil dries the quickest this would keep the soil absorption rate at the highest value and minimize the potential of water surfacing on poor soil conditions As stated previously this design criteria will under load the system at all times except when the soil is at or near saturation from rainfall If designing for an efficient irrigation sys...

Page 6: ...select filters and valves g Do a complete list of materials and specify all the requirements for the installation h For more precise calculations on slopes use the curves given in Appendix 1 at the end of this manual A system will usually have emitter lines laterals placed on 60 cm centers with a 60 cm emitter spacing such that each emitter supplies a 0 36 m2 area These lines are best placed at de...

Page 7: ...operating pressure 100 kPa 15 psi j If a 750 litre dosing volume were used for an average flow of 3000 litres per day about 4 irrigation cycles per day would be made lasting about 6 8 minutes each k In many cases it may be more convenient to have two 2 or more smaller irrigation stations instead of one single large one This would be done by dividing the total disposal field into the number of sect...

Page 8: ... uniformity of the system and helps to avoid siphoning dirt into the system when there is a broken line Two tees can be used Positioning of vacuum breaker flush valves Ensure that these valves are at a point high enough to prevent the system from draining through these valves when the water pressure is switched off Mounds Concentrate drip lines at the top of the mounds with wider spacing towards t...

Page 9: ...ubing injector tool which can be attached to the 21 4 tool bar of most tractors is available from GEOFLOW A diagram of this is available on request Cover all open ends including dripline ends to avoid getting debris into the system Leave enough length at the beginning and end for connections It is convenient to finish the last foot of the trench by hand This gives more room for connections Beware ...

Page 10: ...aulic conductivity problems Please consult with your soil scientist or professional engineer before making the installation technique decision The State of Georgia specifically does not accept the practice of using a conventional back hoe 6 SYSTEM MAINTENANCE Monitor the system The best way to assure years of trouble free life from your system is to continuously monitor the system and to automate ...

Page 11: ...1 Hydraulic Details Classic Drip Line Pressure vs Emitter flow rates Pressure kPa Flow LPH 80 3 7 100 4 0 150 5 0 200 5 9 16 mm 2 4 l hr Wasteflow PC Pressure Loss Tables Internal Diameter mm 14 mm Maximum Recommended Run Length m vs Pressure kPa Inlet Pressure kPa 0 6 m Dripper Spacing 100 71 150 112 200 136 250 154 300 170 350 183 400 194 Based on minimum pressure of 80 kPa All run lengths calcu...

Page 12: ...y limited to providing the original purchaser with a replacement for any defective product or part and does not include the cost of installation of the replacement and in no case shall Geoflow be liable for any special incidental or consequential damages Warranty Claims All claims must be made in writing to Triangle Filtration at the address below within 30 days after the defect is discovered Thes...

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