Sub-Surface Drip Irrigation - SPRINKLER TALK
Sub-Surface Drip IrrigationDesign, Installation and Maintenance GuideXF-SDI Driplinewith Copper Shield TechnologyRain Bird XF-SDI Dripline uses our leading XF driplineand adds patent-pending Copper Shield Technologyto protect the emitter against root intrusion in sub-surface applicationsSub-Surface Design, Installation, Maintenance Recommendations
Sub-Surface Drip IrrigationDesign, Installation and Maintenance GuideOVERVIEWThis manual is written for Irrigation Specifiersand Landscape Architects. Included here are thedetailed design steps to specify a grid of Rain BirdXF-SDI Dripline with Copper Shield Technology,complete with information on: Emitter spacing, distance between dripline rowsMaximum run length and maximum zone areaAdjustments for trees, slopes, and curves in the turf areaSupply and flush manifold designCalculation of application rates and run timesRecommended installation practicesDefinitions for all underlined words in this manualare found in the glossary on page 27RAIN BIRD XF-SDI DRIPLINE WITH COPPER SHIELD Product DescriptionRain Bird XF-SDI Dripline with Copper Shield is a reliable and durable drip solution for turf grass and bed applications.The tubing is made of high quality polyethylene that is unmatched in toughness and flexibility. The tubing contains emitterswith Copper Shield a non-toxic protection from root intrusion that requires no on-going maintenance.Copper Shield EmitterXF-SDI Series DriplineEmitter in useOnce installed, water comes out of the dripline at discreet points, then moves in the soil through capillary action to spreadevenly across the entire area irrigated by the grid of subsurface dripline. The grid is made up of buried rows of dripline withpre-installed emitters that are either 12”, 18” or 24” apart. The selected spacing between rows and between emitters dependson the soil type and is discussed on pages 6 and 7. Design steps for trees, slopes and curved edges are found starting onpage 12. Supply and flush manifolds are shown on pages 15 and 17. Precipitation rates and run times are shown on page19. Equipment selection, installation and maintenance tips are on pages 22-25.Once the system is designed and installed, successful operation and maintenance comes from standard practice for dripirrigation, including regular filter maintenance and periodic line flushing.2www.rainbird.com
Sub-Surface Drip IrrigationDesign, Installation and Maintenance GuideBEST APPLICATIONS Curves and edgesNarrow turf areasLarge turf areasSub-surface shrub & ground cover areasNear buildingsAdjacent to parking lotsSmall confined areaAthletic FieldsSOME BENEFITS OF SUB-SURFACE DRIP IRRIGATION Increased efficiencyUses less waterAvoids oversprayLess prone to vandalismHealthy plant growthIncreased watering uniformityNo damage to fences or treesLess water run-off into sewers & drainsLower maintenanceIncreased time for field or turf usageNo wind issuesLess evaporative lossAREAS WHERE OVERSPRAY MUST BE AVOIDEDIt is a challenge to avoid overspray in narrow turf areasalong a roadway, narrow parking strip, or car dealership.These examples show how subsurface drip irrigation canavoid overspray by irrigating from below grade.Car Dealerships or parking lotsNarrow strips or next to roadwaysAdjacent to buildings or hardscapeswww.rainbird.com3
Sub-Surface Drip IrrigationDesign, Installation and Maintenance GuideCOMPONENTS OF THE RAIN BIRD SUB-SURFACE DRIPLINE SYSTEMManual Flush Point installedat the low point of exhaustInstall Air / Vacuum Relief Valvesat the highest point(s) of the dripline zoneTop ofvalve boxCoils of flexibletubing to directflush waterConnect to flush manifoldXF-SDI Driplinewith Copper Shield TechnologyBurieddripline2”frompavededgeLow Volume Control Zone(Refer to Control Zone Pyramid for sizing)LIST OF BASIC COMPONENTS 4Manifold or Supply LineControl ZoneXF-SDI Series DriplineAir Relief ValveManual Flush ValveRain Bird Controllerwww.rainbird.com
Sub-Surface Drip IrrigationDesign, Installation and Maintenance GuideDESIGN STEPS FOR RAIN BIRD XF-SDI DRIPLINE with Copper Shield UNDER TURF GRASSDetermine the available flow rate of the irrigation waterWhat is the point of connection information for the overall project site; size, flow rate, static and dynamic pressure?Choose the emitter flow rate, spacing between emitters, and spacing between rows; then separate the project into zonesWhat is the predominant soil and subsoil type (sand, loam, or clay)?Make an initial decision about the number and size of each zoneIs the water supply adequate for one zone? If not, how many zones are needed?Adjust for trees, slopes, and irregular edges and add more zones if necessaryShould trees be irrigated with a separate zone?Is there a slope and should the bottom of the slope be on a separate zone?Are there unusual shapes or curves around the edges?Lay out the final grid pattern and design the supply and flush manifoldsIs it a small zone that can use polyethylene manifolds, or a large zone that requires larger diameter manifolds?Determine the precipitation rate, run time and schedulingWhat is the precipitation rate and what is the run time to apply the required water?EASY SOIL TYPE TEST1001. Remove 1 to 2 cups of soil from the zone to be irrigated.2. Place into a glass jar, like a mason jar.3. Fill the jar half way with water. Shake and let sit for2 hours so the particles can settle. The heavier sand particleswill settle to the bottom, then silt, then clay on top.4. Measure the height of all 3 layers of the soil then the heightof each layer; divide the height of each layer by the totalheight to figure out the percentage of each soil in the jar.5. Apply these figures to the “Soil Classification” chart.In the example, now you know the landscape soil is Loam.80SandyClay6020Silt HeightSand Height3” Total Height66% 2”Silt1017% 1/2”SandSilty ClayLoamClay LoamSandy ClayLoamSandy ofClay4060taenLayer HeightTotal Hei Soil Pe ghtrcentageTotal Height30Clay4017% 1/2”Clay2070For Example:Clay Height10rcPeMeasure total height and layer heights907080LoamSilt Loam90Silt1001009080706050403020100Percentage of Sandwww.rainbird.com5
Sub-Surface Drip IrrigationDesign, Installation and Maintenance GuideOVERALL DESIGN PLANFOR THE SITEWHAT IS YOUR SOIL TYPE?The objective of a well-designed dripline system is to create aneven wetting pattern of water in the soil throughout theplanting zone. There are four factors to consider for plantingareas to create an even wetting pattern: Soil type (Clay, Loam, Sand) Dripline emitter flow rate (.6 GPH or .9 GPH) Dripline emitter spacing (12”, 18”or 24”) Lateral row spacing of the driplineSoil Infiltration Rates in Inches per HourPercent of SlopeClayClay Loam Sandy LoamSand0% - 4%0.31 - 0.19 0.54 - 0.31 0.88 - 0.59 1.25- 0.885% - 8%0.25 - 0.15 0.43 - 0.25 0.70 - 0.64 1.00 - 0.70Note: As the slope increases, infiltration rates will continue to decrease.These values are derived from USDA information.Cross section viewof Dripline 2”12”SandCHOOSE THE EMITTER FLOW RATE, SPACING BETWEEN EMITTERS, AND SPACING BETWEEN ROWSWhat is the predominant soil and subsoil type (sand, loam, or clay)?Rain Bird SDI specified under turf grass should be designed in a grid pattern, with supply and flush manifolds so that theindividual drip emitters will be set out in a pattern with uniform spacing from one emitter to the next.Driplines should be specified to lie a minimum of 4 inches below finished grade. If the turf area will be aerated, the driplinesmay be specified to lie 6 inches below grade and the drawings should be clearly labelled with a warning to aerate only withtines that are less than 4 inches long. All of the rows in the grid should be collected together into a flush manifold so thatthe system can be regularly purged to get rid of accumulating particles that could impact the system in the long term.Connecting the rows to a common flush manifold also ensures a looped system. A looped system is much safer in case of aline break because it provides positive pressure on both sides of the break to stop dirt from entering the drip line.The table at the top of this page gives recommended emitter flow rates and spacing for three basic soil types. If the soil typeis not known, or if there is a good chance that there will be many different types of soil at the site, use the shortest distancebetween emitters and rows from the table to be sure that the root zone is well irrigated. If there is heavy loam or claysubsoil, this will help reduce the downward flow of water in the soil and allow for wider spacing between rows.XF -SDI Series Dripline Selection GuidelinesSoil TypeClayClay Loam Sandy LoamSandEmitter Flow Rate (gallons per hour)0.6 gph0.6 gph0.9 gph0.9 gphEmitter Spacing24”18”18”12”XF -SDI Dripline Lateral Spacing18” - 24”18” - 24”18” - 24”12”- 18”Application Rate (inches per hour)0.32 - 0.24 0.43 - 0.320.64 - 0.48 1.44 - 0.96Number of Minutes to apply 1/4”of water47 - 6235 - 4723 - 3110 - 16Note: These are general guidelines, field conditions may require modification to emitter flow rate, emitterspacing and lateral spacing.6Burial Depth Turfgrass Applications:Recommended consistent burial depthof 4, 5, or 6” Shrub and Groundcover Applications:1. On-surface under mulchor2. Sub-surface to a consistent depthof 4, 5, or 6”www.rainbird.com
Sub-Surface Drip IrrigationDesign, Installation and Maintenance GuideLATERAL ROW SPACINGXF Series Grid Layout with End FeedAir Relief ValveKit in Valve BoxXF Series DriplineLateralsInline EmittersFlush ValveWetted AreaControl Zonein Valve Boxnesral liLategpacinral sLateCompression orInsert FittingsFrom Water Sourcethengun Lral RetaLlineDripPVC, polyethylenetubing, or driplineheaderApplication Width8 feet96 inchesDESIGN CONSIDERATIONSLATERAL (ROW) SPACINGA range of lateral row spacing (Ex. 18”-24”, loam soil) is providedin the table on page 6. But to calculate equal lateral row spacingfor the design application, you need to know the width of theapplication and then use the calculation as shown in Example 1.Example 1: How to Calculate Equal Lateral (Row) Spacing Application width 8’ Convert into inches: 8’x 12” 96” It is recommended to space dripline 2”from hardscapes and4”from separate planting zones. In this example there arehardscapes on each side of the planting zone. Remove thehardscape: spacing on each side from the total width:96”- 4” 92”. From the previous example, the range of lateral row spacing is18”-24”. Use the low end of the range (in this case 18”) 4”2”–4”fromhardscapeXF Series Dripline Space the tubing 2”-4”from hardscape and other plantingzones. Lateral spacing is a design consideration and can becalculated as shown in Example 1: How to Calculate EqualLateral (Row) Spacing. Because water is split into two separate paths that meet inthe middle, the total continuous loop length of driplineshould not exceed twice the maximum lateral length. Installations using dripline without a check valve should usean air/vacuum relief valve at a high point in the system toavoid back siphoning material into the emitters. Manual flush should be installed at the mid point of theLite Layout.calculate the number of spaces between rows: 92” 18” 5.1. Round to get whole spaces. Round up if the decimal is0.5 or higher, round down if it is less than 0.5. In this case youshould round down to 5 whole spaces between rows. Calculate the equal lateral row spacing: 92” 5 18.4”. Calculate the number of dripline rows by adding 1 to thenumber of spaces between rows: 5 1 6 dripline rows.7
Sub-Surface Drip IrrigationDesign, Installation and Maintenance GuideAPPLICATION RATEThe application rate is the rate that the XF-SDI SeriesDripline applies water to the soil. This is used todetermine run times for the zone based on the plantswatering requirements. Table is provided to make it easyto determine application rates for every model of XF-SDISeries Dripline when using common row spacing (12”–24”). The table is divided into two sections, a 0.6 GPHemitter flow section and a 0.9 GPH emitter flow section.Go to the section for the specified emitter flow rate andfind in the left hand column the specified emitter spacing.Now find the lateral row spacing across the top of thetable. Follow the lateral row spacing column down andthe emitter spacing row across until the two meet. This isthe application rate in inches per hour. For example, a 0.6GPH emitter flow rate with 18”lateral row spacing has anapplication rate of 0.43 inches per hour.Lateral Row SpacingEmitterSpacing12”13”14”15”16”0.6 GPH Emitter Flow (Inches per hour)12”0.96 0.89 0.83 0.77 0.7218”0.64 0.59 0.55 0.51 0.4824”0.48 0.44 0.41 0.39 0.360.9 GPH Emitter Flow (Inches per hour)12”1.44 1.33 1.24 1.16 1.0818”0.96 0.89 0.83 0.77 0.7224”0.72 0.67 0.62 0.58 0.5417”18”19”20”22”24”0.68 0.64 0.61 0.58 0.530.45 0.43 0.4 0.39 0.350.34 0.32 0.3 0.29 0.260.480.320.241.02 0.96 0.91 0.87 0.790.68 0.64 0.61 0.58 0.530.51 0.48 0.46 0.43 0.390.720.480.36231.1 x Emitter Flow Rate (GPH)Dripline Lateral Row Spacing (Inches) x Emitter Spacing (Inches)Example:Calculation:Emitter Flow Rate 0.9 GPH231.1 x 0.9 GPH 0.63 inches per hourEmitter Spacing 18”18.4 inches x 18 inchesDripline Lateral Row Spacing 18.4”DETERMINE MAXIMUM LATERAL LENGTHS (FEET)You need to know the operating pressure and the emitterspacing to determine the maximum lateral run length.Inlet Pressurepsi1520304050XF Dripline Maximum Lateral Lengths (Feet)12” Spacing18” Spacing24” SpacingNominal Flow (GPH) Nominal Flow (GPH) Nominal Flow 3614470775594CALCULATING ZONE WATER REQUIREMENTSAt this point the emitter flow rate and spacing between emitters androws has been selected. Use the tables below to determine the overallwater application rate for the turf area, and this will lead to themaximum size of each zone. The tables show the total water appliedper 100 square feet of turf area for various emitter flow rates andspacing. Converting water application rate into gallons per minute foreach 100 square feet gives a quick way to determine the maximum sizeof each zone from the available water source. Be prepared to add morezones if required for trees and slopes.XF-SDI Dripline Flow (per 100 feet)Emitter Spacing0.6 GPH Emitter0.9 GPH Emitter2”2”82”2”12”18”24”61.0 GPH 1.02 GPM 92.0 GPH41.0 GPH 0.68 GPM 61.0 GPH31.0 GPH 0.51 GPM 46.0 GPH1.53 GPM1.02 GPM0.77 GPM20”www.rainbird.com
Sub-Surface Drip IrrigationDesign, Installation and Maintenance GuideCALCULATING ZONE WATER REQUIREMENTS (CONTINUED)After the dripline layout design is complete, you will need to identify total zone flow. This is used to help determine mainline,supply and exhaust header, and control zone (valve, filter, and regulator) selection. Calculating zone water requirements can be done by adding up the total dripline line in the zone. Convert the totaldripline to hundreds of feet (650 feet would be 6.5 in hundreds of feet). Multiply total dripline in hundreds of feet by the flow per 100 feet for your specified dripline. This can be found in Table 3.To read the table, select the emitter flow rate in the row across the top (0.6 GPH or 0.9 GPH) and then select the emiiterspacing in the left column (12”, 18” or 24”). Follow emitter flow rate down and emitter spacing across to find the flow per100 feet for the XF Series dripline specified. For example, for a zone that has 650 feet of 0.9 GPH emitters an 18” emitter spacing, the calculation would be 6.50 x 1.02gpm 6.6 gpm for the zone. Supply lines and headers should be sized to provide the flow to the zone without exceeding 5 feet per second velocity.This can be done using the zone water requirement and referencing information on the appropriate piping located atwww.rainbird.com/reference or in the back reference section in the Rain Bird catalog.SPECIFYING PRODUCTS IN THE ZONEAfter completing the dripline layout design, you’ll need to determine the other remaining products that will be in the zone.The products that make up a dripline zone are normally the control zone (an assembled unit that provides a valve, filter, andregulator), fittings that connect the dripline, and flush and air relief valves that allow for flushing water or bleeding offtrapped air.FITTINGSXFD-CROSSThe design for a dripline system will use fittings for variousconnections. If you choose a Grid layout, you may need atransition fitting from the supply piping to the XF SeriesDripline. Within the dripline grid there will be fittings to connectlateral rows to the header. If you are using a Lite Layout, you willalso use a transition fitting from the supply piping, as well as afitting at the end or midpoint of the zone so that a flush pointcan be D-INPVCRain Bird offers a full line of fittings in two types: 17mm insertfittings are designed for use with XF Series dripline. Rain Bird’sEasy Fit compression fittings handle XF Series and other driplineand tubing sizes fom 16mm to 18mm OD.MDCFCOUPRain Bird 17mm insert fittings have a barbed end that is raisedand sharp providing a strong connection. This fitting is rated foroperating pressures up to 50 psi without using clamps. Ifoperating pressures exceed 50 psi, a clamp is recommended. Toinstall, the fittings are pressed into the tubing with no need forspecial tools. It is important you do not heat the polyethylene tubebefore inserting to make installation easier, as it will weaken theconnection and can damage the tubing. For the full line of insertfittings, refer to our website at www.rainbird.com/drip/fittings orconsult a Rain Bird product MDCFCAPMDCFELMDCF75MPTMDCF50FPTRain Bird patented Easy Fit compression fittings go together with half the force as insert fittings and can be used on driplineand tubing with diameters from 16 to 18mm OD. This provides the versatility to eliminate the inventory of over 160combinations of connections. The Easy Fit compression fittings provide a stronger connection and can be used withoperating pressures up to 60 psi. For the full line of Easy Fit fittings, refer to our website at www.rainbird.com/drip/fittings orconsult a Rain Bird product catalog.www.rainbird.com9
Sub-Surface Drip IrrigationDesign, Installation and MaintenanceSPECIFYING PRODUCTS IN THE ZONE (CONTINUED)CONTROL ZONESA control zone provides the proper water flow to a zone,filtration to assure containments are removed that can plugemitters, and pressure regulation for optimum performance ofthe dripline system. With the broadest product line in theindustry and easy installation and maintenance that will savetime, Rain Bird control zones are the choice for any project.Features and benefits include: Durable and reliable low, medium, and high flow rates.Rain Bird’s low flow valve leads the industry handlingflows down to 0.2 gpm without weeping.See video at www.rainbird.com/lowflow. 200 mesh high capacity stainless steel filters that will catchgrit and debris that could clog emitters causing a reductionin water flow that could damage plants. Filters that are simple to remove from the body and areeasily cleaned under a faucet or in a pail of clean water. Commercial high capacity filter that has a maintenanceindicator that tells you when it needs cleaning. Pressure regulators that reduce operating pressure to 30 psior 40 psi. Compact size with the filter and regulator combined in thesame housing to reduce parts an potential leakingproblems. Compact size makes the control zone easier toinstall and it can allow for fitting more control zones in avalve box.ModelControl Zone Selection i)COMMERCIAL HIGH FLOW: 15–40 gpmXCZ-PRB-150-COM 1 1/2”x 2 15-40 20-150 150-PESB 1”PR Quick-CheckBasket Filter (2)@ 1”COMMERCIAL MEDIUM PLUS FLOW: 3-20 gpmXCZ-PRB-100-COM 1”x 1”3-20 20-150 100-PESB 1”PR Quick-CheckBasket FilterRESIDENTIAL / LIGHT COMMERCIAL MEDIUM FLOW: 3-15 gpmXCZ-100-PRF**1”x 1”3-15 20-120100-DV* 1”PR RBYXACZ-100-PRF1”x 1”3-15 20-120 100-ASVF* 1”PR RBYRESIDENTAIL / LIGHT COMMERCIAL LOW FLOW: 0.2–5 gpmXCZ-075-PRF3/4”x 3/4” 0.2-5 20-120LFV-075* 3/4”PR RBYXACZ-075-PRF 3/4”x 3/4” 0.2-5 20-120 ASV-LF-075 * 3/4”PR RBYXCZ-LF-100-PRF 1”x 3/4” 0.2-5 20-120LFV-100* 3/4”PR RBY* Pressure-Regulating RBY Filter** Available with BSP rical High Flow: 15–40 gpm4040XCZ-100-PRB-COMCommercial Medium Plus: 3–20 gpm303030XCZ-100-PRFXACZ-100-PRFResidential/Light Commercial Medium Flow: 3–15 l/Light Commercial Low Flow: 0.2–5 gpm10www.rainbird.com
Sub-Surface Drip IrrigationDesign, Installation and MaintenanceSPECIFYING PRODUCTS IN THE ZONE (CONTINUED)TIE-DOWN STAKESXF Series tie-down stakes (TDS-050) are used to hold dripline inplace. Designed with notch sides for better hold down strength,they are made of long lasting corrosion resistant 12-gaugegalvanized steel. Use stakes to hold dripline on-surfae or under amulch cover. For best results, stagger stakes every 3 feet in sand,4 feet in loam, and 5 feet in clay. At fittings where there is achange of direction such as tees or elbows, use tie-down stakesclose to the fitting on each leg of the change of direction.TDS-050with bendAR Valve KitAIR/VACUUM RELIEF VALVESAir/Vacuum Relief Valves are used for two reasons: To freely allow air into a zone after sundown. This ensures avacuum doesn’t draw debris into the dripline. (Back siphoning) To ensure a means of releasing air from the dripline when thezone is turned on, thus eliminating air pockets and speedingup dripline operation.Install Air/Vacuum Relief Valves correctly by: Locating at the highest point(s) of the dripline zone. Install the valve in an exhaust header or a line that runsperpendicular to the lateral rows to ensure all rows of thedripline can take advantage of the air/vacuum relief valve.MANUAL LINE FLUSH POINTA manual flush is used when flushing lines in the system or whenemptying the system when preparing for winter.FINISH GRADE/TOP OF MULCH Install the manual flush at a low point in the exhaust header ofa Grid layout, or at the mid point of a Lite Layout. Install a flush port with a threaded plug or a manual flushingvalve in a valve box with a gravel sump adequate to drainapproximately one gallon of water. Manual flush points are normally installed as far away from thewater source as possible.7 INCH VALVE BOXRAIN BIRD SEB-7XBLANDSCAPE DRIPLINE TUBINGRAIN BIRD LANDSCAPE DRIPLINEXF-XX-XXFLUSH PLUGRAIN BIRD MDFCAPCONTROLLERSMULTI-DIAMETER COUPLINGRAIN BIRD MDCF-COUPRain Bird Controllers offer the most advanced features to helpyou efficiently manage all your irrigation needs.BRICK (1 OF 2)SYSTEM CHECK OUT & TESTIt is important that after a zone is installed that it be tested toensure it is operating properly. Walk along the dripline to makesure each emitter is functioning and there are no breaks. Test thepressure as far away fom the water source as possible to verifythat the rest of the zone is at acceptable pressures. If readings arelower than they should be, a line, break, clogged, filter, cloggedpressure regulating valve, or reduced line pressure are possiblecauses. Checking the flow of each zone with a flow meter canalso be a good test to verify water supply.www.rainbird.com3-INCH MINIMUM DEPTH OF3/4-INCH WASHED GRAVELNOTES:1.ALLOW A SMALL AMOUNT OF TUBING PLAY INSIDETHE VALVE BOX IN ORDER TO DIRECT FLUSHEDWATER OUTSIDE VALVE BOXLANDSCAPE DRIPLINE FLUSH POINTN.T.S.POTABLE SYSTEM7-14-0811
Sub-Surface Drip IrrigationDesign, Installation and Maintenance GuideTrees. With any irrigation strategy, it is recommended thattrees planted in grassy areas should be irrigated on adifferent zone and with a separate system than the turfgrass. This is particularly true with subsurface drip becauseover time, tree roots could push the buried subsurface driplines up to the surface. Also, trees are more valuable thangrass, so if the system for the grass area needs to be turnedoff to avoid water consumption, then a separate system forthe trees can still be operated to maintain health.TREES and CURVED EDGESTREESAdjust for treesTreeZoneRecommendedAcceptableNot recommendedThe tree is on a separate zone and there is fullseparation between the tree and the turf grass.Although the tree and turf grass are on the samezone, the buried dripline should be placed farenough away from the trunk so that tree roots donot pushthe dripline to the surface.There is no additional water for the tree.The dripline is close to the trunk andthe tree roots will probably push theburied dripline up to the surface.CURVED EDGESAdjust for curved edgesCurved Edges. Rain Bird XF-SDI Dripline with Copper Shield is flexibleto follow curves that are 3 inch radius and larger. When there are curvedshapes in the landscape, avoid showing dripline rows that follow thecurved edges of the design. Instead, lay out as many straight lines aspossible to simplify the installation, then fill-in missed areas withadditional straight lines if possible. When the design layout is finished,make a grid pattern overlay to scale with the selected emitter and rowspacing (for example, a grid that is 12 inches by 18 inches). Place theoverlay on top of the design and check to be sure that at least one rowand not more than two rows are found in each grid. This procedureensures good uniformity in the design and avoids creating areas that mayreceive too much or too little water.When installed on bare ground, specify Rain Bird stakes (LD16STK orTDS-050) to hold tubing in place and pin the dripline with stakes every5 feet on straight runs; and every foot when following a curve of 4 footradius or less. Stakes are not required if the dripline is installed directly inthe ground with mechanical equipment.12RecommendedNot Recommendedwww.rainbird.com
Sub-Surface Drip IrrigationDesign, Installation and Maintenance GuideCONFINED AREASDESIGN FOR A CONFINED AREAWhat follows is a step by step process for the final gridlayout and manifold design. This process is shown first forsmall, confined areas. A second procedure is shown onpages 16 and17 for larger applications where the zoneboundaries are not naturally defined. It is recommended toput the driplines 4 inches below finished grade. If the turfarea will be aerated, the driplines should lie 6 inches belowgrade.Lay out the final grid pattern and design the supply and flush manifoldsEstablish the overall grid concept. Generally, the least cost grid design is to place the manifold along the short dimensionand design rows to run the length of the long dimension. This reduces the manifold material cost and will have fewerconnections.A. Identify the zone boundaries and show the direction of the dripline row.B. Determine the maximum row length from the chart below. The chart gives the maximum length for agiven pressure at the lateral inlet (not the pressure available at the water source).1. To choose the maximum row length at this step, estimate the inlet pressure available at the row that isfarthest away from the water source.2. Perform a pressure loss calculation from the water source to the farthest end of the manifold toconfirm that all driplines will have adequate pressure. Be sure to account for changes in elevation.C. Specify the distance from the edge of the zone to the first row in the grid.1. For turf that is planted against a hardscape edge or curb, the first row should be 2 inches away fromthe edge.2. For turf that is adjacent to a planted area, the first row should be 4 inches away from the edge.D. Measure the widest part of the zone and specify the number of rows.1. Find the widest zone dimension (in inches).2. Subtract the specified distance from both edges.3. Divide by the spacing between rows, and round up to the nearest whole number.4. Add 1 to this number to find the exact number of rows in the grid.E. Design a manifold system that provides the pressure that was assumed in step B above to each of therows.1. For small areas with less than 8 GPM total flow, the manifold can be made of polyethylene tubing,either with or without emitters.2. For larger confined areas, divide the zone into subsections with no more than 8 GPM flow and designa polyethylene header system for each of these subsections.F. Repeat the process at the opposite end of the zone to design flush manifolds and connect the flushmanifolds to a manual or automatic valve so that the entire grid can be flushed regularly.www.rainbird.com13
Sub-Surface Drip IrrigationDesign, Installation and Maintenance GuideSLOPESIrrigation water may move through the soil and accumulate atthe low points. Slopes that are less than 3% (3’ of fall in 100’)do not require any special design consideration. For slopesgreater than 3%, the driplines should be installedperpendicular to (or across) the slope. This places each driplateral at a uniform elevation and does not allow irrigationwater to follow the dripline in the ground.When the slope is steeper than 5%, water flow in the soilcan be significant. To simplify design and installation, thespacing between rows and emitters can remain the sameeverywhere in the slope. The area at the bottom 1/3 of theslope, however, should be controlled as a separate zone.Run time on the separate bottom zone can then be reducedin case water migration from higher elevations causes thelower area to get too much water.ELEVATION CHANGES - SLOPE LAYOUTAdjust for slopesThe design of the dripline system should account for theslopes, berms, banks, or depressions on the site since runoffmay occur with slopes of 3% or greater.pef SlooTop Dripline laterals should run perpendicular to the slopewhenever possible. Lateral row spacing should be normal spacing within the
Sub-Surface Drip Irrigation Design, Installation and Maintenance Guide 4 www.rainbird.com COMPONENTS OF THE RAIN BIRD SUB-SURFACE DRIPLINE SYSTEM LIST OF BASIC COMPONENTS Manifold or Supply Line Control Zone XF-SDI Series Dripline Air Relief Valve Manual Flush Valve Rain Bi
Antifreeze Solutions in Home Fire Sprinkler Systems 100138.04.000 May 28, 2010 CODE CONSULTANTS, INC. Page 1 Executive Summary NFPA 13, Standard for the Installation of Sprinkler Systems, has included guidance on the use of antifreeze solutions in fire sprinkler systems since the 1940 edition.1 Antifreeze solutions may be used in fire sprinkler systems where the piping system, or File Size: 942KBPage Count: 100Explore furtherNFPA 13: Standard for the Installation of Sprinkler .archive.orgNFPA 13: Standard for the Installation of Sprinkler Systemswww.nfpa.orgNFPA 13-2010: Installation of Sprinkler Systems (The .rtmconsultants.comNFPA 13 Standard For The Installation Of Sprinkler Systems .nfpa13.engineeringdesignresources. NFPA 13-2019: Installation of Sprinkler Systems Standard .blog.ansi.orgRecommended to you b
Trickle/Drip Irrigation Worksheet Drip irrigation zones may cover a larger area than sprinkler irrigation zones. The calculations for drip systems are based on each zone. Zones should be designed so the crop type, crop maturity and soil type are the same through the entire zone. Considerations for drip irrigation system chemigation are:
The Irrigation Requirement is the Crop Water Requirement after taking into account the irrigation efficiency and, for drip systems, the drip factor: IR CWR * Df / Ie For irrigation systems other than drip, the drip factor 1. 6. Irrigation Water Demand (IWDperc and IWD) The portion of the Irrigation Water Demand lost to deep percolation is .
Drip irrigation has been widely adopted throughout the world. The use of sub-surface drip irrigation in the U.S. increased from 163,000 to 260,000 ha in the five-year period from 2003 to 2008, an increase of 59%. In comparison, the surface drip irrigation land area increased from 566,000 to 694,000 ha, or 23%i. More than 70%
threads only, while taking care not to allow a build-up of compound in the sprinkler orifice. D. Use ONLY sprinkler wrench 13635W/B (shown in Figure 1) for installing ESFR Sprinkler VK510! With the sprinkler contained in the protective cap, install the sprinkler onto the piping by applying the sprinkler wrench to the sprinkler
1. An automatic sprinkler system for a Small House is an improvised sprinkler system which mainly comprises sprinkler heads, sprinkler pipes, a set of sprinkler control valves, a sprinkler pump and a sprinkler tank. 2. For the design and main components of an automatic sprinkler system, reference shall be made to the attached Schematic Drawing for
your drip irrigation system. However, by understanding the various design factors, you can help ensure that your drip irrigation system is properly designed and operated. System components, basic design principles, practical applications, and operating guidelines are discussed in this publication. Advantages of drip irrigation 1.
additif alimentaire ainsi que d’une nouvelle utilisation pour un additif alimentaire déjà permis. Les dispositions réglementaires pour les additifs alimentaires figurent à la partie B du titre 16 du RAD. L’article B.16.001 énumère les exigences relatives à l’étiquetage des additifs alimentaires. En particulier, l’article B.16.002 énumère la liste des critères qui doivent .
