One of the main tasks of designing an irrigation system is the sprinkler head layout. The sprinkler head layout consists of deciding what kind of sprinkler heads will be used and where exactly they will be placed. When I do a layout I place flags in the yard representing where each head will go.
I continue to mark out the sprinkler heads, using different color flags for each individual zone. For example, the front right spray zone may have blue flags at each spot where a spray heads will be placed, a side spray zone may have orange flags, and a back rotor zone would have red flags.
Makita 1 2 Drill
Keeping each zone its' own color will help you with the building of your sprinkler system so that you don't mix the wrong heads on a particular sprinkler zone.
When laying out your lawn sprinkler system remember to not mix rotors and spray heads as I mentioned in my previous article. Rotors and sprays put out water at a different rate so you'll want to keep them separated.
Rotor heads typically throw 30 feet and can be reduced slightly if needed. Sprays can throw from 4 feet to 18 feet depending on what type of nozzle you use. Rotors can usually be adjusted from about 25 degrees to 360 degrees radius. Spray nozzles come in either fixed or adjustable pattern radius. I try and stick with fixed nozzles (ie. 15 half, 10 quarter, 12 full etc...) because they have a better spray pattern and don't tend to get clogged like the adjustable pattern sprays.
A 15 half nozzle, on a spray head, throws a 15 foot radius of water in a 180 degree pattern. a 15 quarter spray nozzle throws water out in a 90 degree pattern. A 10 half spray nozzle throws out water a 10 foot radius in a 180 degree pattern. A 10 full throws out water in a 360 degree pattern (full circle) with a diameter of 20 feet (still a 10 foot radius).
Spray nozzles from major brands like Rain Bird and Hunter have the pattern and size of nozzle imprinted on the actual nozzle to help identify. A 12 half has the imprint "12 H" and has hash marks showing the 180 degree pattern. Rain Bird even color codes the nozzles for quicker identification of nozzle when out in the field. 15's are black, 12's are brown, 10's are blue, 8's are green (discontinued now), 4's are yellow. They only started doing this a few years ago, so there are still many old nozzles where all the sizes are still black, so always make sure to look for the imprint.
Rotor nozzles come in different GPM (gallons per minute) sizes. The most typical sizes used in residential landscapes are 2.0 and 3.0 rotor nozzles. You may find the occasional 1.5, 5.0, or even 6.0. but it's not too common for average sized yards. To provide for even watering with rotors, you would use 1.5's for the rotor heads that will be watering approximately 90 degrees, and use 3.0's for the heads that will be turning 180 degrees. Don't freak out if you can't get this exact...just try to be as close as you can.
Overall the most important factor when doing a lawn sprinkler head layout is to make sure that you have "head to head" coverage. What this means is that the water from one sprinkler head reaches the next sprinkler head in the yard. This will ensure even precipitation and "double coverage" which is essential to a proper lawn sprinkler design.
So a couple of main points to remember when designing out your lawn sprinkler system are: Make sure that you don't mix rotors & sprays. Make sure that they heads are laid out so that you have double or "head to head" coverage. Use different color flags to represent the different zones when flagging or marking out where each sprinkler head will be placed.
Black Friday Makita BHP452HW 18-Volt 1/2-Inch Compact Cordless Percussion-Driver Drill 2011 Deals
Nov 12, 2011 21:07:14
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Black Friday Makita BHP452HW 18-Volt 1/2-Inch Compact Cordless Percussion-Driver Drill Feature
- Makita-built 4-pole motor delivers 450 in./lbs. of max torque, with a variable 2-speed all-metal transmission
- Compact, ergonomic design; only 8-3/4 inches long and weighs just 3.6 pounds
- Built-in LED light illuminates the work area
- Makita LXT lithium-ion battery and 15-minute rapid charger produces 430 percent total lifetime work
- 3-year warranty on tool; 1-year warranty on battery and charger
Black Friday Makita BHP452HW 18-Volt 1/2-Inch Compact Cordless Percussion-Driver Drill Overview
2.5x more cycles and 430 percent total lifetime work are produced with the LXT Lithium-Ion battery and Optimum Charging System. Makita built, 4 pole maximum torque motor delivers 450 in/lbs of torque. A wide range of driving and drilling applications are covered with the 2 speed design (0-400 / 0-1.500). Shifting between modes is quick with the Shift-Lock system. Operator fatigue is reduced with the lightweight, compact design with a weight of 4.2 lbs. and length of 8-3/4". Trigger forward built in LED light illuminates the work area. Ergonomic shape has a glove like fit providing even pressure and easy control grip. Increased comfort on the job is provided by the soft grip handle.Black Friday Makita BHP452HW 18-Volt 1/2-Inch Compact Cordless Percussion-Driver Drill Specifications
The Makita BHP452HW 18-volt 1/2-inch compact cordless percussion-driver drill delivers versatility in a compact size to the jobsite. The BHP452HW can be run as a driver-drill or a hammer driver-drill, allowing the user to carry just one tool on the job instead of two, replacing the standard driver-drill. View larger | ||||
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The BHP452HW features a Makita-built four-pole maximum torque motor that delivers 450 in./lbs. of max torque in a compact size. The BHP452HW has a Shift-Lock drive system sleeve that quickly shifts from "hammer drill" to "driver" mode. The two-speed all-metal transmission delivers 0-400 RPM in low speed and 0-1,500 RPM in high, covering a wide range of drilling and driving applications.
Ergonomic Design in a Compact Size
The BHP452HW weighs just 3.6 pounds with a more compact design at only 8-3/4 inches long and an ergonomic shape that fits like a glove for reduced operator fatigue. The BHP452HW is also equipped with a built in LED light that illuminates the work area for more efficient work.
Versatile Design for a Range of Applications
The BHP452HW's percussive hammer and driver-drill capabilities are a perfect fit for the pro that wants more features in a compact size. This tool is perfect for a range of applications requiring percussive hammer-drilling, including fastening medium-sized anchors, drilling into masonry, and even setting small-sized anchors into concrete. The BHP452HW will handle a full range of drilling and driving tasks into wood and other materials, and can be utilized in many different areas such as HVAC, woodworking, plumbing, electrical, and more. It's ideal for any pro contractor who requires a best-in-class engineered cordless hammer driver-drill. The BHP452HW is just another example of Makita's commitment to innovative technology and best in class engineering.
About Makita's 18-Volt Compact Lithium-Ion Cordless Tool Series
As one of the pioneers driving the cordless tool revolution, Makita changed the game with its breakthrough 18-Volt LXT Lithium-Ion Cordless series. Three years after its debut, Makita's LXT series has grown from seven to over 35 tools, providing a wide range of cordless solutions for professional tradesmen. Makita also added 18-volt compact lithium-ion for cordless power in a more compact size. Makita's 18-volt lithium-ion batteries and ENERGY-STAR rated Optimum Charging System provide several benefits over old battery technology. When compared to traditional 18-volt NiCd batteries, Makita's 18-volt lithium-ion batteries have 40% less weight, longer run time, and five times lower self-discharge to keep cells active and ready to use at any time.
Makita's 18-volt lithium-ion battery delivers 2,000 cycles--2.5 times more than NiCd. In addition, built-in shock absorbing features help protect the battery, and 16 firm-holding contact terminals deliver constant high power. During the charging process, a built-in memory chip in the battery communicates with the Optimum Charger for a more efficient charge, extending the battery life. Makita's Optimum Charger is also faster: it will charge an 18-volt LXT lithium-ion battery in just 30 minutes, and an 18-volt compact lithium-ion battery in only 15 minutes. Makita also offers a Rapid Automotive Charger for 18-volt LXT and 18-volt compact lithium-ion batteries that plugs into 12-volt DC sockets equipped in most automobiles and trucks for added mobility. Makita's growing line of LXT cordless tool solutions features a wide range of industrial-quality power tools, including driver-drills, impact drivers, impact wrenches, saws, grinders, screwguns, rotary hammers, and more. The LXT series also offers a jobsite radio, rechargeable flashlights, and several different combo kits.
About Makita
Makita is a worldwide manufacturer of industrial-quality power tools and offers a wide range of industrial accessories. Makita applies leading-edge innovation to engineer power tools that are more compact and energy efficient, yet deliver industrial-strength power and results.
Warranty
Every Makita lithium-ion tool is backed by Makita's 3-year warranty that covers repair due to defects in materials or workmanship up to three years from the date of original purchase. Makita lithium-ion batteries and chargers have a limited 1-year warranty.
What's in the Box
Makita BHP452HW 18-volt compact lithium-ion cordless 1/2-inch driver-drill, two 18-volt compact lithium-ion batteries, 15-minute rapid optimum charger, and tool case.
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