a. Need to be placed in such a way to throw the water sprinkler to sprinkler or head to head. b. In the irrigation industry, sprinklers are often called heads. c. The distance from the sprinkler head to the furtherest point of water application is the radius of throw.
a. With every turn in an irrigation piping system, there is created more resistance to flow. b. Care should be taken to make as few turns as possible when designing an irrigation piping circuit.
1. Refers to the incline or difference in elevation from one part of property to the other. 2. To find the slope measured in percentage you should: a. Divide the rise (measure of height) by the run (measure of length) b. Multiply the above figure by 100.
c. Example: If you measured from the edge of your house out 40 feet and pulled a level masonry line out that 40 feet and the level line was 12 inches off the ground, that would indicate a drop of 12 inches. Calculated: 12 inches ␣ 480 inches(40 feet) x 100 = 12 ␣ 480 = .025 .025 x 100 = 2.5%
In electricity, a complete circuit is one where the power flows in one wire or lead, goes through the electrical component (a light) and leaves on a different or neutral wire. If either lead is broken or interrupted, the power stops flowing.
All controllers need 120 volts or in that range to operate, but they have a transformer that steps down the electricity to 24 volts. This stepped down electricity is sent out through the field wiring to the solenoids that control the irrigation valves. The stepped down voltages is much safer.
Wire buried directly in the ground. Because of the extreme environment, approved wire should be used. All commercial systems require the use of UF (underground feeder) U.L. approved wire. The most frequently used wire for commercial application of an automatic sprinkler system is single strand, heavy gauge direct burial copper wire.
Underwrite ’s Laboratories – established by insurance companies and sets safety standards for all electrical supplies and devices in U.S.
Galvanized steel pipes
Steel coated with zinc to prevent rusting.
Polyvinyl chloride, plastic. This is a pipe of choice for irrigation.
Light or cream-colored plastic pipes specially formulated to withstand higher temperature for use with hot water.
Black plastic tubing used below ground. This is a pipe of choice for irrigation.
Tubing that is manufactured from 99.9% pure copper. Copper pipe is joined together using a solder that is melted with a propane torch.
1. Also know as a timer. 2. The part of an automatic sprinkler system that determines when a valve will turn on and how long it will operate.
Irrigation valve replacement
1. Tools and materials needed. a. A plastic sheet – to place soil on b. Long screwdriver – to remove valve box cover c. 2 shovels – to dip up box d. 2dbr e. 2dby f. 1 roll, black electric tape – to tape plunger inside solenoid from falling out. g. 1 PVC saw h. 1 strap wrench i. 2 pipe wrenches – large enough for your pipe and fittings. j. 1 can PVC cement k. 1 can PVC primer l. Repair coupling m. Slip coupling n. Pipe o. New valve
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