Specifications of the components

The following is an extract taken from Irrigation Specification, for Residential and commercial use.
 SECTION 02811
 IRRIGATION SYSTEM
From the company Century Equipment.
It describes precisely each part of the component, commercialised by such company, giving a tolerance and describing physically the shape.

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C. Sprinkler Heads – Long Range 

 1. The full or part-circle sprinklers shall be a gear driven rotary type. The sprinkler shall be of a pop-up design with an overall height of 8-1/2”, a body diameter of 2-1/2”, a cap diameter of 3-3/8” and a pop-up stroke of 4”. The sprinkler shall be mounted at finish grade and shall have a 1” NPT or BSP female threaded inlet. The sprinkler shall be capable of covering up to a 52’ radius at 60 pounds per square inch pressure with a discharge rate of 10.2 gallons per minute. Water distribution shall be via two (2) nozzles that thread into a 2” diameter nozzle turret. The dual color-coded nozzles shall elevate 4” when in operation.

 2. The body and cap of the sprinkler shall be injection molded from ABS, a non-corrosive, impact-resistant, UV-resistant, heavy-duty plastic material. The cover and nozzle top shall be injection molded from Alcryn, a synthetic rubber, and be capable of providing excellent impact resistance. The sprinkler shall be available with a plastic or stainless steel riser. The sprinkler shall have a plastic filter screen sized to prevent entry of foreign material into the nozzle. All components shall be removable from the top of the sprinkler case via a snap ring retention method.

 3. The sprinkler shall have a single-piece riser/body seal that regulates flutings during pop-up and retraction to clear any debris from around the riser and a heavy-duty stainless-steel spring to ensure positive retraction. Rotation shall be accomplished by a water lubricated planetary gear-drive assembly driven by a variable reversing stator that maintains a constant speed of rotation with all nozzles. The variable reversing stator shall require no adjustments when changing nozzles.

 4. The sprinkler shall incorporate an anti-vandal arc memory feature that allows the nozzle to be turned beyond its watering borders without incurring any internal damage. If turned beyond its watering borders, the sprinkler shall automatically return to the previously set arc. The sprinkler shall have a standard rubber cover available in black, or lavender for effluent water use applications.
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Materials of Irrigation

Talking about irrigation involves also the simplest types of watering, such as the bucket and the garden hose.

Due to the requirements of a waterproof, light, and elastic material, able to resist sunlight overexposure as well as high amount of pressure, the simple garden hose has developed into various directions. The most common are:

Basic vinyl(PVC) hose (reinforced with a radial cord) is the least expensive and most lightweight option but also the least sturdy. It’s more prone to kinking, splitting and cracking than other materials and can degrade quickly if left in the sun or exposed to harsh weather.

Rubber hoses are generally the strongest and most long-lasting, but also carry the highest price tag and can be heavy to haul around the garden. Rubber has the added benefits of being able to carry hot water, being less likely to kink, and resisting cracking and ozone deterioration 

A trade-off is a composite rubber/vinyl garden hose.

Reinforced hoses (reinforced with a mesh lining between layers of vinyl and/or rubber) are more resistant to kinking and splitting, and can take higher water pressure levels.