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Buried watering

The presence of a hose and a sprinkler, which must be constantly moved to get a uniform watering and the need to store them during each mowing (up to twice a week in peak growth) constitute real chores. (Non-contractual photo, does not necessarily reflect the drawing)

To remedy this, there is only one solution: bury pipes and sprinklers. The systems to be adopted depend directly on the surface to be treated and the financial resources that can be devoted to this type of installation.

Mixed systems

There are mixed devices including a network of buried pipelines, enclosures and connection bases likely to accommodate aerial sprinklers or retractable sprinklers. The quality of flexible hoses made of reinforced PVC or polyester polyamide, now allows their use buried without special protection. In this type of installation, they replaced the pipes made of semi-rigid polyethylene or rigid PVC that were once used.
Hence a simplification of the installation, the connections being made by simple interlocking held by clamps instant closure. The housings can receive either "water point" type fittings to which a garden hose is connected, or a sprinkler or sprinkler base. Easy to install, inexpensive to buy, this device finds its limits in a reduced pipe section (19 mm). It can only be suitable for a small area if you want to water a lawn. On the other hand, it is an excellent solution to have water points near massifs or in a vegetable garden.

Modular watering systems

Next to the very simple system that has just been described, there are kits comprising a number of elements, very close in their design, those of professional underground installations. Designed to water a surface up to 700 m2 these kits include retractable gun sprinklers, fixed nozzles, they also retractable, all the equipment of connection and derivation, finally automatic purge valves, ensuring the emptying of the installation after each watering.
Polyethylene pipes are used here, the connections being made by interlocking, immobilized by stainless steel screw clamps. Supplied in boxes, these kits can of course be completed as needed. In all cases, the assessment of the material to be acquired results from a study of needs in relation to the surface, but also from watering possibilities depending on the supply.
If you benefit from a pump feed, it is easy to choose it according to the needs of watering. In the case of a water supply by the city or the municipality, it must be ensured that the supply valve of the future installation will be able to deliver a static pressure and a flow rate compatible with the sprinklers. It suffices for this to perform a simple calculation taking into account the pressure (expressed in kg / cm2 or in bars) and the flow (expressed in 1 / h) required by sprinkler. It will still be necessary to know the static pressure and the flow of the supply valve.
If the pressure is usually indicated by the water company, or can be easily controlled with a manometer (It is always prudent to have one after the meter), the same is not true of the flow that depends on both the pressure and the diameter of the valve. The table below must be able to help you in your calculations.

Buried watering system

Buried watering system

TAP OF 15/21

Static pressureWater flow
kg / cm2liter / second

TAP 20/27
Static pressureWater flow
kg / cm2liter / second

An electronic programmer (there are very cheap, connected after the tap) will advantageously complete the installation.

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