Hunter

A Hunter sprinkler requires an optimal operating pressure of between 2.1 and 2.8 bar to prevent excessive water atomization. If the supply pressure is below 2.1 bar, the spray radius is drastically reduced; if it exceeds 3 bar without a regulator, the droplets turn into mist that the wind carries toward the pool.

To check the circuit’s performance, review these parameters:

• Minimum activation pressure: 1.4 bar.
• Optimal operating pressure: 2.1 bar for traditional nozzles and 2.8 bar for rotary models.
• Individual flow rate per nozzle: between 0.6 and 18 liters per minute, depending on the arc.

You should choose 10 cm pop-up sprinkler bodies combined with adjustable-sector nozzles or side-strip models. This setup allows you to set the arc precisely to 180 or 90 degrees, preventing the spray from entering the pool and disrupting the water’s chemical balance.

The nozzle’s adjustable range of 1.5 to 5.2 meters makes it possible to define the edge of the pavement with millimeter precision. If the area has low water pressure, an Optima 0.25 HP Single-Phase Pump provides the hydraulic support needed to supply auxiliary pressure lines on separate plots.

The main difference lies in the precipitation rate and application pattern: the fixed nozzle emits a constant sheet of water at a high application rate, while the rotary nozzle sprays multi-trajectory jets at a low rotation speed. The fixed option delivers its flow in short 5- to 10-minute cycles, making it vulnerable to wind drift. In contrast, the MP Rotator applies water slowly at a rate of 10 to 15 mm/h, reducing surface runoff on sloped ground near the pool pavement.

It is advisable to install solenoid valves with flow control and PVC bodies resistant to fertilizers and chlorinated water. The standard model requires a standard 24 V AC solenoid to open the solenoid valves in an underground valve box, operated by wiring from the home’s central controller.

Secure the installation by following these technical guidelines:

• Install quick-release threaded unions with 1-inch male threads.
• Place a 10 cm bed of clean gravel beneath the valve box to facilitate drainage.
• Use gel-filled waterproof connectors to insulate electrical connections against condensation.

The rain sensor connects directly to the terminals marked SEN or RS on the terminal strip of the Hunter controller. Before inserting the sensor’s two wires, remove the metal jumper or bypass wire factory-installed between the two terminals.

Once the wires have been inserted and screwed into the board, move the controller’s side switch to the Active position. The sensor will automatically stop irrigation when it detects accumulated rainfall of 3 to 20 mm, preventing waterlogging in walkways adjoining the pool.

Irrigation networks and auxiliary services can share the outdoor water supply, provided a separate backflow preventer is installed to protect drinking water from any pressure backflow. When the network is divided into zones, the irrigation line typically operates at a regulated pressure of 2.5 to 4 bar at the technical valve boxes.

To equip the outdoor area with functional water outlets without reducing the pressure of the scheduled irrigation flow, installing a 35-liter solar shower with foot-wash tap for the pool provides a dedicated rinsing station through a branch line upstream of the solenoid valve manifold.

All Hunter components officially distributed in Spain are covered by the 3-year statutory warranty against manufacturing defects, in accordance with the EU legislation in force in 2026. The warranty covers internal mechanical faults in turbines, premature diaphragm failure in solenoid valves, and electronic failures in control modules.

Damage caused by water hammer, damage resulting from frost because the pipe was not drained in winter, or nozzle clogging due to the lack of upstream sand filters in well water is excluded.