Pressure-fed sprinklers, also known as pressurized irrigation sprinklers, are irrigation systems where water is delivered under pressure to distribute evenly over a large area. These systems rely on a water pump 

Types of Pressure-Fed Sprinklers:

1. Impact Sprinklers

2. Plastic Rain guns

3. Brass Rain guns

4. Pop-Up Sprinklers

Applications:

• Residential Lawns and Gardens: Keeps lawns and landscaping properly irrigated.

• Agriculture: Used for irrigation of crops.

• Sports Fields and Parks: To maintain large turf areas.

• Golf Courses: For maintaining large and precise grass areas.

Maintaining proper water pressure is critical to ensure even distribution and avoid water waste.

Gravity-fed sprinklers use the force of gravity, rather than pumps or external pressure sources, to distribute water through the system. In this setup, water is stored in an elevated tank , and gravity generates the necessary pressure to move the water through pipes and sprinkler heads. 

Advantages of Gravity-Fed Sprinklers:

1. Energy Efficiency: Since it doesn’t require pumps or external power, gravity-fed systems are energy-efficient and have lower operating costs.

2. Simplicity: These systems are straightforward, making them easy to install and maintain.

3. Sustainability: With no need for electricity or fuel, gravity-fed systems are environmentally friendly.

Limitations:

1. Low Pressure: Gravity-fed systems naturally have lower water pressure, which can limit the distance and effectiveness of the water spray. Sprinklers need to be designed for low-pressure use, like drip systems or low-pressure rotary sprinklers.

2. Elevation Requirements: The effectiveness of the system depends on the height of the water source. If the water tank isn't sufficiently elevated, the pressure will be too low for efficient operation.

3. Flow Rate Variability: As the water level in the tank drops, the pressure decreases, potentially leading to inconsistent watering.

Applications:

• Small Gardens and Landscapes: Suitable for small-scale irrigation, especially in rural or off-grid areas.

• Rainwater Harvesting Systems: Water collected in tanks from rain can be used with gravity-fed sprinklers to irrigate gardens or fields.

• Agriculture: Common in areas where power or fuel for pumps may not be available, particularly in terraced farming or places with natural elevation differences.

Types of Sprinklers for Gravity-Fed Systems:

• Micro-Sprinklers

• Butterfly Sprinklers

• Rainhose Irrigation Systesms.