Uses 

Lateral Water Distribution:

• The 3/4-inch pipe is commonly used as a lateral line that distributes water from the mainline to various parts of the irrigation field.

Drip Irrigation Lines:

• If it’s flexible tubing (like polyethylene pipe), it might serve as a main or sub-main for drip emitters or inline drip tape.

Sprinkler Feed Lines:

• It could be used to feed sprinkler risers or mini sprinklers, especially in greenhouses, lawns, or landscape beds.

Joint Box (JB):

• If “JB” stands for junction box, this could be an electrical or control junction box used to house connections for:

1. Irrigation valves
2. Solenoid wiring
3. Sensors (like moisture or flow sensors)

• These are often buried or installed at grade level to protect components and allow easy maintenance.