Also called a dripper, an emitter distributes water droplets at a specified flow rate when used as part of a drip irrigation system. Emitters come in a variety sizes, styles, and flow rates. They have barbed or threaded bases. Barbed ends are either poked into 1/2" drip tubing or inserted into the end of 1/4" tubing. Threaded bases are screwed into micro tubing stakes and risers.
Drip Emitter Tubing comes with emitters pre-inserted in the tubing. It can be purchased in both 1/2" and 1/4" sizes with emitters spaced from 6 inch to 3 foot intervals.
Inline Emitters are use to create custom emitter tubing when used with 1/4" solid drip tubing.
Pressure Compensating Emitters distribute a consistent flow rate regardless of fluctuations in pressure.
Non-Pressure-Compensating Emitters will distribute varying flow rates as pressure fluctuates with elevation changes.
Staked Emitters sit on a spike and may distribute water in a spray or stream.
Multi-Outlet Emitters can be installed onto existing sprinkler rises as part of a sprinkler retrofit project. 1/4" tubing is installed on the emitter outlets and run to individual plants.
See also Emitter Tubing, In-line Emitter, Pressure Compensating, Non-Pressure-Compensating.
A filter contains a screen that is designed to remove particles from irrigation systems. Filters are critical components in a drip irrigation system. Drip emitters may clog if proper filtration is not provided. Typical screen mesh is 120, 150, and 200 mesh. The greater the number, the smaller the openings in the screen. 200 mesh is recommended for foggers (misters).
A device that lowers water pressure on the downstream side and maintains a constant operating pressure. Regulators are commonly used in drip irrigation applications as drip tubing and fittings are usually rated to operate at pressures lower than most household water systems. Always install a regulator after a valve and filter. They are not designed to be operated under constant pressure.
Pressure Compensating Emitters. The output will not vary with changes in elevation and pressure. They deliver the stated gph (gallons per hour) even if pressures range from 10-50 psi. These emitters are best used with elevation changes. They are self-flushing to reduce clogging. See also Emitter, Non-Pressure-Compensating.
Non-Pressure-Compensating Emitters. The output will vary with changes in elevation and pressure. These emitters are best used where the watering zone is level. Some non-pressure-compensating emitters are used with gravity-fed drip systems. They operate best at lower pressures. Recommended Pressure for most non-p-c emitters: 15-20 psi. See also Emitter, Pressure Compensating.
Also called an "Insect Plug", a bug plug is installed in 1/4" drip tubing to keep insects from entering and clogging the tubing. Bug plugs do not restrict the flow of water to plants.