Drip Irrigation Parts List: Every Component Explained Before You Set Up

Last updated: October 2026 · Written by the LawnVibe editorial team.

Drip irrigation saves water and keeps foliage dry, but the first trip to the irrigation aisle can be confusing: dozens of fittings, three or four tubing sizes and emitters in every color. This drip irrigation parts list walks through every component from the faucet to the plant, explains what each one does and how to choose the right size. Once you understand the parts, setting up a system for vegetables, raised beds or flower borders is straightforward.

For a full installation walkthrough, see how to set up a drip irrigation system for vegetable gardens or how to install drip irrigation for raised beds.

How a drip system fits together

Every drip system has three sections:

1. The head assembly at the water source, which controls, cleans and reduces the pressure of the water.
2. The distribution tubing that carries water through the garden.
3. The emitters that deliver water to each plant.

Fittings, end caps and stakes hold everything together.

Part 1: The head assembly

Timer

A battery-powered hose timer threads onto an outdoor faucet and opens the water on a schedule. Drip systems run longer than sprinklers, often 30 minutes to a couple of hours, so automation makes them far easier to manage. Install the timer first, directly on the faucet, unless its instructions say otherwise.

Backflow preventer

A backflow preventer, sometimes called a vacuum breaker, stops water in your garden lines from being drawn back into your home's drinking water. Many local plumbing codes require one. Simple hose-thread models are inexpensive and easy to add.

Filter

Emitters have very small openings. A screen or disc filter catches sand, scale and debris that would otherwise clog them. Choose a filter with a fine mesh and a cap you can open for cleaning. Clean it at the start of each season and whenever flow seems weak.

Pressure regulator

Household water pressure is often higher than the pressure drip fittings and emitters are designed for. A pressure regulator brings it down to a suitable level, protects fittings from blowing apart and keeps flow even. Choose one sized for the flow your system will use.

Hose or tubing adapter

The adapter connects the head assembly to the drip mainline. Adapters come in hose-thread, pipe-thread and compression or barbed styles to match your tubing.

Part 2: Tubing

Mainline tubing

Mainline, usually around 1/2 inch, carries water along beds and rows. One important detail: outside diameters vary between brands, so buy fittings from the same brand or confirm they match your tubing's exact size.

Micro tubing

1/4 inch micro tubing branches off the mainline to individual plants, pots or hanging baskets. Keep these runs short, generally just a few feet, so each plant gets a consistent flow.

Emitter tubing

Inline emitter tubing has drippers built in at set spacing, such as every 6, 12 or 18 inches. It is ideal for vegetable rows, raised beds and hedges, because you lay the line and water is delivered evenly along it without punching holes or adding individual emitters.

Part 3: Emitters

Emitters are rated in gallons per hour. Choosing the right flow for each plant is covered in our guide on what size drip emitter to use for plants. In general, small annuals and vegetables get lower-flow emitters, while shrubs and trees get several emitters or higher-flow bubblers spread around the root zone.

Pressure-compensating emitters deliver nearly the same flow regardless of pressure changes, which matters on slopes and long runs. They cost a little more but make a system far more even.

Part 4: Fittings and accessories

• Tees and elbows split or turn the mainline.
• Couplings join two lengths of tubing.
• End caps or figure-eight end closures seal the end of each line and can be opened for flushing.
• Goof plugs seal holes punched in the wrong place.
• Barbed connectors connect 1/4 inch micro tubing to the mainline.
• Hole punch for inserting emitters and connectors cleanly.
• Tubing stakes hold lines in place on the soil.
• Flush valves at line ends make seasonal flushing easy.

How to size your drip irrigation parts list

1. Sketch the garden and measure the length of each bed or row.
2. Plan the mainline route, keeping it as short and simple as possible.
3. Count plants and decide which get individual emitters and which are better served by emitter tubing.
4. Add up the flow of all emitters on one zone and make sure it is within the capacity of your regulator and supply. Long systems may need to be split into zones.
5. List fittings for every turn, branch and end.
6. Add 10 percent to tubing lengths and fittings for mistakes and adjustments.

A complete kit can simplify the first system. Our guide to the best drip irrigation kit compares kits with all the core parts included.

Sample parts lists for common projects

Two 4×8 raised beds

• Hose timer, backflow preventer, filter and pressure regulator
• Hose-thread adapter to 1/2 inch mainline
• About 25 feet of 1/2 inch mainline to reach and connect both beds
• About 60 feet of inline emitter tubing, laid in runs about 12 inches apart
• Tees, elbows and couplings to connect the emitter runs to the mainline
• End caps or figure-eight closures for every run
• A handful of tubing stakes

A 30-foot vegetable row garden with four rows

• Head assembly as above
• 1/2 inch mainline across the top of the rows
• About 130 feet of inline emitter tubing for four rows, with emitter spacing matched to the crops (closer for carrots and greens, wider for tomatoes and squash)
• Four tees or barbed takeoffs from the mainline, and end closures

A patio with twelve containers

• Head assembly as above
• 1/2 inch mainline around the patio edge, or hidden behind pots
• Twelve barbed connectors and short lengths of 1/4 inch micro tubing
• One or two pressure-compensating emitters per pot, depending on pot size
• Stakes to hold emitters in each container

A shrub border

• Head assembly as above
• 1/2 inch mainline along the border
• Two to four pressure-compensating emitters or adjustable bubblers per shrub, placed around the root zone
• Extra emitters to add as shrubs grow

Seasonal care for drip parts

At the start of the season, open the end caps and flush each line until the water runs clear, then clean the filter screen. Walk the system while it runs and look for dry plants, puddles or spraying fittings. In cold climates, disconnect the head assembly before the first hard freeze, drain the lines and store the timer, filter and regulator indoors, since water left inside can crack them.

Connecting to a hose bib

Most home systems start at an outdoor faucet. Thread on the timer, then the backflow preventer, filter and regulator, followed by a hose adapter to the mainline. For a step-by-step look at this connection, see how to connect drip irrigation to a garden hose.

Upgrades worth adding later

• A multi-outlet manifold at the faucet lets you run drip and a garden hose from the same spigot.
• A second timer channel or a multi-zone timer lets you water vegetables and containers on different schedules.
• A soil moisture sensor or rain sensor for smart timers skips watering when the soil is already wet.
• Ball valves on branch lines let you shut off one bed without affecting the rest.
• Pressure gauges at the end of long runs confirm the system is working within its intended range.

These additions are optional, but they make a growing system easier to manage as you add beds and containers.

How long to run a drip system

Run time depends on the emitter flow, soil type and plants. A useful starting point is to run the system long enough to wet the root zone, then check with a trowel a few hours later: soil should be moist down to where roots grow. Sandy soil needs shorter, more frequent cycles; clay soil needs longer, less frequent ones. Adjust through the season as plants grow and weather changes.

Maintenance parts to keep on hand

• Spare emitters in the flow rates you use
• A few couplings, tees and goof plugs
• An extra filter screen or cartridge
• A hole punch and a length of mainline
• Tubing stakes

Buying parts individually vs in a kit

Kits are convenient for a first small system because the parts are guaranteed to match. Buying individually makes sense once you know exactly what you need, for larger gardens, or when expanding an existing system, and it lets you choose higher-quality filters and pressure-compensating emitters.

Common parts mistakes

• Skipping the filter or pressure regulator.
• Mixing fittings from different tubing standards.
• Running 1/4 inch micro tubing too far.
• Using non-compensating emitters on a slope.
• Forgetting end caps or flush valves.
• Putting too many emitters on one zone for the available flow.

The EPA WaterSense program offers more guidance on efficient outdoor watering, including drip irrigation.

Drip irrigation guides by topic

Each part of a drip system has its own detailed guide:

• Getting started: drip irrigation vs sprinkler, benefits of drip irrigation and how to choose a drip irrigation kit.
• Connecting the water: drip irrigation head assembly and connecting drip irrigation to a garden hose.
• Design and installation: drip emitter size, how deep to bury drip line and how to install drip tape.
• By garden type: vegetable gardens, raised beds, flower beds, herbs and trees and shrubs.
• Converting sprinklers: convert sprinkler to drip.
• Running the system: how long to run drip irrigation.
• Fixing problems: clogged drip irrigation.

The bottom line

A complete drip irrigation parts list includes a head assembly (timer, backflow preventer, filter and pressure regulator), mainline tubing, micro tubing or emitter tubing, emitters sized to each plant, and fittings, end caps and stakes. Match all fittings to your tubing's exact diameter, keep micro tubing runs short, use pressure-compensating emitters on slopes and long runs, and stay within your supply's flow. With the right parts in hand, installation is a simple afternoon project.

Frequently Asked Questions