How to Convert Sprinkler to Drip Irrigation? Retrofit Kit

Introduction

Traditional sprinkler systems are a common staple of residential landscaping, but they come with significant downsides: they waste thousands of gallons of water annually through evaporation, runoff, and overspray on sidewalks and driveways, lead to higher monthly water bills, and can even damage plants by wetting leaves and promoting fungal diseases. If you’re looking to cut water waste, lower your utility costs, and give your plants more consistent, targeted hydration, you may be wondering How to Convert Sprinkler to Drip Irrigation? without the cost and hassle of ripping out your entire existing sprinkler system. The good news is that a sprinkler to drip irrigation retrofit kit makes this conversion fast, affordable, and DIY-friendly, even for homeowners with minimal plumbing experience. This comprehensive guide will walk you through every step of the process, from choosing the right kit for your yard to installing your new system, avoiding common mistakes, and keeping it running smoothly for years to come.

• Why Convert Sprinkler Systems to Drip Irrigation?
• What Is a Sprinkler to Drip Irrigation Retrofit Kit?
• Benefits of Using a Retrofit Kit vs Full Replacement
• How to Choose the Right Retrofit Kit for Your System
• Tools and Materials You’ll Need for the Conversion
• Step-by-Step Guide: How to Convert Sprinkler to Drip Irrigation with a Retrofit Kit
• How to Adjust Your Drip Irrigation System for Different Plant Types
• Maintaining Your New Drip Irrigation System
• Tips and Best Practices for Long-Term Success
• Common Mistakes to Avoid During Conversion
• Cost Breakdown: Is Converting to Drip Worth It?
• Frequently Asked Questions
• Conclusion

Why Convert Sprinkler Systems to Drip Irrigation?

Before diving into the conversion process, it’s helpful to understand the key benefits of switching from spray sprinklers to drip irrigation, which make the effort well worth your time. Traditional sprinklers spray water high into the air, where up to 50% of it can evaporate before it even reaches the ground, especially on hot, windy days. They also often overspray onto non-plant areas like patios, driveways, and sidewalks, wasting even more water. In contrast, drip irrigation delivers water slowly and directly to the root zone of your plants, where it is needed most, reducing water waste by 50-70% for most residential landscapes.

Beyond water savings, drip irrigation also promotes healthier plant growth. Because water is applied directly to the soil rather than wetting leaves and stems, you’ll see far fewer cases of fungal diseases like powdery mildew and leaf spot, which are common with overhead sprinklers. Drip systems also reduce soil erosion and nutrient runoff, as water is applied slowly enough to be absorbed into the soil rather than running off the surface. For sloped yards, drip irrigation eliminates the uneven watering that comes with sprinklers, where water runs downhill and pools at the bottom of the slope, leaving plants at the top dry. Many local water districts even offer rebates of $50 to $200 for homeowners who convert to drip irrigation, further offsetting the cost of the project.

What Is a Sprinkler to Drip Irrigation Retrofit Kit?

A sprinkler to drip irrigation retrofit kit is a pre-assembled collection of components designed to adapt your existing underground sprinkler system to run low-flow drip tubing and emitters, without requiring you to dig up your entire yard or replace your timer, backflow preventer, or main supply lines. These kits are sized to match the number of zones in your existing sprinkler system, so a 4-zone kit will work for a system with 4 separate sprinkler zones, each controlled by its own timer setting.

Standard components included in most retrofit kits include a pressure regulator (to reduce water pressure to the 25-30 PSI range required for drip tubing), a mesh filter (to prevent debris from clogging emitters), a barbed adapter to connect the kit to your existing sprinkler riser, rolls of UV-resistant drip tubing, various types of emitters (fixed, adjustable, or pressure-compensating), end caps to seal the end of tubing lines, and landscape staples to secure tubing in place. Some premium kits also include quick-connect fittings for easy adjustments, or inline drip tubing with pre-installed emitters for large vegetable beds.

Benefits of Using a Retrofit Kit vs Full Replacement

Many homeowners assume that converting to drip irrigation requires a full system replacement, which can cost thousands of dollars and require days of professional installation. A retrofit kit eliminates most of these barriers, offering a far more accessible option for most residential properties. To help you decide if a retrofit is right for you, compare the key differences between using a retrofit kit and replacing your entire sprinkler system below.

As the table shows, a retrofit kit offers far lower upfront costs, minimal yard disruption, and faster installation, while delivering the same water savings as a full replacement. For most homeowners, a retrofit is the most practical choice unless their existing sprinkler system is severely damaged or outdated.

How to Choose the Right Retrofit Kit for Your System

Not all retrofit kits are created equal, so it’s important to select one that matches your existing sprinkler system and landscaping needs. Keep these key factors in mind when shopping for a kit:

Match Your Zone Count

Start by counting the number of zones in your existing sprinkler system – each zone is a group of sprinkler heads that run on the same timer setting. Most kits are sold in 4-zone, 8-zone, or 12-zone configurations, so choose a kit that matches or exceeds your zone count to avoid running out of parts. If you have a 6-zone system, an 8-zone kit will work perfectly, as you can simply leave the extra parts unused.

Check Your Water Pressure

Most residential drip kits work with standard water pressure of 30-50 PSI, which is the typical range for most city water supplies. If you have a well or live in an area with high water pressure (over 60 PSI), look for a kit that includes a high-pressure regulator, or purchase a separate regulator to avoid bursting your drip tubing.

Select the Right Emitter Type

Emitters control how much water each plant receives, so choose a type that matches your landscaping:

• Fixed emitters: Deliver a set amount of water (usually 1, 2, or 4 gallons per hour) and are ideal for uniform plantings of the same species, like vegetable rows or mass flower beds.
• Adjustable emitters: Let you control the flow rate from 0-10 gallons per hour, perfect for mixed plantings with different water needs, like a flower bed with both drought-tolerant succulents and water-loving annuals.
• Pressure-compensating emitters: Deliver the same flow rate regardless of changes in water pressure, making them essential for sloped yards where pressure varies along the length of the tubing.

Look for UV-Resistant Tubing

If you live in a sunny climate with high UV exposure, choose a kit with UV-resistant polyethylene tubing, which will resist cracking and degradation from sun exposure, extending the lifespan of your system by several years.

Tools and Materials You’ll Need for the Conversion

Most sprinkler to drip irrigation retrofit kits include all the specialized parts you need for the conversion, but you will need a few basic tools and optional extra supplies to complete the project:

Required Tools

• Adjustable wrench or pipe wrench
• Phillips and flathead screwdrivers (for removing sprinkler heads)
• Pipe cutter or fine-toothed hacksaw
• Plumber’s (Teflon) tape
• Measuring tape and permanent marker
• Work gloves and safety glasses

Optional Extra Materials

• Extra rolls of drip tubing (for large yards or additional planting beds)
• Additional emitters (if you add new plants after installation)
• Landscape fabric staples (to secure tubing in high-wind areas)
• Compressed air (to blow out lines in freezing climates for winter storage)

If your existing sprinkler timer does not have a dedicated “drip” or “micro” setting, you may also want to purchase a separate drip irrigation timer, which is programmed for the longer, less frequent run times that drip systems require.

Step-by-Step Guide: How to Convert Sprinkler to Drip Irrigation with a Retrofit Kit

Once you have your kit and tools ready, follow these 10 simple steps to complete your conversion in just a few hours. This step-by-step guide for How to Convert Sprinkler to Drip Irrigation? works for most standard residential sprinkler systems.

1. Shut off the water supply and drain the lines. Locate the main shut-off valve for your sprinkler system (usually near your water meter or the point where the sprinkler line connects to your home’s main water supply) and turn it fully clockwise to stop water flow. Then, turn on one of your existing sprinkler heads to drain any remaining water from the lines, which will prevent a mess when you remove the head.
2. Remove the existing sprinkler head. Use your wrench to loosen the nut holding the sprinkler head to the riser (the vertical pipe sticking up from the ground). Twist the head off by hand once the nut is loose, and set it aside for storage or donation. Leave the riser in place – you will attach the retrofit adapter directly to it.
3. Install the retrofit adapter. Most retrofit adapters screw directly onto the exposed riser threads. Wrap 2-3 layers of plumber’s tape around the riser threads in a clockwise direction to create a watertight seal, then screw the adapter on by hand. Tighten it an additional quarter turn with your wrench – do not overtighten, as this can crack the plastic adapter and cause leaks.
4. Attach the pressure regulator and filter. Screw the pressure regulator (included in your kit) onto the adapter first, followed by the mesh filter. Make sure the flow direction arrow on the filter points toward the drip tubing, not the water supply. The pressure regulator reduces water pressure to the safe 25-30 PSI range for drip tubing, while the filter catches debris like sediment and rust that could clog your emitters.
5. Connect the main drip tubing. Most kits include a barbed adapter that pushes into the end of the main drip tubing. Push the tubing firmly onto the adapter, and secure it with a hose clamp if one is included. Run the tubing along the base of the plants you want to water, following the edge of planting beds to keep it out of high-traffic areas. Avoid kinking the tubing as you lay it, as this can block water flow.
6. Cut tubing and install emitters. Use your pipe cutter to cut the tubing to the desired length at each plant location. For shrubs and trees, push a 1-gallon per hour emitter into the tubing 12 inches from the base of the plant, at the edge of the plant’s canopy (the drip line) to encourage deep root growth. For vegetable beds, use inline drip tubing with pre-installed emitters spaced 12-18 inches apart, or install individual emitters along the length of the tubing. Seal the end of the tubing line with an end cap, included in most kits.
7. Secure the tubing in place. Use the included landscape staples to pin the tubing to the ground every 2-3 feet, and at all corners and connection points. This prevents the tubing from shifting when you water, during yard work, or in high wind. For areas where the tubing crosses a walkway or driveway, you can run it through a small section of PVC conduit to protect it from damage.
8. Pressurize the system and check for leaks. Turn the main water supply back on slowly, then walk along the length of the tubing and check all connections for leaks. If you see a small drip at a connection, tighten the fitting slightly with your wrench. Avoid overtightening, as this can crack plastic parts.
9. Flush the system to remove debris. Turn on each zone of the system for 1-2 minutes before installing the final emitters, to flush out any debris that may have gotten into the tubing during installation. This step prevents clogs in your emitters later on.
10. Program your timer for drip irrigation. Unlike sprinklers, which run for 10-15 minutes daily, drip systems need longer, less frequent watering to soak the root zone deeply. Start with 30-60 minute run times, 1-2 times per week, and adjust based on your climate, soil type, and plant needs. Set the timer to run early in the morning (before 8 a.m.) to minimize evaporation loss. If your timer has a “drip” or “micro” setting, use that for optimal performance.

Once you’ve completed these steps, run a full test cycle to make sure all emitters are dripping evenly and all plants are receiving adequate water. You can adjust emitter placement or add extra emitters for larger plants as needed.

How to Adjust Your Drip Irrigation System for Different Plant Types

One of the biggest advantages of drip irrigation over traditional sprinklers is the ability to customize water delivery for different plants in your landscape. Here’s how to adjust your system for the most common planting types:

Vegetable Gardens

For annual vegetable gardens, use inline drip tubing with emitters spaced 12 inches apart, which is ideal for most row crops like tomatoes, peppers, lettuce, and carrots. Set your timer to run 2-3 times per week for 30-45 minutes per cycle, depending on your climate, to keep the top 6-8 inches of soil consistently moist. For raised beds, you can run tubing in a grid pattern to ensure even watering across the entire bed.

Flower Beds and Shrubs

For mixed flower beds and shrubs, use adjustable emitters so you can tailor water delivery to each plant’s needs. Place emitters at the drip line (the outer edge of the plant’s canopy) to encourage roots to grow outward, rather than staying close to the trunk. Drought-tolerant plants like lavender and succulents only need 1-2 emitters set to low flow, while water-loving plants like hydrangeas may need 2-3 emitters set to higher flow. For ground cover plants, space emitters 6-12 inches apart along the bed.

Trees and Large Plants

Newly planted trees (less than 3 years old) need consistent, deep watering to establish strong root systems. Install 2-4 pressure-compensating emitters per tree, placed 12-18 inches from the trunk in a circle around the base. Set your timer to run 1 time per week for 60-90 minutes, to encourage roots to grow deep into the soil. Mature established trees only need supplemental watering during drought conditions, so you can add a separate valve to their drip line to water them independently of other plants.

Maintaining Your New Drip Irrigation System

A drip irrigation system requires very little maintenance compared to traditional sprinklers, but a few simple tasks a few times per year will keep it running efficiently for its full 5-10 year lifespan.

Monthly Maintenance

Each month, walk your yard and check for clogged emitters: if an emitter is not dripping, unscrew it and rinse the mesh filter inside with water, or replace it with a new emitter if it is damaged. Check all tubing connections for leaks, and tighten any loose fittings. Also, check that landscape staples are still holding the tubing in place, and re-secure any sections that have shifted.

Seasonal Maintenance

If you live in a climate with freezing winter temperatures, you will need to winterize your drip system to prevent damage from frozen water. In late fall, turn off the water supply to the system, open all zone valves to drain remaining water, and use compressed air to blow out any leftover water from the tubing lines. You can either leave the tubing in place (if it is buried under mulch) or roll it up and store it indoors for the winter. In early spring, reconnect the system, flush the lines by running each zone for 2-3 minutes to clear out any debris that built up over winter, and check for any cracked or damaged tubing that needs to be replaced.

Tips and Best Practices for Long-Term Success

To get the most out of your new drip irrigation system and avoid common issues, follow these expert tips and best practices:

• Start with a test run before covering tubing: After installing all emitters, run the system for 10-15 minutes and check that each plant is receiving the right amount of water. Adjust emitter placement or flow rates as needed before covering the tubing with mulch, which can make adjustments difficult later.
• Use a soil moisture meter to fine-tune watering schedules: Instead of guessing how often to water, use a cheap soil moisture meter to check the moisture level at the root zone of your plants. Water only when the top 2-3 inches of soil are dry, to avoid overwatering.
• Add a rain sensor to your timer: A rain sensor will automatically skip watering cycles if it detects recent rainfall, preventing overwatering and saving even more water. Most standard sprinkler timers have a port for a rain sensor, which costs $20-$30 and takes 5 minutes to install.
• Group plants with similar water needs on the same zone: If you have a large yard with diverse plantings, install separate valves for drought-tolerant plants, vegetables, and water-loving shrubs, so you can water each group on a different schedule. This prevents overwatering drought-tolerant plants or underwatering thirsty vegetables.
• Inspect your system after severe weather: High winds, heavy rain, or yard work can shift tubing or damage emitters. After a storm or landscaping project, walk your yard and check for leaks, loose tubing, or clogged emitters to fix small issues before they become big problems.

These simple practices will help your system run efficiently for its full lifespan, maximizing water savings and plant health with minimal effort.

Common Mistakes to Avoid During Conversion

Even a simple DIY project like converting your sprinklers to drip can run into problems if you make these common, avoidable mistakes:

1. Overtightening fittings: Plastic adapter and tubing fittings only need to be tightened by hand plus a quarter turn with a wrench. Overtightening will crack the plastic, leading to leaks that are difficult to fix. If a fitting leaks after tightening, add an extra layer of plumber’s tape instead of tightening further.
2. Using non-pressure-compensating emitters on sloped yards: Standard emitters release more water at lower elevations where water pressure is higher, leading to overwatering at the bottom of the slope and underwatering at the top. Always use pressure-compensating emitters for sloped landscapes to ensure even water delivery.
3. Programming the timer like a traditional sprinkler system: Sprinklers run for short, frequent cycles to wet the soil surface, but drip systems need longer, less frequent cycles to soak water deep into the root zone. If you keep your old sprinkler timer settings, your plants will not get enough water. Start with 30-60 minute run times 1-2 times per week, and adjust based on soil moisture levels.
4. Running tubing across high-traffic areas without protection: Standard drip tubing is not designed to withstand being stepped on or driven over, which will cause it to tear and leak. Run tubing along the edge of planting beds or walkways, and use PVC conduit or rubber hose protectors where it crosses high-traffic areas.
5. Skipping the filter: The mesh filter included in your kit is essential for preventing clogs in your emitters. Even small amounts of sediment in your water supply can build up in emitters over time, causing them to stop working. Clean the filter monthly by unscrewing it and rinsing it under running water.
6. Not flushing the system after installation: Small pieces of tubing or debris can get stuck in emitters during installation, causing them to clog immediately. Run the system for 1-2 minutes after installing all emitters but before securing the end caps, to flush out any loose debris.

Cost Breakdown: Is Converting to Drip Worth It?

One of the most common questions homeowners have when considering How to Convert Sprinkler to Drip Irrigation? is whether the upfront cost is worth the long-term savings. Let’s break down the numbers to help you decide.

The upfront cost of a DIY retrofit kit ranges from $100 to $500, depending on your yard size and number of zones. A full professional replacement costs $1,500 to $5,000 for most residential properties, making a retrofit 75-90% cheaper upfront.

Long-term savings are even more significant. Drip irrigation reduces water use by 50-70% compared to sprinklers, leading to average annual savings of $300 to $800 on water bills, depending on local rates and yard size. Over the 5-10 year lifespan of a drip system, that adds up to $1,500 to $8,000 in total savings, far outweighing the initial kit cost. You’ll also save on plant replacement costs, as drip reduces plant stress from overwatering, and many homeowners see reduced fertilizer and pesticide use as plants grow healthier.

Many local water districts offer rebates of $50 to $200 for converting to drip, further lowering upfront costs. In most cases, a retrofit kit pays for itself in 1 to 2 years through water savings alone, making it a worthwhile investment for most homeowners.

Frequently Asked Questions

Can I convert my sprinkler to drip myself?

Yes, absolutely. Sprinkler to drip irrigation retrofit kits are specifically designed for DIY installation, with all parts included and clear instructions. The process takes 2 to 6 hours for most residential yards, and only requires basic tools like a wrench and pipe cutter. No special plumbing experience is needed, as all connections are simple screw-on or push-in fittings.

Do I need to dig up my yard to convert to drip?

No, one of the biggest advantages of using a retrofit kit is that you do not need to dig up your entire yard. You only need to dig a small 6-inch hole around each existing sprinkler head to remove it and attach the retrofit adapter. The drip tubing is laid on top of the soil, so no extensive trenching is required. You can even cover the tubing with mulch to hide it completely if desired.

How long does a drip irrigation system last?

A properly installed and maintained drip irrigation system lasts 5 to 10 years on average. UV-resistant tubing can last even longer in sunny climates, up to 12 years. Regular maintenance like flushing the system seasonally, cleaning the filter monthly, and replacing clogged or damaged emitters will extend the lifespan of your system significantly.

Will drip irrigation work on a sloped yard?

Yes, drip irrigation works very well on sloped yards, as long as you use pressure-compensating emitters. These emitters are designed to release the same amount of water regardless of changes in water pressure caused by elevation, so you won’t get overwatering at the bottom of the slope and underwatering at the top. You can also install a pressure regulator at the start of the line to keep pressure consistent across the entire system.

Can I use my existing sprinkler timer for drip irrigation?

Yes, most modern sprinkler timers have a dedicated “drip” or “micro” setting that adjusts the run time for low-flow drip systems. If your timer does not have this setting, you can still use it – just program longer run times (30 to 60 minutes per cycle) and less frequent watering (1 to 2 times per week) instead of the short, daily cycles used for traditional sprinklers. For older timers without a drip setting, you can also purchase a separate, inexpensive drip irrigation timer to control your new system independently.

What plants benefit most from drip irrigation?

Drip irrigation is ideal for plants with shallow root systems, including vegetables, annual flowers, shrubs, and newly planted trees. It is also perfect for drought-tolerant plants like succulents and cacti, as you can control exactly how much water each plant receives, avoiding the overwatering that often kills these plants. Drip irrigation is less ideal for large lawns, which are better served by traditional sprinklers that can cover large areas quickly.

Conclusion

Converting your existing sprinkler system to drip irrigation with a retrofit kit is one of the most cost-effective, low-effort upgrades you can make to your residential landscaping. Not only does it cut your water waste by 50-70% and lower your monthly water bills, but it also promotes healthier plant growth by delivering water directly to the root zone, reducing fungal disease and nutrient runoff. The DIY installation process takes just a few hours, requires minimal yard disruption, and costs a fraction of a full system replacement. By following the step-by-step guide for How to Convert Sprinkler to Drip Irrigation? outlined in this article, choosing the right kit for your yard, and avoiding common mistakes, you can enjoy a low-maintenance, efficient irrigation system for 5 to 10 years or more. Whether you’re looking to save money on water bills, reduce your environmental footprint, or grow a healthier garden, a sprinkler to drip retrofit kit is a smart, accessible solution for homeowners of all skill levels.