How do you change a Rainbird sprinkler valve?

Changing a Rainbird sprinkler valve is a straightforward process that can be done in just a few steps. With some basic tools and a little bit of know-how, you can replace a worn-out or malfunctioning sprinkler valve and have your irrigation system working properly again in no time.

When to Change a Sprinkler Valve

There are a few signs that indicate it’s time to replace a sprinkler valve:

• The valve is leaking water when the sprinklers are off
• The valve makes sputtering or chattering noises when operating
• Sections of your lawn or landscaping don’t receive water even though the sprinkler timer is on
• The valve doesn’t open or close fully

Sprinkler valves control the flow of water to different zones in your irrigation system. Like any mechanical component, they wear out over time. Replacing a malfunctioning valve ensures water is distributed evenly and prevents wasteful water leaks.

Turn Off the Water

Before doing any work on your irrigation system, turn off the main water supply. This is usually an outdoor hose bib, gate valve, or curbstop. Turning off the water prevents accidental flooding while you have the system opened up.

Remove the Solenoid

Rainbird valves have an electrical solenoid connected to the top bonnet assembly. Remove the solenoid by unscrewing the bonnet and lifting it out. You may find debris or mineral buildup on the diaphragm inside the solenoid. Set it aside to clean later.

Unscrew the Valve

Use a large pair of tongue-and-groove pliers or a pipe wrench to unthread the valve body from the PVC pipe fittings. Turn the valve counterclockwise to unscrew it. Have a bucket ready to catch any residual water still in the pipes.

Inspect and Clean

With the valve removed, inspect the interior components. Look for wear on the diaphragm and any debris that may have accumulated. Use a stiff nylon brush to gently scrub mineral deposits off the diaphragm. Avoid using metal tools that could damage the rubber.

Install New Valve

Apply a layer of Teflon tape to the threads of the new valve. Make sure the flow arrow on the valve body points in the proper direction. Thread the valve clockwise into the PVC fittings, tightening by hand first and then finishing tight with pliers. Do not over-tighten.

Replace Solenoid

Insert the cleaned solenoid plunger back into the valve bonnet. Screw the bonnet assembly back onto the valve. Be careful not to cross-thread it. Connect the control wires to the solenoid electrical terminals.

Turn Water Back On

Slowly turn the main water supply back on. Open nearby hose bibs and sprinkler heads to allow air to bleed out of the system. Check for leaks around the new valve. You may need to tighten fittings if any drips appear.

Test the Valve

Turn on the sprinkler controller for the zone with the new valve. The valve should open with a click, allowing water to pass through the heads. Turn the system off to stop the flow. The valve should close tightly with no drips.

Flush the Lines

Run each zone with the new valve for 5 minutes. This flushes any debris that may have gotten into the pipes during the replacement process. Sprinkler heads downstream should operate normally with no clogs or obstructions.

With a brand new valve installed, your sprinkler system will run like normal again. Valves typically last 5-10 years before needing replacement, depending on water quality and operating conditions. Adding a water filtration system can prolong valve and component life.

Troubleshooting Tips

If you encounter any problems after installing a new valve, here are some steps to take:

• Ensure the flow arrow is pointing in the correct direction for water flow
• Check for leaks at fittings and tighten as needed
• Inspect the solenoid for obstructions preventing the plunger from sealing
• Remove and clean out the solenoid valve filter
• Verify the valve size matches the water flow demand for that zone

Replacing a sprinkler valve requires simple tools, a little time, and some irrigation knowledge. With routine maintenance, you can maximize the longevity of your system. But when problems do arise, don’t hesitate to replace damaged valves that are causing leaks or other operational issues.

When to Call a Professional

While DIY sprinkler valve replacement is straightforward, there are some situations when it’s best to call an irrigation professional:

• If pipe fittings won’t seal and continue leaking
• For valves larger than 3 inches in diameter
• When valves are located in difficult to access spots
• If you need to replace corroded or damaged pipes
• For wiring problems with the valve solenoid or sprinkler controller

A certified irrigation specialist will have the skills, tools and experience to handle more complex valve installations and repairs. They can also identify underlying issues that may be shortening valve lifespan.

Cost to Replace a Sprinkler Valve

For DIYers, the main costs are the valve itself and any fittings or parts needed. Expect to pay:

• Rainbird plastic valve: $10 – $30
• Brass or bronze valve: $30 – $70
• Misc fittings, glue, tape: $5 – $10

So figure a total DIY cost of $20 to $100 depending on valve type and other parts required. Replacing an electric solenoid will add about $20 – $50 to the overall cost.

Hiring an irrigation company to replace the valve typically costs $75 to $200 per valve, including parts and labor. Large commercial valves can be over $500 each to replace.

Sprinkler Valve Brands

Some of the leading brands of sprinkler valves include:

• Rainbird – Widely used residential brand, offers mid-price plastic and brass valves.
• Hunter – Another popular home irrigation brand with competitively priced valves.
• Toro – Makes commercial and residential valves in all sizes and budgets.
• Irritrol – Known for durable brass valves for large water flow.
• K-Rain – Specializes in gear-driven sprinkler valves.
• Orbit – Budget-friendly plastic valves for small yard systems.

Choosing a reputable brand you recognize often indicates better quality and longevity. Consult with an irrigation professional to select the appropriate type and size of valve for your specific water flow needs.

Sprinkler Valve Types

Sprinkler valves come in a range of configurations and materials. The most common types are:

• Plastic – Affordable option sufficient for low pressure residential systems. Prone to breaking over time.
• Brass – More durable metal valves that resist wear and corrosion. Require less maintenance.
• Electric – Operate by a solenoid and wired to a control timer or smart controller.
• Manual – Manually turned on/off at the valve itself. No automated control.
• Globe – Valve body designed for straight runs of pipe.
• Angle – Valve suited for fitting into angled 90-degree elbow fittings.
• Gate – Linear sliding gate controls flow. Good for frequent on/off cycling.
• Ball – Flow controlled by a rotating ball inside the valve body.
• Butterfly – Circular disc rotates to open/close, ideal for large commercial systems.
• Diaphragm – Flexible internal diaphragm regulates water flow.

The ideal valve type depends on your water pressure, flow rate, pipe sizes, and desired sprinkler operation. A pro can ensure you get the right valves during new irrigation system design.

Replacing a Valve Box

Buried sprinkler valves are housed within valve boxes. These protective boxes allow access to underground valves for maintenance. Standard sizes are 10″ and 12″ diameter. A broken or damaged box will need replacing along with the bad valve:

1. Dig around the box to access.
2. Remove cover and valve hardware.
3. Lift out old box and dispose.
4. Set new box in the hole.
5. Add gravel for drainage.
6. Replace valve and components in box.
7. Connect pipes to valve.
8. Backfill soil around box.
9. Add new cover.

Having a few extra valve boxes on hand makes replacement much simpler if issues arise.

Conclusion

Replacing old, leaky sprinkler valves keeps your irrigation system operating efficiently. Regular maintenance extends the life of your system and avoids costly repairs down the road. With some DIY knowledge and the right parts, you can swap a bad valve for a new one in under an hour. Pay attention to leaks or zone coverage issues so you can replace problematic valves before bigger problems occur.