Do Rainbird sprinklers have filters?

Rainbird sprinklers are a popular brand of irrigation system used for watering lawns and gardens. A common question homeowners have is whether Rainbird sprinklers have filters that need to be maintained and replaced. The short answer is yes, most Rainbird sprinklers do have filters that require occasional cleaning or replacement.

Why do Rainbird sprinklers have filters?

Filters are an important component in most sprinkler systems. They serve to prevent debris, dirt, and sediment from entering the sprinkler heads and valves. Over time, buildup of these materials can cause the sprinkler system to clog or the heads to become stuck. The filters act as a barrier to catch this debris before it reaches the inner workings of the system.

Some key reasons why Rainbird and most other sprinkler brands utilize filters include:

• To prevent clogging of the sprinkler heads – Small particles like dirt or sand can get lodged in the tiny nozzles of sprinkler heads and prevent water flow. Filters catch this grit before it reaches the heads.
• To protect the valves – Valves also contain small openings and passages that are susceptible to clogging from debris. Filters help keep sediment from reaching the valves.
• To reduce wear – Sprinkler components like valves, seals, and moving parts face less wear and tear when protected from sediment and grit by filters.
• To prevent staining – Sprinkler water may contain minerals or sediments that can cause unsightly spots and stains on fences, buildings, cars, etc. Filters capture much of this material.

By installing filters, Rainbird and other sprinkler brands can help their systems provide optimum performance and lifespan.

What types of filters are used in Rainbird sprinklers?

There are several common types of filters used in Rainbird sprinklers and irrigation systems:

Screen filters

Screen filters consist of a simple mesh screen made from stainless steel or durable plastic. They have small perforations that allow water to pass through while catching larger debris. Screen filters are inexpensive and easy to clean by simply spraying off the accumulated debris.

Disk filters

Disk filters use a series of spinning plastic disks to strain water through very fine slots. The slots allow water flow but block even tiny particles. Disk filters self-clean to some degree with the spinning action forcibly removing debris off the disk surfaces.

Sand media filters

Sand media tanks contain layered beds of graded sand or gravel media. Water is filtered as it flows down through the media, which traps progressively smaller particles in each layer. Some media filters backwash on occasion to flush out collected debris.

Cartridge filters

Cartridge filters use disposable cylindrical filter cartridges made of porous media to screen out particles and sediment. When the cartridge becomes clogged, it is simply replaced. Cartridges come in various pore sizes to filter different particle sizes.

The type of filter used depends on factors like the water source, system size, and budget. Larger systems may utilize larger sand media filters, while smaller systems often use simple screen or disk filters.

Where are the filters installed in Rainbird sprinklers?

Filters can be installed in various locations within a Rainbird sprinkler system. Common placement options include:

• At the point of water entry – Either on the main water supply line or just after the backflow preventer. This filters debris from the initial water source before it enters the system.
• On zone valves – Filters may be built into each zone valve assembly to protect the valves and downstream heads.
• At each sprinkler head – Some sprinkler heads have small filters integrated into their base to screen water immediately before it exits the nozzle.
• At the ends of lateral lines – Lateral line filters help capture debris before it reaches the heads at the ends of long pipe runs.

Installing filters at multiple locations provides overlapping protection from debris at key points throughout the system.

How often do Rainbird sprinkler filters need cleaning or replacement?

The maintenance needs of Rainbird filters depends on factors like:

• – The amount of debris and sediment in the water source
• – How frequently the system runs
• – The type of filtration used
• – The size of the irrigation system

As a general guideline:

• Screen filters should be inspected and cleaned off annually.
• Disk filters may need cleaning 2-3 times per year, depending on conditions.
• Sand media tanks should be backwashed 1-2 times per year.
• Cartridges should be replaced when pressure drop indicates plugging, typically every 1-3 years.

It’s a good idea to check filters when conducting seasonal start-up and winterization of the irrigation system. Catching a heavily clogged filter at this time can prevent problems when the system is put back into use. Checking flow rates across the filter is one way to diagnose excessive buildup.

Steps for cleaning Rainbird filter screens and housings

Here is a step-by-step guide to cleaning screen-type filter elements in Rainbird sprinklers:

1. Turn off the water supply and relieve any pressure in the pipes.
2. Unscrew the filter housing to access the screen filter inside.
3. Remove the screen filter and spray it off with a hose or rinse under running water.
4. Use a soft brush to gently scrub away any stuck-on deposits.
5. Check the filter screen for damage like tears, holes, or cracked plastic.
6. If the filter is broken, replace with a new one of the same size.
7. If intact, return the cleaned screen filter to the housing.
8. Inspect the o-ring seal and lubricate with waterproof grease if dried out.
9. Screw the housing back together hand-tight.
10. Slowly turn the water back on and check for leaks.
11. If leaks occur, turn off water, disassemble, check o-ring, then reassemble.

The cleaning steps are similar for disk-type filters. Always consult the manufacturer’s instructions when servicing Rainbird filtration components.

Replacing cartridge filters in Rainbird sprinklers

To replace cartridge-style filter inserts in Rainbird sprinkler systems:

1. Shut off the water supply and open any bleed or drain valves to relieve pressure.
2. Unscrew the filter housing using the appropriate sized wrench.
3. Slide out the old cartridge filter, checking for any cracks or damage.
4. Inspect inside the housing and remove any debris.
5. Insert the new replacement cartridge of the same model.
6. If using multiple filters, replace all at the same time.
7. Grease the housing o-ring and ensure it is properly seated.
8. Screw the housing back on hand-tight, then use a wrench to finish tightening.
9. Slowly turn on the water and check for leaks.

Be sure to lubricate the o-ring and follow torque specifications when re-assembling filter housings. Dispose of used cartridges properly.

Troubleshooting common Rainbird filter problems

Some issues that may arise with Rainbird irrigation filters include:

Clogged filters

Clogged filter elements is the most common maintenance issue. This causes low pressure and reduced sprinkler output. Clean or replace filters if flow is restricted.

Leaking filters

Filters can leak from the housing if the o-ring seal is dry or damaged, or if the housing is loose. Try re-greasing and tightening to the proper torque.

Damaged filters

Sprinklers may pulsate or surge if filter screens are torn or cartridges cracked. Inspect closely and replace any damaged filter parts.

Missing filters

Sprinkler systems may plug up frequently if filters are absent from key locations. Check that all filter components are present.

Always start troubleshooting with a visual inspection of the filters. Note any missing parts, clogging, cracks, or improper assembly. Cleaning and new parts can often return the filters to proper working order.

Conclusion

In summary, most Rainbird sprinklers do contain filtration components as an important part of their irrigation systems. Typical filters include screen, disk, sand media, and replaceable cartridges. These filters require periodic inspection and cleaning or replacement, such as at seasonal start-up. Clogged filters are the most common maintenance issue. Catching problems early maximizes sprinkler performance. With regular filter upkeep, Rainbird sprinklers can provide many years of peak operation.