As spring approaches, it’s essential to inspect your irrigation systems to see how winter conditions impacted them. One of the most critical components to check is the backflow preventer. This device protects your drinking water supply by keeping contaminated irrigation water from flowing backward into the main system. If it cracks, it can leak, waste water, and even cause potential compliance issues.
Learn how to diagnose and repair a cracked backflow preventer to maintain a safe, efficient irrigation system year-round.
Common Causes of Backflow Preventer Cracks
Several factors can damage a backflow preventer, including:
- Freeze damage: This issue is common in cold climates. Water expands when it freezes, and if the backflow preventer is not properly winterized, trapped water can crack the internal components or casing.
- High water pressure: Sudden pressure spikes within your water system can place immense stress on the device, leading to fractures over time.
- Age and wear: As they age, backflow preventers can become brittle and susceptible to stress cracks, especially after years of exposure to outdoor elements.
How to Inspect Your Backflow Preventer for Cracks
This inspection usually takes only a few minutes and helps determine whether your system is safe to restart.
Here’s what you’ll need:
- Flashlight or headlamp
- Clean dry cloth
- Adjustable wrench for gently checking fittings
- Phone or camera to document damage
Here’s what to do:
- Clear the area: Remove mulch, dirt, leaves, or anything covering your backflow preventer. You need to be able to see the main body, both valves on top, all the pipe connections, and the area where it meets the ground at the bottom.
- Inspect the body for cracks: Look at the main metal housing for any cracks, breaks, splits, or places where the metal looks bent. Pay extra attention to the corners and where pipes connect to the unit.
- Check the rubber parts: If you notice any deterioration signs, like cracks, hardness or brittleness, the backflow preventer should be replaced before the irrigation season begins. Failed seals can allow contaminated water to enter your home’s water supply.
Can You Repair a Cracked Backflow Preventer?
It’s best to replace a cracked backflow preventer as it cannot reliably prevent contaminated water from flowing backward. However, at-home patch repairs, such as sealing the crack with epoxy, are temporary at best, and can build up pressure in the unit, worsening the cracks or causing fittings to fail.
If a DIY repair fails and causes water contamination, you could be responsible for damages. You might also have to spend more on correcting issues that violate local plumbing codes. Working with a professional who understands how irrigation systems work can help you avoid additional pipe damage, water waste, and compliance violations.
When to Call for Emergency Backflow Repair
Some backflow preventer problems require immediate professional attention to protect your water supply and prevent property damage. You should treat the situation as urgent if you notice:
- Cracks or splits in the body of the device
- Any kind of leaking
- Discolored or murky water
- Unpleasant odors or strange tastes in your drinking water
- Sudden drops in water pressure
- Water entering nearby structures, control boxes, or electrical areas
In case of an emergency, shut off the irrigation system or the nearest water supply valve, then contact a licensed plumber immediately.
How to Prevent Your Backflow Preventer From Cracking
The best way to protect your entire irrigation system is through routine maintenance. The following preventive measures can minimize sudden problems with your backflow preventer:
- Professional winterization: The most effective way to prevent freeze damage is to have a professional properly winterize your irrigation system each fall. This process removes all water from the lines, including the backflow preventer, to prevent freezing and expansion.
- Pressure monitoring: Have your irrigation system’s water pressure tested and monitored regularly to avoid strain cracks.
- Regular inspections: In addition to spring system startups, check your irrigation system periodically throughout the season. Spotting small leaks, loose fittings, or wear early can prevent larger, more costly problems later.
Leave Backflow Preventer Repair to Green and Black
If you suspect that your backflow preventer is cracked, contact Green and Black. Our team specializes in property maintenance services, including irrigation system services for businesses and homes in Cherry Valley and south of the Twin Cities. Call our team at 651-356-9193 or request a free quote online and we’ll diagnose and fix your backflow preventer issue.
