Backflow Prevention: Protecting Your Water Supply

Water is life. But only if it's clean. Whether you manage a commercial building or simply care for your family's home, the plumbing running through your walls is like the veins and arteries of your property. A single hiccup—like backflow—can put your health and comfort at risk.

At JJL Plumbing, we've seen how quickly backflow can turn a good day upside down. That's why understanding prevention is more than a technicality—it's a safeguard for everyone who turns on a tap.

What is Backflow? 🚱

Imagine pouring a glass of water straight from your kitchen faucet. You trust it's fresh and safe. But sometimes, pressure changes in your plumbing can pull contaminated water back into your clean supply. That’s backflow—a reversal of normal water movement.

Backflow can be caused by:

• Sudden drops in water pressure (like a broken main or heavy use during firefighting)
• Faulty valves or connections
• Cross-connections between drinking water and sources like irrigation, pools, or boilers

When backflow happens, pollutants—ranging from lawn chemicals to bacteria—can sneak into your water. For both homes and businesses, it’s a real threat. The Environmental Protection Agency (EPA) and local codes require safeguards for this reason.

Why Backflow Prevention Matters

Clean water isn’t a luxury; it’s a necessity. Backflow events can lead to:

• Illness from bacteria or chemicals
• Costly plumbing repairs
• Fines for non-compliance
• Business or home closure until the issue is resolved

Think of a backflow preventer as your plumbing’s goalkeeper. It stands between your water supply and potential contamination—ready for any surprise attack.

Types of Prevention Devices

There’s no one-size-fits-all solution. Different properties and risks call for different devices. Here’s a breakdown:

1. Air Gaps

The simplest method. An air gap is just what it sounds like—a physical space between the end of a water supply outlet and the flood level of a fixture (like the space between your kitchen faucet and the sink). No moving parts. Just gravity at work.

2. Atmospheric Vacuum Breakers (AVB)

Commonly used for garden hoses or irrigation systems. AVBs let air into the line if negative pressure occurs, breaking the suction that could pull contaminants back.

3. Pressure Vacuum Breakers (PVB)

A little more robust than AVBs, these are designed for systems under continuous pressure—like sprinkler setups.

4. Double Check Valve Assembly (DCVA)

Two check valves in a row. If one fails, the second steps up. DCVAs are found in fire sprinkler systems, commercial properties, and larger residential plumbing.

5. Reduced Pressure Zone Assemblies (RPZ)

The heavyweights. RPZs provide the highest protection and are required where contaminants are severe (think chemical plants or medical offices). They include a relief valve to dump water if anything goes wrong.

Choosing the right device depends on your plumbing system, the level of hazard, and local codes. Not sure what you need? That’s where a professional assessment helps.

Installation and Maintenance: What to Expect 🔧

Backflow preventers aren’t a set-it-and-forget-it solution. Like smoke alarms, they need proper installation and regular checkups.

The Installation Process

• Assessment: Every property is unique. We’ll inspect your plumbing, check cross-connections, and identify risk areas.
• Device Selection: Based on local plumbing codes (refer to the International Plumbing Code or Uniform Plumbing Code), we’ll recommend the right device.
• Professional Installation: Devices must be installed at the correct height and orientation. Even a small misstep can leave your property unprotected.
• Initial Testing: After installation, the system is tested per local regulations.

Maintenance Matters

• Annual Testing: Most cities require yearly Backflow Testing. JJL Plumbing handles the paperwork, too.
• Visual Inspections: Check for leaks, corrosion, or unusual sounds.
• Prompt Repairs: Never ignore a failed test or visible issue. Fast action prevents bigger headaches.

When to Upgrade Your Backflow Prevention

Change is constant in plumbing. Here’s when you should consider upgrading:

• Renovations or New Appliances: Adding a pool, irrigation, or new fixtures? Your old device may not be enough.
• Failing Tests: Frequent failures mean your system is aging out.
• Changes in Code: Local plumbing codes evolve. JJL Plumbing stays up-to-date with state, city, and national requirements.
• Aging Equipment: If your device is over 10–15 years old, replacement may be safer (and more cost-effective) than constant repairs.

Quick Safety Checklist

• Inspect visible devices twice a year
• Schedule annual certified Backflow Testing
• Keep records of tests and repairs
• Know where your main shutoff valve is located

Simple steps, big peace of mind.

Signs of Trouble

Some red flags are easy to spot:

• Water tastes or smells odd
• Discolored water from taps
• Visible leaks around prevention devices
• Alarms or notification from local water authorities

If you notice any of these, act fast. Contaminated water is not worth the risk.

DIY vs. Call a Pro

Some home fixes are made for DIY. Backflow prevention isn’t. Even a tiny installation error can render your device useless—or even illegal under code. Certified professionals have the training, testing tools, and paperwork know-how to keep you covered.

If you need peace of mind, our team is always a call away for advice, repair, or installation.

What the Pros Do on Arrival

Expect a thorough process:

• Inspect existing devices and cross-connections
• Verify installation height and orientation
• Pressure test with calibrated gauges
• File required reports with local authorities

It’s not just about fixing pipes—it’s about compliance and health.

Prevention & Maintenance Tips

• Keep landscaping and debris clear of device access points
• Don’t hang hoses or irrigation lines in puddles or drains
• Watch for freezing in cold months—insulate exposed pipes and devices
• Keep pets and children away from device enclosures

Routine care keeps your investment secure.

Costs & Time Factors

Installation costs vary by device type and property layout. Most installations take a few hours. Annual testing is quick—usually under an hour. But skipping maintenance can lead to expensive emergency plumbing visits or code violations.

When It’s an Emergency

If you suspect backflow—like water suddenly turning brown or foul-smelling—shut off your main water supply immediately and call JJL Plumbing. Contamination spreads faster than you think.

FAQ: Backflow Prevention

Is backflow prevention required by law?
Yes, in nearly all municipalities, especially for commercial or multifamily buildings. Check your local code—or let us check for you.

How often should my device be tested?
Most areas require annual testing. Some high-risk locations require twice yearly.

Can I check my own device?
You can look for leaks or corrosion, but certified testing is required for most properties.

What’s the difference between a check valve and an RPZ?
An RPZ offers greater protection, especially against severe hazards. It also has a relief valve for extra safety.

Seasonal Considerations 🍂

• Spring/Summer: Irrigation and hose bibs are in heavy use—ensure vacuum breakers are in place.
• Fall: Schedule annual maintenance before winter.
• Winter: Insulate exposed devices to prevent freezing and bursting.

Common Mistakes to Avoid

• Ignoring testing reminders
• Installing devices incorrectly (wrong height, wrong direction)
• Forgetting to log repairs and inspections
• Using the wrong device for your risk level

Small errors can have big consequences.

Timeline & Disruption

Most installations and tests cause minimal disruption. You’ll have water off for a short time during installation or testing. JJL Plumbing works quickly to minimize downtime for both homes and businesses.

Materials & Equipment

We use only code-approved devices and test kits, in line with American Water Works Association (AWWA) and local standards. Our tools are calibrated for accuracy—because in plumbing, precision matters.

Building Code & Safety Guidelines

JJL Plumbing always follows national standards like the International Plumbing Code (IPC) and local Savannah ordinances. For more information, the EPA’s Cross-Connection Control Manual is a great resource.

For property owners in Savannah, you can learn more about certified plumbing services and how backflow prevention fits into overall water safety.

Backflow can happen fast—but with the right prevention, you’ll never have to worry about what’s coming out of your tap. Clean water. Safe family. Protected business.

Call JJL Plumbing now — or reach us anytime at  855-552-2611 .