Gas Pressure Test VS Gas Leak Locate

GAS PRESSURE TEST VS. GAS LEAK LOCATE: WHAT’S THE DIFFERENCE AND WHY IT MATTERS!

If you’ve ever had work done on a gas line—or even just smelled gas in or around your home—you may have heard terms like gas pressure test or gas leak locate. While they sound similar, these are two very different procedures with two very different goals.

Understanding the difference can help you stay informed, prepared, and most importantly, safe. At ABC Plumbing, we believe in helping homeowners and businesses understand what’s happening behind the scenes, so let’s break it down.

WHAT IS A GAS PRESSURE TEST?

A gas pressure test is all about ensuring your gas line system is safe, airtight, and ready to operate. This is typically done before turning on a new or repaired gas system. Think of it as a final check before the system is put into use.

The test works by sealing the line and filling it with air or an inert gas—_not natural gas_—to a specified pressure. The pressure is then monitored over a period of time, usually a few hours. If the pressure holds steady, you’re in the clear. But if it drops, there’s a leak somewhere that needs to be addressed.

Key Details:

• Purpose: To verify the gas line can handle the intended operating pressure without leaks.
• Method: The system is pressurized—often to 20 psi for a residential line—and must maintain pressure for a set amount of time (commonly 4 hours with no more than a 2 psi drop).
• When It’s Used: Common after new gas line installations, repairs, or modifications to ensure everything is sealed and secure.
• Preparation: All fittings, joints, and valves should be visible and properly tightened or sealed. Any appliances should be disconnected or isolated during the test.
• Safety: Always use appropriate personal protective equipment and follow local building codes and inspection requirements.

Pro Tip: Never skip a pressure test on a new gas installation. It’s not just about code compliance—it’s about protecting your home and family.

WHAT IS A GAS LEAK LOCATE?

While a pressure test tells you that there’s a leak, a gas leak locate is how you find where it is. This is a diagnostic process used when gas is already flowing through the system, and there’s a suspected leak that needs to be identified and repaired.

Trained professionals use a combination of methods to locate the exact source of a leak, whether it’s a faulty fitting, a crack in the pipe, or a damaged seal.

Common Detection Methods:

• Soapy Water Test: One of the oldest (and still most effective) methods. Technicians apply soapy water to fittings and joints—bubbles form where gas escapes.
• Electronic Gas Detectors: These handheld tools are extremely sensitive and can detect even small amounts of gas in the air.
• Infrared Cameras: These can visualize temperature differences caused by escaping gas, especially in outdoor or underground applications.
• Listening Devices: A faint hissing sound often points to a leak in high-pressure lines.

Key Details:

• Purpose: To locate the precise point of a leak in an active gas system.
• When It’s Used: If you smell gas, notice unusually high gas bills, or fail a pressure test.
• Preparation: Ensure good ventilation in the work area. Turn off open flames or spark-producing devices nearby.
• Safety: If you suspect a leak, evacuate immediately and call a licensed professional—never try to locate a gas leak on your own.

Reminder: Even a small gas leak is a big deal. Don’t ignore it—address it quickly and safely.

COMPARING THE TWO:
GAS PRESSURE TEST VS. GAS LEAK LOCATE

SO, WHICH ONE DO YOU NEED?

If you’re installing a new gas appliance, modifying existing gas lines, or going through an inspection—*you need a gas pressure test*. It ensures everything is airtight and ready to go before gas is introduced into the system.

If you smell gas, hear a hissing sound, or notice your gas bill has spiked unexpectedly, that’s when a gas leak locate is the next step. It’s a diagnostic service used to track down and repair dangerous leaks quickly.

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TRUST THE EXPERTS AT ABC PLUMBING

Gas systems are not something to take lightly. That’s why our certified team at ABC Plumbing is fully trained and equipped to handle both gas pressure testing and leak locating with precision and care. Whether you’re prepping for a city inspection or responding to a leak emergency, we’re here to keep you safe.

📞 Have questions or need to schedule a service?
Contact ABC Plumbing today at 817-427-3222 —your safety is our top priority!