Why is my propane tank hissing when I turn it on?

Author: Edgar Larson  |  Last update: Monday, August 18, 2025

The Pressure Relief Valve Is Open The pressure relief valve is a safety feature that prevents tanks from rupturing. A propane tank may make a hissing sound when this valve is opened. There is no cause for concern in this case, and the valve will close again after the pressure is relieved.

How do you fix a hissing propane tank?

If the pressure-relief valve is open, do not try to close it. It will close automatically when the pressure returns to a safe level. You can help cool your tank by spraying it with cool water from a hose. If the hissing continues, or it's not a particularly hot or sunny day, you may have a leak .

Is it normal to hear hissing from a propane tank when turned on?

It's normal to hear a hiss when you first open the cylinder. It's filling up the hose with gas. It should stop hissing within a second or two. If it's continuing then the gas is going somewhere, you just got to find where. Use soapy water to find out.

Why is my propane tank hissing when I open the valve?

It's normal to hear a hiss when you first open the cylinder. It's filling up the hose with gas. It should stop hissing within a second or two. If it's continuing then the gas is going somewhere, you just got to find where. Use soapy water to find out.

Why does my propane tank make a sound when I turn it on?

A gurgling or humming noise after you have turned your gas on could mean that your propane tank has been overfilled. An overfilled tank puts excess pressure on the regulator and reduces the outflow from the tank. This could result in weak flames, low heat and discoloured pilot lights.

Why Is My PROPANE TANK Making A HISSING Sound? | Propane CYLINDER Making NOISE😮

Why is my gas cylinder making hissing noise?

If you hear any sounds around the valve, the first thing you should do is close your gas cylinder's regulator tap. The regulator should then be removed from the cylinder valve and placed away from the gas cylinder. If the hissing sound stops after removing the regulator, it means that the leak is from the regulator.

Why does my propane tank smell when I turn it on?

If you smell a bad odor or hissing sound coming from your propane tank, chances are it's a leak. This will be your cue to spring into action. Check for the leak and reduce the risk of a big explosion or fire. Alert the fire department and evacuate the area.

Why is my tank making a hissing noise?

If you have too much sediment buildup, you'll hear a hissing noise when the trapped water overheats, turns to steam, and pushes upward to escape from the sediment forcefully. Eventually, this buildup can cause tears and leaks in your tank if you don't address it (which we'll explain later).

How do I know if my propane valve is bad?

One of the most noticeable signs of a bad propane regulator is low gas pressure. If you notice that your propane-powered appliances are not performing as they should, such as a weak flame on a gas stove or a slow heat output from a gas furnace, it could be an indication that the regulator is not working correctly.

Why does my gas hiss when I open it?

Pressure release valve: One of the most common culprits for a hissing noise is the pressure relief valve. This valve is an essential safety feature designed to release gas if the pressure inside the tank exceeds safe levels.

Why is my pressure tank hissing?

Its most probable cause is waterlogging in the water pressure tank. You'll usually notice this noise near the water pressure tank when the pump is switched on.

How do I know if my propane tank is leaking?

A good way to test this is to mix dish detergent and water. Spray it around your tank and hoses. If you notice water bubbling around the area where your propane tank is located, you've likely got a propane gas leak.

Where is the pressure relief valve on a propane tank?

Look at the shutoff valve on the base of the propane tank. Near it is the round, capped safety relief valve. This piece works independently to protect your tank from having a dangerous pressure buildup inside it.

Should a propane tank hiss when turned on?

Signs your propane grill tank has a problem

Here are some key indicators that something may be wrong: The most obvious sign is the hissing sound itself. This noise is a clear indication that gas is escaping from the tank.

Is a leaking propane tank an emergency?

Call 911 and then your propane supply company as soon as you and your family are a safe distance away from the home. Your propane supplier and local fire department are able to respond to propane leaks 24/7.

Is it OK to leave valve open on propane tank?

This valve prevents the propane from leaking, thus eliminating a fire or explosion should the propane encounter a source of ignition. Be safe, take a couple of seconds to close the valve after use. After doing this a few times it becomes a habit, good habit, and a safe one.

How to burp a propane tank?

On your propane tank, twist the propane tank shutoff valve clockwise until it is totally closed. Next, take the propane tank hose off in the same way you do when you change out the tank. You'll probably hear a slight hiss escape as the excess pressure is released. Like a baby, your propane tank just burped.

Why won't my 20 lb propane tank release gas?

Check that the hose attachment is properly connected to the propane tank, and double-check that the screw-on valve is tightened. Some propane tanks have safety features that won't allow gas to escape from the canister unless the hose connection is tightly secured with the gas release mechanism.

How do you stop a propane tank from hissing?

What to do if your propane grill tank hisses
  1. Immediately shut off the grill and the tank valve to stop the flow of gas.
  2. If it's safe to do so, check the connections between the tank, regulator, and grill to ensure they're secure.
  3. Try to find the leak.

Why is my gas cylinder making a hissing sound?

The Pressure Relief Valve Is Open

The pressure relief valve is a safety feature that prevents tanks from rupturing. A propane tank may make a hissing sound when this valve is opened. There is no cause for concern in this case, and the valve will close again after the pressure is relieved.

How do I stop hissing noise?

When recording, you can eliminate the noise by removing noise sources such as a fan or a computer. You can also reduce the hissing sound by placing the microphone closer to the subject. Another way to eliminate hissing noise is to turn off the auto-gain settings in the camera.

Can you smell propane when the tank is low?

Letting your propane tank gauge fall below 20% can not only be uncomfortable for you and your family, but it can also be a safety hazard. As your propane level gets low, it is designed to emit a small propane smell. The smell can be equated to the smell of rotten eggs.

Previous article
Can you use oven cleaner on gas grill grates?
Next article
What is the best seal for a toilet flange?