Compression fittings are commonly used in plumbing, gas lines, and hydraulic systems to create secure, leak-free connections without soldering. But when it comes time to disconnect or replace a hose, many people wonder:
How do you remove a hose from a compression fitting without damaging the hose or the fitting?
In this step-by-step guide, we’ll walk you through the safe and proper way to remove a hose from a compression fitting—whether it’s plastic, copper, or stainless steel. This tutorial is ideal for DIYers, maintenance professionals, and technicians working with fluid or gas systems.
Preparation and Safety Measures
Before attempting to remove a hose from a compression fitting, it is critical to ensure safety and proper preparation:
- Depressurize the system: Make sure the system is completely free of air or fluid pressure to prevent accidental discharge or injury.
- Inspect the fitting and hose: Check for visible damage, corrosion, or wear. This helps determine whether the hose can be safely removed or needs replacement.
- Gather tools
Tools You’ll Need
Before you begin, gather the following tools:
- Two adjustable wrenches or spanners
- Towel or rag (to catch fluid drips)
- Safety gloves and goggles (for pressurized or hazardous systems)
- Penetrating oil (optional for stuck fittings)
- Replacement ferrule or compression ring (if needed)
Step-by-Step: How to Remove Hose from Compression Fitting
Step 1: Shut Off the System
Before touching any fitting:
- Turn off the water, gas, or hydraulic pressure feeding the line.
- Open the nearest valve or fitting to relieve residual pressure.
- Ensure the system is cool and depressurized.
⚠️ Never remove a hose from a compression fitting while the system is pressurized.
Step 2: Hold the Fitting Body Steady
Use one wrench to grip the body of the compression fitting (the side connected to the pipe or equipment). Hold it firmly to prevent torque stress on the line or threads.
Step 3: Loosen the Compression Nut
With the second wrench:
- Turn the compression nut counterclockwise to loosen it from the fitting body.
- As the nut loosens, you may feel the hose start to wiggle free.
If it’s stuck:
- Apply penetrating oil to the threads and wait 5–10 minutes before trying again.
- Lightly twist the hose while pulling to help break any grip from the ferrule.
Step 4: Gently Remove the Hose
Once the nut is loose:
- Slide it back along the hose.
- Carefully pull the hose away from the fitting body. The compression ring (ferrule) may come off with it, or remain inside the fitting.
💡 If the hose is stuck, rotate it slightly as you pull to release it from the ferrule’s grip.
Step 5: Inspect and Clean the Components
After removal:
- Check the hose and fitting for wear, corrosion, or debris.
- If reusing the fitting, replace the ferrule with a new one for a leak-free reconnection.
- Clean any old PTFE tape, thread sealant, or dirt from the fitting.
Extra Tips for Easy Hose Removal
- Lubricate stubborn threads with penetrating spray (e.g., WD-40).
- For metal compression fittings, avoid using pliers—they can damage the fitting surface.
- In case of damage or wear, replace with a new compression fitting and ferrule to ensure a tight seal.
Safety Considerations
If you’re working with gas (e.g., propane, natural gas) or hazardous fluids:
- Ensure all safety protocols are followed.
- Use certified, gas-rated compression fittings only.
- Always test for leaks after reassembly using a gas leak detector or soapy water.
Summary: Key Takeaways
- Always depressurize the system before removing any fitting.
- Use two wrenches—one to hold the fitting, one to loosen the nut.
- Rotate and pull gently to release the hose from the ferrule.
- Replace the ferrule before reconnecting for a leak-free seal.
FAQ
What if the hose is stuck?
If the hose does not come out easily, avoid using excessive force. Instead:
- Apply a small amount of lubricant around the fitting.
- Use a soft mallet to gently tap the collar or nut.
- For stubborn cases, apply heat carefully (if compatible with the hose material) to expand the fitting slightly
Can You Reuse Compression Fittings?
Generally, you can reuse the fitting body and nut, but the ferrule (compression ring) should always be replaced. Reusing an old ferrule can result in leaks due to deformation from previous compression.
When to Replace Instead of Remove
Sometimes it’s better to cut and replace the hose if:
- The ferrule is stuck permanently.
- The hose is kinked or damaged.
- You’re upgrading to a more secure connection type (e.g., stainless steel threaded fitting or push-to-connect fitting).
What are common issues with compression fittings?
Common problems include leaks at the joint, hose slippage, or damage due to improper installation. These issues can often be resolved by ensuring proper tightening, using compatible materials, and following correct installation procedures
How do you choose the right Compression fitting for your system?
- Check the pipe or tube size.
- Know the pressure and temperature.
- Think about what flows through the system.
- Pick the right grade and fitting type.
- Contact us if you need help.
For professional solutions, contact our engineers.
As a stainless steel pipe fittings manufacturer, we offer tailored, code-compliant solutions for plumbing, propane, and fluid systems. Whether you need custom fittings, compression fittings, or expert guidance—we’re here to help.