The basic connection: what you need and how it works
A dryer hose connects your dryer's outlet to the vent that leads outside. The hose slides onto a fitting at the back of the dryer, then runs to either a wall vent or a duct that goes through your attic or crawlspace. The connection at the dryer end uses a clamp to hold the hose tight so air and lint cannot escape into your laundry room.
Most dryers have a 4-inch outlet (measured inside the opening). Your hose should match that size. The vent opening on the outside of your house is usually 4 inches as well, though some older homes have 3-inch vents. Before you buy a hose, measure both ends to confirm the diameter.
Key Takeaways
- Dryer hose slides onto the outlet fitting at the back of the dryer and is secured with a hose clamp tightened by hand or screwdriver.
- The other end of the hose connects to a wall vent, roof vent, or duct opening, and should be as short and straight as possible to reduce lint buildup.
- Use a clamp at both ends of the hose — one at the dryer and one at the vent — to prevent the hose from slipping off during operation.
- Rigid metal duct is more durable and safer than flexible foil hose, which can kink, trap lint, and become a fire hazard over time.
- After connecting, check that the hose has no kinks, sags, or sharp bends, and that lint is not leaking where the hose meets the dryer or vent.
Gathering the right materials and tools
You will need a dryer hose (either flexible foil or rigid metal), two hose clamps (stainless steel or galvanized, sized to fit your hose diameter), and a screwdriver or nut driver to tighten the clamps. If you are replacing an old hose, you may already have clamps you can reuse, though new ones are inexpensive and less likely to slip.
Flexible foil hose is cheaper and easier to route around corners, but it traps lint inside the ridges and can kink or tear. Rigid metal duct (also called hard duct) is the safer choice — it resists kinking, sheds lint more easily, and lasts longer. Many building codes now require rigid duct for new installations or replacements. If your dryer is close to the vent opening, rigid duct is worth the extra cost.
Have a flashlight and a rag or old towel handy. You may need to reach behind the dryer, and lint often clings to the fitting.
Disconnecting the old hose (if you are replacing one)
Unplug the dryer from the electrical outlet or turn off the breaker. This is not optional — even though you are only handling the hose, it is the safest practice.
Locate the clamp holding the hose to the dryer outlet. It is usually on the back of the dryer, low and to one side. Loosen the clamp screw with a screwdriver until the clamp is loose enough to slide off. Pull the hose straight out of the fitting. Lint will likely come with it — wipe the fitting clean with a rag.
If the hose is also clamped at the vent end (which it should be), loosen that clamp as well and pull the hose free. Inspect the vent opening for lint buildup and clean it out if needed.
Attaching the new hose at the dryer
With the dryer still unplugged, slide the end of the new hose onto the outlet fitting at the back of the dryer. Push it on firmly — it should go on smoothly without forcing. The hose should cover the fitting completely, with no gap between the hose and the dryer body.
Slide a hose clamp over the hose, positioning it so the clamp screw is on top or to the side (not on the bottom, where it can catch lint or be hard to reach). Tighten the clamp screw with a screwdriver until the clamp is snug. You should not be able to twist the hose by hand, but do not over-tighten — you can crack the fitting or crush the hose.
A good test: try to pull the hose straight out. It should not budge. If it slides, the clamp is too loose.
Running the hose to the vent
The path from the dryer to the vent should be as short and straight as possible. Every bend, sag, or extra length traps lint and reduces airflow. If the vent is on the same wall as the dryer, run the hose directly to it. If the vent is farther away, use the shortest route available.
Avoid running the hose through walls, attics, or crawlspaces unless you have no other choice. If you must run it through an attic, support it every 3 to 4 feet with a strap or clamp so it does not sag. Sagging hose collects lint and can restrict airflow enough to cause the dryer to overheat.
Never run the hose through a wall cavity without a proper duct chase (a framed opening designed for ducts). Lint can accumulate inside the wall and become a fire hazard. If your dryer is far from the vent, consider having a professional install a rigid duct system or relocate the vent closer to the dryer.
Securing the hose at the vent end
Slide the end of the hose onto the vent fitting. This could be a wall vent, roof vent, or duct opening, depending on your setup. Push the hose on firmly until it covers the fitting completely. There should be no gap or loose connection.
Slide a second hose clamp over the hose and position it near the vent opening. Tighten the clamp screw until the hose is snug and cannot be pulled off. Again, snug is the goal — not so tight that you crush the hose.
If the vent has a damper (a flap that opens when the dryer runs and closes when it stops), make sure the hose connection does not prevent the damper from opening fully. A stuck damper will trap lint and reduce airflow.
Checking for leaks and kinks
Before you plug the dryer back in, inspect the entire hose run. Look for kinks, sharp bends, sags, or crushed sections. The hose should be relatively straight and supported so it does not hang or twist. If you see a kink, try to straighten it gently. If the hose is damaged, replace it — a damaged hose can leak lint or restrict airflow.
Check both clamp connections. Try to wiggle the hose at each end. It should not move. If either end is loose, tighten the clamp screw a bit more.
Plug the dryer back in and run it on a short cycle (10 to 15 minutes). Step outside and hold your hand near the vent opening. You should feel warm air and lint coming out. If you feel little or no airflow, the hose may be kinked, clogged, or not fully connected. Turn off the dryer and check the connections and the hose path.
Frequently Asked Questions
Can I use duct tape instead of a hose clamp?
No. Duct tape degrades over time, especially in the heat near a dryer vent, and will not hold the hose securely. A hose clamp is inexpensive and will last for years. Use a clamp every time.
What if the hose does not fit the vent opening?
Measure the vent opening and the hose diameter. If they do not match, you need a different hose size or an adapter. Some vents have a 3-inch opening while most dryers have 4-inch outlets — a 4-to-3-inch reducer is available at hardware stores. Do not force a hose that does not fit.
How often should I replace the dryer hose?
Inspect the hose every six months. If you see cracks, tears, kinks that will not straighten, or heavy lint buildup inside the hose, replace it. Most hoses last three to five years with regular use. Rigid metal duct lasts longer than flexible foil.
Is it okay to leave the hose disconnected when the dryer is not in use?
No. A disconnected hose allows lint and moisture to escape into your laundry room, and it creates a fire hazard. Keep the hose connected and clamped at all times. If you need to move the dryer, reconnect the hose before using it again.
What should I do if lint is leaking where the hose connects to the dryer?
The clamp is too loose. Tighten the clamp screw until the hose is snug and the leak stops. If tightening does not work, the hose may be torn or the fitting may be damaged. Inspect both, and replace the hose or have a professional check the dryer outlet.