How to Replace a Dishwasher Drain Hose (Step-by-Step, 2026)
If water backs up into the tub when you run a load of dishes after unplugging the dishwasher and turning on the faucet in the sink connected to the drain line, replace the faulty 3/8” stainless steel hose, typically costing $25 to $35 at Home Depot or Lowe’s. Ensure the new hose has a minimum 90 PSI rating for optimal performance. A clogged pump or filter can mimic these symptoms; always diagnose correctly before replacing parts.
For the full drainage component picture, see Dishwasher Drain Components: Parts Guide (2026).
Quick answer
Replace the drain hose if you observe:
- Visible cracks, splits, or brittle hardened sections on the hose body
- Water leaking from either hose connection point
- A permanent kink that can’t be straightened and stays kinked after repositioning
- A confirmed blockage you can’t clear by flushing (uncommon in a plain corrugated hose, but happens)
Don’t replace the hose for a simple kink. A kinked hose can be repositioned and secured to prevent re-kinking. Replacement is only needed for structural failure. A kink fix takes 5 minutes and costs nothing. See Dishwasher Drain Hose Kinked? How to Fix It (2026) for that procedure.
What this component does and how it fails
The drain hose is a corrugated flexible tube (typically 5/8-inch interior diameter) that runs from the drain pump outlet, under the sink cabinet, and connects to either:
- A garbage disposal’s dishwasher inlet port
- A standpipe (direct drain to household drain line)
- An air gap fitting on the countertop (in states requiring one)
Standard hose length is 6 to 10 feet. Hoses longer than 10 feet create backpressure against the pump and increase the risk of drainage failure. For routing options, see Why Is My Dishwasher Not Draining? Quick Fixes (2026).
How it fails:
- Kinking: Most common failure mode. The hose bends sharply during installation or when someone moves items under the sink. Water flow partially or fully blocks.
- Cracking/hardening: The corrugated plastic becomes brittle over 8 to 12 years and develops small cracks. These cause slow leaks rather than full drainage failure.
- Connection failure: The hose clamp at either end loosens or the fitting cracks. Water drips or sprays at the connection point.
- Blockage: Food debris, grease, or mineral buildup inside the hose. Less common than filter clogs, but possible in hoses with multiple bends.
How to test it (tools + 10 min)
Test 1: Visual inspection (5 min, no tools) Open the cabinet under the sink and find the corrugated drain hose linking your dishwasher to the disposal or standpipe. Carefully follow the hose’s entire length for kinks, tight bends, or visible cracks. Examine both ends where they connect for signs of water damage, look for white mineral deposits, rust, or stains. A kink is usually easy to spot, yet a cracked hose might require running it through a cycle to see if any water leaks out.
Test 2: Flow test (5 min) Disconnect the drain hose from the Whirlpool-brand disposal or standpipe by loosening the hose clamp. Insert the open end of the hose into a bucket. Initiate a drain cycle on your disposal by pressing Cancel/Drain for 3 to 5 seconds. Should water flow freely, it points to an issue with the connection at the disposal or standpipe. A weak or nonexistent flow suggests the problem might be in the hose or pump.
Test 3: Blow test (2 min) First, disconnect the hose at both ends. Next, blow through the hose end-to-end to clear any debris or obstructions. If there’s an unblocked airflow, proceed with a structural condition check; however, if blocked airflow is detected, clear the blockage before considering a replacement.
Step-by-step replacement (30-45 min)
Tools: Phillips screwdriver, pliers or nut driver, hose clamp driver or flathead, towels, bucket, flashlight
Time: 30 to 45 minutes
Step 1: Prep (5 min) First, turn off power at the circuit breaker, then turn off the water supply valve under the sink as a precautionary step, though not strictly necessary for hose replacement. Next, remove the lower dish rack from the dishwasher and place towels underneath the sink cabinet to catch any potential drips.
Step 2: Disconnect the old hose at the sink end (5 min) Check where the drain hose connects, either to the garbage disposal or standpipe. Loosen the clamp by turning counterclockwise with a flathead screwdriver; opt for a nut driver if it’s worm gear, then pull off the hose. You’ll see 1–2 cups of water spill out; grab a bucket.
First, detach the hose from any air gap fitting before disconnecting it from the disposal itself.
Step 3: Disconnect the old hose at the pump end (10 min) Remove the two screws at the bottom front of the dishwasher’s kick panel and open the appliance. The drain hose connected to the pump outlet at the dishwasher’s base should now be visible. Loosen the hose clamp securing this connection, then carefully pull the hose off. Finally, extract the old hose from the cabinet entirely.
Step 4: Route the new hose (5 min) First, feed the new hose through the same path as the old one. Next, ensure that the hose forms a high loop; route it up along the underside of the counter and secure it at the highest point with a cable tie or hose clip, making sure this peak is at least 20 inches above the floor (measure before securing). Once this is done, if an air gap is required by your local code, route the hose through the specified fitting. Finally, connect the hose to the appropriate point once everything is correctly positioned and secured.
Step 5: Connect at the pump end (5 min) First, push the hose onto the pump outlet fitting until it seats fully, typically 1 to 1.5 inches. Next, slide the hose clamp over the connection point and tighten securely. Once that’s done, avoid overtightening spring clamps; they snap at full compression, so stop when the hose is firmly gripped.
Step 6: Connect at the sink end (5 min)
- Push the hose onto the disposal inlet or standpipe fitting until it seats
- Tighten the hose clamp
- For garbage disposal connections: verify the disposal’s dishwasher knockout plug was removed before connecting
Step 7: Test (10 min) First, restore power to the washer, then turn on the water supply. Next, run a short wash cycle using the Quick Wash setting; simultaneously, keep an eye on the drain phase to ensure water exits properly. Once the cycle is underway, check under the sink for any leaks at both connection points during and after the cycle has completed.
See also Dishwasher Drain Pump Replacement: Cost + DIY Guide (2026) if you found the pump failing during this diagnosis. And Dishwasher Check Valve: Testing + Replacement Guide (2026) if water drains but then returns to the tub.
Part numbers and prices by brand
Most dishwasher drain hoses use standard 5/8-inch ID corrugated plastic construction. Universal replacement hoses ($12 to $20 at hardware stores) fit most brands. OEM hoses are more expensive but guaranteed to fit.
| Brand | OEM hose part number | OEM cost | Universal alternative |
|---|---|---|---|
| Whirlpool | W10542302 | $22-$30 | 5/8” corrugated, 6-7 ft |
| Maytag | W10542302 | $22-$30 | Same as Whirlpool |
| Samsung | DD97-00236A | $20-$35 | 5/8” corrugated, 6-7 ft |
| Bosch | 00422010 | $25-$45 | 5/8” corrugated, 6-7 ft |
| GE | WD24X10064 | $20-$35 | 5/8” corrugated, 6-7 ft |
| Frigidaire | 5303280829 | $18-$30 | 5/8” corrugated, 6-7 ft |
| LG | 5214DD2001A | $20-$35 | 5/8” corrugated, 6-7 ft |
For OEM parts, search your model number on AppliancePartsPros or RepairClinic. The model number is on the label inside the door, on the left side.
Don’t skip this.
DIY vs. pro cost comparison
| Approach | Part cost | Labor | Total |
|---|---|---|---|
| DIY (universal hose) | $12-$20 | $0 | $12-$20 |
| DIY (OEM hose) | $18-$45 | $0 | $18-$45 |
| Professional | $18-$45 | $50-$100 | $68-$145 |
The national average for hose replacement done professionally is $50 to $100 in labor, per 2026 Fixr data. Total professional cost is $68 to $145 depending on brand and access difficulty. This is one of the most affordable dishwasher repairs available. For context, a full drain pump replacement runs $150 to $400 professionally. If both the hose and pump are failing, consider replacing both at once to avoid paying a service call fee twice.
Same idea.
For the full connection to the disposal, see Dishwasher to Garbage Disposal Connection: How-To (2026) for routing requirements and knockout plug verification.
Frequently asked questions
How do I know if my dishwasher drain hose needs replacing?
Replace the drain hose if you see visible cracks, brittleness, or hardening in the hose material. If the connection fittings have cracked or separated. Or if the hose leaks at the junction points during the drain cycle. A simple kink doesn’t require replacement: reposition the hose and secure the high loop. Hoses that are still structurally sound but have debris blockages can be cleared by disconnecting and flushing, not replacement.
How long does a dishwasher drain hose last?
A dishwasher drain hose typically lasts 8 to 12 years before showing brittleness or cracking. Hoses that are repeatedly kinked due to poor routing or movement under the sink may fail earlier. The connection clamps often show wear before the hose body does: inspect the clamp points annually for mineral deposits or rust.
Can I use a universal drain hose on any dishwasher?
Yes, usually. Standard dishwasher drain hoses have 5/8-inch interior diameter fittings that fit standard hose clamps and connection points. Universal hoses ($12 to $20 at hardware stores) fit most Whirlpool-family, GE, Samsung, LG, and Frigidaire models. For Bosch and Miele, we recommend OEM hoses because the connection angles and corrugation pitch may differ.
Does the drain hose need a high loop?
Yes. Without a high loop (or an air gap), dirty drain water can siphon back into the dishwasher tub. The high loop routes the drain hose up to the underside of the counter (at least 20 inches above the floor) before routing it down to the connection point. This physical barrier prevents backflow. California and a few other states require an air gap instead of a high loop. Check your local plumbing code.
What size is a standard dishwasher drain hose?
If your dishwasher’s drain hose isn’t performing, start by checking the connection sizes at each end; most have a 0.625-inch interior diameter, though some models might use 1/2-inch or 3/4-inch fittings on one end. Don’t just rely on hardware store stock; measure twice to avoid getting a hose that won’t fit, many universal replacements are 6 to 8 feet long with 5/8-inch connections at both ends.