Direct answer: If mice chewed a washing machine hose, do not run another cycle until you identify whether the damage is on a pressurized fill hose or the drain hose. A pinhole in a fill hose can spray hard and flood fast. A chewed drain hose usually leaks only while the washer is draining.
Most likely: Most often, the damage is a visible chew spot on the washing machine drain hose or on one of the washing machine water supply hoses behind the machine, usually near the floor or where the hose rubs a wall.
Pull the washer out enough to see the hoses, dry everything off, and trace the first damaged spot. Reality check: even a tiny chew mark can open up fully the next time the washer fills or drains. Common wrong move: replacing the wrong hose because the water dripped to the floor in a different place than where it started.
Don’t start with: Do not start with tape, glue, or another test load. Temporary patches on washer hoses fail at the worst time.
The floor behind or under the washer gets wet between loads, or you see a slow drip with the machine idle.
Start here: Start with the hot and cold washing machine water supply hoses and the shutoff valve area.
No leak during fill, then water appears fast near the back of the washer during drain or spin.
Start here: Start with the washing machine drain hose, standpipe, and hose clamp area.
The hose jacket is nicked, scraped, or pitted, but the floor is still dry.
Start here: Treat a damaged fill hose as a replacement item now; treat a damaged drain hose as replace-now if the wall is thinned, split, or soft.
You see droppings, shredded insulation, or debris around the hoses and wall opening.
Start here: Inspect the full hose run carefully before replacing anything, because there may be more than one damaged spot.
This is the highest-risk version because the hose stays under house water pressure whenever the shutoff valves are open.
Quick check: Dry the hose, leave the washer off, and look for fresh beads of water or a damp braided jacket near a bite mark.
This usually leaks only when the pump sends water out, so the floor may stay dry until drain or spin.
Quick check: Look for splits, tooth marks, or a rubbed-through section on the corrugated drain hose near the back panel or standpipe.
Mice can shift a hose enough that a connection starts dripping even if the hose itself is not punctured.
Quick check: Check the fill hose couplings at the shutoff valves and washer, and check the drain hose clamp and standpipe insertion depth.
Where there are droppings and nesting material, you may have a visible chew mark plus a second hidden weak spot lower down.
Quick check: Use a flashlight and inspect the full length of every accessible hose, especially where it touches the wall, floor, or cabinet edge.
You need to know whether the leak is on the pressurized side or only during drainage before you do anything else.
Next move: You narrow the problem down fast and avoid running the washer with a pressurized leak still in play. If you cannot tell where the water started because everything is soaked, dry the hoses and floor completely and move to a controlled test.
What to conclude: A leak with the washer off points to a supply-side problem. A leak only during drain points to the drain hose or standpipe connection.
A chewed fill hose is the most urgent problem because it can burst under pressure even when the washer is not running.
Next move: You confirm a bad washing machine supply hose before buying anything else. If both supply hoses stay dry with the valves briefly opened, the drain hose becomes much more likely.
What to conclude: Visible wetting at a bite mark or hose body means replace that washing machine supply hose, not just the washer at the connection.
Drain hose damage often hides in the corrugations and only shows up when the pump is moving water fast.
Next move: You catch a drain-side leak without guessing and without pressurizing the fill hoses. If the drain hose stays dry but water appears at the standpipe top, the problem may be a backing-up drain rather than rodent damage.
Once the bad hose is confirmed, the clean repair is straightforward. Patches and sealants are not dependable here.
Next move: You fix the actual failure point and reduce the chance of another sudden leak on the next load. If a new hose still leaks, the problem is likely the shutoff valve, washer inlet connection, pump outlet connection, or standpipe drainage.
You want to prove the repair before pushing the washer back, and you do not want fresh hoses left in the same chew zone.
A good result: You know the leak is solved and you lower the odds of the new hose getting chewed next.
If not: If water still appears but neither hose is leaking, stop and inspect the shutoff valves, standpipe, and washer internals before running more loads.
What to conclude: A dry test confirms the hose repair. Continued leaking means the hose damage was only part of the story or not the source at all.
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No. Tape and glue are not reliable on washer hoses. A patched fill hose can burst under pressure, and a patched drain hose can split open during the next pump-out.
If the floor gets wet while the washer is off, suspect a fill hose. If it leaks only during drain or spin, suspect the drain hose or the standpipe connection.
Replace the damaged hose for sure. If both supply hoses are the same age and condition, many homeowners replace both while the water is off so they are not back there again soon.
On a washing machine supply hose, replace it anyway. On a drain hose, replace it if the wall is thinned, split, soft, or deeply gouged. Rodent damage usually gets worse, not better.
Yes. If the drain hose stays dry but water rises and spills at the standpipe during discharge, the drain is backing up rather than the hose leaking.
Not always. Check the full visible hose run and the area behind the washer for more than one damaged section, especially where hoses touch the wall or floor.