Water appears as soon as the washer starts filling
You hear the washer call for water and see dripping or spraying behind the machine right away.
Start here: Start with the hot and cold washing machine water supply hoses and the valve connections.
Animal damage on laundry plumbing
Rats Chewed Washing Machine Hose
Direct answer: If rats chewed a washing machine hose, do not run the washer again until you identify whether the damage is on a pressurized water supply hose, the drain hose, or a nearby pipe. A supply hose can burst under pressure fast, while a drain hose usually leaks only during drain or spin.
Most likely: Most often, the damage is on the exposed washing machine drain hose or one of the rubber supply hoses behind the machine where rodents can reach and chew the softer material.
Pull the machine out carefully, dry the area, and trace the first damaged spot before buying anything. Reality check: even a tiny tooth mark on a supply hose is enough reason to replace it. Common wrong move: replacing the washer when the real problem is just one chewed hose behind it.
Don’t start with: Do not start with tape, glue, or a full wash cycle to 'see how bad it is.' That usually turns a small chew mark into a floor leak.
Leak only while fillingSuspect a chewed washing machine water supply hose or shutoff connection first.
Leak only while draining or spinningLook hard at the washing machine drain hose and standpipe area before anything else.
Last reviewed: 2026-04-21
Figure out which hose the rats actually damaged
Water shows up later in the cycle
The floor stays dry during fill, then gets wet during drain or spin.
Start here: Start with the washing machine drain hose, its clamp, and the standpipe opening.
You found chew marks but no leak yet
The hose jacket has tooth marks, flattening, or a shallow gouge, but the floor is dry.
Start here: Treat a chewed supply hose as failed even if it is not leaking yet; inspect the drain hose for depth of damage before deciding.
The hose looks damaged but the wet spot is off to one side
The floor is wet near the wall, valve box, or baseboard and the hose damage may not be the only issue.
Start here: Dry everything and trace the first wet point so you do not miss a chewed nearby pipe or leaking shutoff.
Most likely causes
1. Chewed washing machine water supply hose
This is the most urgent branch when water leaks during fill or when you see tooth marks on a rubber or braided hose behind the washer.
Quick check: With the washer off, open the shutoff valves briefly and watch the supply hoses and hose ends for sweating, dripping, or a fine spray.
2. Chewed washing machine drain hose
This fits when the leak happens only during drain or spin and the hose has visible gouges, splits, or a soft crushed section.
Quick check: Run a short drain or spin while watching the full length of the drain hose and the standpipe entry point.
3. Loose or damaged hose connection after rodent activity
Rats can tug hoses while nesting, and a connection can start leaking even if the hose body is not fully chewed through.
Quick check: Feel around the hose nuts, drain hose clamp, and standpipe area for the first wet point after drying everything.
4. Chewed nearby branch pipe or valve behind the washer
Sometimes the obvious tooth marks are on one hose, but the active leak is actually on a softer plastic line, a valve supply tube, or a pipe penetration nearby.
Quick check: Use a flashlight to inspect the wall side, valve box, and any exposed plastic piping before assuming the washer hose is the only damage.
Step-by-step fix
Step 1: Shut the water off and expose the whole hose run
You need a dry, visible work area before you can tell whether the damage is on a pressurized hose, a drain hose, or nearby plumbing.
- Turn off the washing machine and unplug it before moving it.
- Close both laundry shutoff valves if the washer has hot and cold supply hoses.
- Pull the washer forward slowly so you do not kink or tear a hose that is already damaged.
- Mop up standing water and dry the hoses, valves, wall, and floor so fresh moisture is easy to spot.
- Use a flashlight to inspect the full length of both washing machine supply hoses and the washing machine drain hose.
Next move: You can now see where the chew marks are and whether one hose is obviously split, flattened, or wet. If the area is too tight, the shutoff valves will not close, or moving the machine risks tearing a hose, stop and get a plumber or appliance tech involved.
What to conclude: A clean, dry starting point keeps you from chasing the final drip instead of the actual leak source.
Stop if:
- A shutoff valve will not close fully
- A hose starts spraying when the machine is moved
- The floor or wall is already soft, swollen, or badly water-damaged
Step 2: Separate supply-side damage from drain-side damage
A supply hose leaks under pressure even before a wash cycle gets far, while a drain hose usually leaks only when the pump sends water out.
- Leave the washer pulled out and keep the floor area dry.
- With the washer still off, open the laundry shutoff valves and watch the supply hoses for 1 to 2 minutes.
- Look for drips at the hose body, bulges in the rubber, wet braid, or water forming at the hose ends.
- If the supply hoses stay dry, run a short rinse and drain or spin cycle while watching the drain hose and standpipe area.
- Stop the cycle as soon as you see the first fresh drip or spray.
Next move: You have narrowed it to either a washing machine water supply hose problem or a washing machine drain hose problem. If nothing leaks during this check but the floor keeps getting wet during normal use, inspect the standpipe for overflow and the nearby wall or pipe penetrations for hidden damage.
What to conclude: Timing matters here. Fill leaks point to supply pressure. Drain-time leaks point to the drain hose or standpipe connection.
Step 3: Inspect the damaged spot closely before deciding on the repair
Not every tooth mark means the same fix. A shallow scuff on a drain hose is different from a puncture on a pressurized supply hose.
- For each washing machine supply hose, look for punctures, frayed braid, bulges, soft spots, or rust staining at the crimped ends.
- For the washing machine drain hose, look for a slit, pinhole, crushed section, or a worn spot where the hose rubs the cabinet or wall.
- Check the drain hose clamp and the washer outlet connection for looseness or cracking.
- Inspect the laundry shutoff valves and any exposed plastic or rubber lines behind the washer for chew marks too.
- Mark the exact damaged area with tape so you do not lose it when repositioning the hose.
Next move: You should know whether the hose body itself is damaged, the connection is leaking, or the real problem is a nearby valve or pipe. If the damage disappears into the wall, the valve box, or a finished surface, stop here and open the wall only after you are ready for a plumbing repair.
Step 4: Replace the failed hose, not just the damaged section
Patch repairs on washer hoses do not hold up well, especially on pressurized supply lines. Replacing the full hose is the dependable fix.
- If a washing machine water supply hose has any puncture, frayed braid, or bulge, replace that entire supply hose before using the washer again.
- If the washing machine drain hose is split, punctured through, badly crushed, or leaking at a hardened end, replace the entire drain hose.
- If the drain hose only slipped loose at the washer outlet and the hose itself is sound, reseat it fully and tighten or replace the washing machine drain hose clamp as needed.
- Do not reuse a supply hose with visible tooth damage even if it passed a quick test.
- After replacement, route the hoses so they do not rub sharp edges or get pinched when the washer is pushed back.
Next move: The damaged hose is out of service and you have a real repair instead of a temporary patch. If the leak remains after replacing the confirmed bad hose, the problem is likely at the shutoff valve, standpipe, washer pump outlet, or nearby plumbing and needs a closer diagnosis.
Step 5: Test carefully, then deal with the rodent entry problem
A good repair still fails if the new hose leaks at the connection or the rats keep getting behind the washer.
- Open the shutoff valves slowly and watch the supply hose connections for several minutes.
- Run a short fill and drain cycle with the washer still pulled out so you can see the full hose path.
- Check the floor, wall, and standpipe area again after the cycle ends.
- Push the washer back slowly, leaving enough slack so the hoses are not kinked or crushed.
- Seal obvious gaps around pipe penetrations with an appropriate rodent-resistant repair method and clean up nesting material safely before regular use resumes.
A good result: No fresh water appears during fill, drain, or after the cycle, and the hoses stay clear of pinch points.
If not: If you still get water behind the washer, stop using it and inspect the shutoff valves, standpipe, and nearby branch piping for a second leak source.
What to conclude: Once the hose repair holds under a full test, the next job is keeping rodents from coming back and chewing the new line.
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FAQ
Can I still use the washer if rats only nicked the hose a little?
If it is a washing machine water supply hose, no. Even a small tooth mark can turn into a burst under pressure. If it is the drain hose, a shallow surface scuff may not leak yet, but any puncture, split, or crushed section means replacement is the safer call.
Is it okay to wrap the chewed spot with tape for now?
Not on a supply hose. Tape is not a dependable pressure repair. On a drain hose, tape might slow a drip briefly, but it is still a temporary measure and not something to trust for regular use.
How do I tell whether the leak is from the supply hose or the drain hose?
Watch when the water appears. If it leaks as the washer fills, suspect a washing machine supply hose or its connection. If it stays dry until drain or spin, suspect the washing machine drain hose, its clamp, or the standpipe area.
Should I replace both washing machine supply hoses if only one was chewed?
If the other hose is old, stiff, rust-stained at the ends, or shows any wear, replacing both is smart while the machine is already pulled out. If the other hose is clearly newer and in good shape, replacing only the damaged one is reasonable.
What if I replaced the hose and the floor still gets wet?
Then the hose was not the only problem. Check the laundry shutoff valves, the standpipe for overflow, the washer drain outlet connection, and any nearby exposed pipe or plastic line behind the machine. Keep the washer out and test again until you find the first wet point.
Can rats chew braided stainless washing machine hoses too?
They usually go after softer rubber and plastic first, but braided hoses can still fail if the inner liner is damaged, the braid is frayed, or the hose ends are compromised. If you see tooth damage or moisture on a braided hose, replace it.