Washer Leaking or Not Draining? Internal Drain Hose W10899966 – Fix Sump Leaks Fast
When your top-load washer leaks from the bottom or fails to drain completely, the internal sump hose is the most common culprit — and it’s a cheap fix if caught early. In most Whirlpool, Maytag, and Amana top-load washers, this is caused by a cracked, split, or disconnected internal drain hose (also called the sump hose or tub-to-pump hose). When it fails, water pools under the machine, the drum doesn’t empty fully, and spin cycles leave clothes soaking wet. ⚡ Common failure point in Whirlpool-platform top-load washers built from 2010–2022. Part W10899966 is the genuine OEM replacement that seals the tub-to-pump connection and restores full drainage performance to factory spec.
❓ Is This the Right Part?
This is the correct fix if ALL of the following are true:
- ✔ Your washer powers on and the drum fills with water normally
- ✔ The pump motor runs — you can hear it attempting to drain
- ✔ No error codes pointing to a pump or control board failure
- ✔ ONLY problem is water leaking from the bottom or incomplete draining after cycles
Not sure? Send us your model number — we’ll confirm before you order.
🔧 Common Symptoms
- Water pooling under the washer during or after a cycle
- Clothes still soaking wet after the spin cycle completes
- Washer stops mid-cycle with standing water in the drum
- Visible cracking, splitting, or disconnection on the lower hose near the pump
✔ If these symptoms match, this is the most likely failed component in the system.
✔ In most cases, replacing this internal drain hose restores full drainage and stops leaks immediately.
📦 Part Details
- Part Number: W10899966
- Type: Internal Drain Hose Assembly (Sump Hose / Tub-to-Pump Hose) — OEM Whirlpool
- Replaces: W10215091, W10444123, W10763078, WPW10215091
- Brands: Whirlpool, Maytag, Amana, Crosley, Kenmore
While the cabinet is open and the pump is accessible, inspect the drain pump filter and pump inlet screen for lint, coins, or debris. A partially blocked pump is often what caused the hose to fail under pressure in the first place — clearing it now prevents a repeat failure within months.
⚙️ Installation
Skill Level: Moderate — 30–45 minutes. Unplug the washer and shut off water supply before servicing. Tilt or lay the machine on its side to access the pump and lower hose connections. Release the spring clamps securing the old hose at both the tub outlet and pump inlet, slide the new hose into position, and reseat the clamps firmly. Restore power and run a short drain cycle to confirm no leaks before returning the machine to service.
✓ Compatible Models
Confirmed compatible with WTW4816FW, WTW4850HW, MVWC465HW, NTW4516FW, ITW4871FW plus hundreds of additional Whirlpool, Maytag, Amana, Crosley, and Kenmore top-load washer models. Contact us to verify your model number before ordering.
💡 Pro Tip
Before ordering a replacement hose, check whether the spring clamps at each end have simply slipped off or lost tension — this is especially common after a previous DIY repair. Reseat the clamps and run a cycle. If the leak returns or the hose shows visible cracking, W10899966 is your confirmed OEM fix. Replacing the hose without checking clamp tension is the #1 cause of repeat leaks on this platform.
✓ Model-Specific Repair Pages
✅Compatibility & Cross Reference
Not sure about your model number? Call 1-877-899-7278 and we’ll help you confirm. All brand names are the property of their respective owners and are used for compatibility reference only.
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