Bissell Clean Tank Cap Replacement Part 1638661
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Description
BISSELL Clean Tank Cap — OEM Replacement Part #1638661
A small part with a big job — the genuine OEM BISSELL Clean Tank Cap #1638661 seals the fill opening of the clean water tank on select BISSELL Little Green® Cordless, Little Green® Cordless SmartMix®, Little Green® ProHeat® SmartMix®, and Little Green® ProHeat® Pet portable carpet cleaners. Without a properly sealing cap, clean water leaks out during use and transport — making a mess, wasting solution, and reducing your machine’s cleaning effectiveness. If your cap is cracked, missing, or no longer sealing tightly, this direct-fit OEM replacement restores a secure, leak-free seal instantly.
Signs Your Clean Tank Cap Needs Replacing
- Clean water leaking from the top of the tank during use or transport
- Cap feels loose, wobbly, or doesn’t click/thread into place securely
- Visible cracks or damage to the cap body or seal
- Cap is missing entirely
Why Choose This OEM Clean Tank Cap?
- Seals the clean water tank fill opening to prevent leaks during use and transport
- Replaces cracked, missing, or poorly sealing caps quickly and affordably
- Restores proper tank closure for mess-free, reliable cleaning operation
- Genuine BISSELL OEM part — guaranteed to fit and seal correctly on compatible models
- Easy DIY replacement — no special tools required
Installation
Simply thread or press the new cap onto the clean tank fill opening until it seats securely. If the cap uses a gasket or o-ring, ensure it is properly seated before closing. No tools needed. Consult your model’s user manual for the exact cap style (threaded vs. press-fit) on your machine.
Compatible Models
This clean tank cap is compatible with the following BISSELL Little Green® portable carpet cleaner models:
- Little Green® Cordless Portable Carpet Cleaner — Model 3682 (similar: 3734)
- Little Green® Cordless SmartMix® Portable Carpet Cleaner — Model 3682L
- Little Green® ProHeat® SmartMix® Portable Deep Cleaner — Model 3935
- Little Green® ProHeat® Pet Portable Carpet Cleaner — Model 3969 (similar: 3919P, 3935, 3973, 39198)
Always verify your model number before ordering. Check the label on the bottom of your machine.
Product Details
- Part Number: 1638661
- Brand: BISSELL
- Component: Clean Tank Cap
- Fits: BISSELL Little Green Cordless 3682, 3682L, 3734; ProHeat SmartMix 3935; ProHeat Pet 3919P, 3935, 3969, 3973, 39198
- Condition: New, Genuine OEM Replacement Part
