To store a water filter pitcher when not in use, first remove the filter, then thoroughly clean and dry all parts before placing the pitcher in a cool, dry location with the lid off to allow airflow. This prevents mold, mildew, and bacterial growth that can occur if moisture is trapped.
Clean, dry, and store with lid off to prevent mold.
- Why clean?: Residual moisture and organic matter in the pitcher promote mold and bacteria growth.
- Remove filter?: Yes, the used filter can harbor bacteria and should be discarded or stored separately in a sealed bag in the refrigerator if still in use.
- Lid on or off?: Store with the lid off to allow air circulation and prevent moisture buildup.
1. Remove and Discard or Preserve the Filter
Start by removing the filter from the pitcher. If the filter is still within its recommended lifespan (typically 30–60 days or after filtering 40–80 gallons), you can store it for later use. Place the used filter in a sealed plastic bag and keep it in the refrigerator to slow bacterial growth. However, note that once a filter is wet and used, it can become a breeding ground for microbes if not kept cold. For long-term storage (more than a week), it’s safer to discard the filter and replace it when you resume using the pitcher.
2. Disassemble and Hand Wash All Parts
Take apart the pitcher: remove the lid, reservoir (if separate), and any silicone gaskets. Wash each component by hand using warm water and mild dish soap. Avoid using abrasive scrubbers that can scratch plastic and create hiding spots for bacteria. Pay special attention to the lid gasket and the filter housing area where water can pool. Rinse thoroughly with clean water to remove all soap residue.
3. Sanitize to Kill Germs
After washing, sanitize the pitcher and lid to eliminate any remaining bacteria or mold spores. Use a solution of one teaspoon of unscented bleach per gallon of water, or a mixture of equal parts white vinegar and water. Fill the pitcher with the sanitizing solution, let it sit for 10–15 minutes, then pour it out. Rinse all parts thoroughly with fresh water until no bleach or vinegar smell remains. This step is critical if you plan to store the pitcher for more than a few days.
4. Dry Completely Before Storage
Moisture is the enemy of storage. After sanitizing, dry every part individually with a clean towel. Then leave the disassembled pitcher, lid, and any other parts on a drying rack in a well-ventilated area for at least 24 hours. Ensure that no water droplets remain in crevices or under the lid gasket. For faster drying, you can use a hairdryer on a cool setting to blow air into hard-to-reach areas.
5. Store in a Cool, Dry Place with Lid Off
Once all parts are bone dry, reassemble the pitcher without the filter. Place the pitcher in a cool, dry location away from direct sunlight and heat sources, such as a pantry shelf or a cabinet. Do not store it in the refrigerator unless you plan to use it soon, as the fridge’s humidity can cause condensation. Most importantly, leave the lid off or slightly ajar to allow air circulation. This prevents any trapped moisture from causing mold growth. If you must store it with the lid on, place a dry paper towel inside to absorb any residual moisture.
Pro Tips
- If you have multiple pitchers, store them nested (without lids) to save space, but ensure each is dry first.
- Use a soft-bristled bottle brush to clean the filter cavity where the filter sits.
- Place a silica gel packet inside the pitcher before storing to absorb ambient moisture.
- If storing for more than 3 months, wrap the pitcher in a breathable cloth bag to keep dust off while allowing airflow.
Common Mistakes to Avoid
- Storing the pitcher with a wet filter inside – this guarantees mold within days.
- Putting the pitcher in the dishwasher; high heat can warp plastic and damage the lid seal.
- Sealing the lid tightly shut during storage – trapped moisture leads to mildew.
- Leaving the pitcher in a damp basement or garage – high humidity encourages bacterial growth.
FAQ
Can I store my water filter pitcher in the refrigerator when not in use?
It’s not recommended for long-term storage because the fridge’s humidity can cause condensation inside the pitcher. If you must store it in the fridge, ensure every part is completely dry and leave the lid off. Short-term (a day or two) is fine.
How long can I store a used filter before it goes bad?
A used, wet filter should be stored in a sealed bag in the refrigerator and used within 2–3 days. After that, bacteria can multiply. For longer storage, discard the filter and use a new one when you restart the pitcher.
What if I see mold in my stored pitcher?
Discard any moldy parts immediately. Wash the pitcher with bleach solution (1 teaspoon bleach per gallon of water), rinse well, and dry thoroughly. Replace any silicone gaskets if mold remains in crevices. Then start fresh with a new filter.
The Bottom Line
Proper storage of your water filter pitcher is simple: clean, dry, and keep the lid off. By following these steps, you can prevent mold and bacteria, ensuring your pitcher is ready to use whenever you need it. A little upfront effort saves you from having to buy a new pitcher or deal with unpleasant surprises.
