Product FAQ
Frequently asked questions about products
Air Filters
- My filter is 4" thick and yours is 5". Will it fit?
- How To Install AprilAire 201 or 401 Filter
- How do I choose the correct air filter?
- I don't see my air filter size listed. Do you make custom filters?
- How do I measure my air filter?
- Which way does my air filter go?
Water Filters
- How Often Should I change My Pool / Spa Filter?
- Quick Connect Fittings
- I know my refrigerator model number; what refrigerator filter do I need?
- How do I know which water filter I need?
- What’s the difference between OEM & aftermarket filters?
- How to remove a stuck ULTRAWF or WF3CB filter