Discount Water Filters and Air Filters at Discount Filter

When we protect your filter purchase with our No Worries Guarantee, we mean it!

No Worries...
  • Your filters are guaranteed to be the right fit!
  • Our products are price match guaranteed!
  • Our customer service team is guaranteed to answer your call!
  • You’re guaranteed to find expert help!

Learn more about our No Worries Guarantee
Recommended Low-Cost Alternative
S1-20BB-Pentek Comparable Whole House Water Filter by Tier1
In Stock
1 Filter
Save $5.00
Your Current Selection
S1-20BB Pentek Whole House Filter Replacement Cartridge
In Stock
1 Filter $21.99
  • Product Comparison
  • Instructions
  • Frequently Asked Questions
Recommended Low-Cost Alternative Your Current Selection
Price Per Filter As Low As $16.99 per filter with 1 pack As Low As $21.99 per filter with 1 pack
Model S1-20BB S1-20BB
Filter Life (months) 6 months 6 months
Primary Filter Media Pleated Cellulose Pleated Cellulose
Warranty Guarantee Unconditional Product Guarantee for Life of the Product