Discount Filter Store Coupons, Discounts and Promo Codes

2 Verified Coupons for

December 20, 2025

Updated December 19, 2025
     4.3 out of 5
CODE
15%
OFF

Coupon Code for 15% Off Uswf Products

expires: ongoing

Used 1 time
100% Success
GET15OFFShow Coupon Code
CODE
30%
OFF

Coupon Code for 30% Off Select Whole House Cartridges

expires: ongoing

Used 1 time
100% Success
WH30Show Coupon Code
CODE
10%
OFF

10% Off Any Order

expires: ongoing

Used 4 timesLast Used 4 minutes ago
100% Success
SAVE10Show Coupon Code
CODE
ON
SALE

Coupon Code for 10% + Free Shipping on Tier1 and Tier1 Plus Fridge Filters

expires: ongoing

Used 5 timesLast Used 4 minutes ago
100% Success
GIFT10SHIPShow Coupon Code
CODE
10%
OFF

Coupon Code for 10% Off Furnace and Air Filters and Free Shipping

expires: ongoing

AIRDEAL10Show Coupon Code
CODE
ON
SALE

Coupon Code for 5% + Free Shipping Sitewide

expires: ongoing

Used 1 time
100% Success
GIFTFIVEShow Coupon Code
CODE
10%
OFF

Coupon Code for 10% Off Top Selling Reverse Osmosis Water Filtration Systems

expires: ongoing

Used 1 time
100% Success
ROCLEAN10Show Coupon Code
CODE
30%
OFF

Coupon Code for 30% Off Tier1 Brand Filters

expires: ongoing

Used 2 timesLast Used 27 days ago
100% Success
HARVEST30Show Coupon Code
CODE
75%
OFF

75% Off Select Items at Swiss Diamond

expires: ongoing

Used 4 timesLast Used 4 days ago
100% Success
HACOOK75Show Coupon Code
CODE
15%
OFF

15% Off

expires: ongoing

Used 1 time
100% Success
BF15Show Coupon Code
CODE
5%
OFF

5% Off on Your Purchase

expires: ongoing

Used 8 timesLast Used about 1 month ago
100% Success
SPRING5 Show Coupon Code
CODE
10%
OFF

10% Off Sitewide

expires: ongoing

Used 5 timesLast Used about 1 month ago
100% Success
HEALTHDAY10Show Coupon Code
CODE
5%
OFF

5% Off + Free Shipping Sitewide

expires: ongoing

Used 6 timesLast Used about 1 month ago
100% Success
WATERDAY5SHIPShow Coupon Code
CODE
15%
OFF

15% Off All Water Filters

expires: ongoing

Used 4 timesLast Used about 1 month ago
100% Success
WATER15Show Coupon Code
CODE
10%
OFF

10% Off and Enjoy Free Shipping

expires: ongoing

Used 5 timesLast Used about 1 month ago
100% Success
EARTHDAY10SHIP Show Coupon Code
CODE
15%
OFF

15% Off on Humidifier Filters + Free Shipping

expires: ongoing

Used 6 timesLast Used 17 days ago
100% Success
HUMID15SHIPShow Coupon Code
CODE
5%
OFF

5% Off + Free Shipping on Your Order

expires: ongoing

Used 6 timesLast Used 17 days ago
100% Success
SAVESHIPShow Coupon Code
CODE
15%
OFF

15% Off All Furnace Filters + Free Shipping

expires: ongoing

Used 6 timesLast Used 17 days ago
100% Success
FURNACE15SHIPShow Coupon Code
CODE
22%
OFF

22% Off With Promo Code

expires: ongoing

Used 6 timesLast Used 17 days ago
100% Success
FALL22Show Coupon Code
CODE
10%
OFF

10% Off on Whole House

expires: ongoing

Used 6 timesLast Used about 1 month ago
100% Success
HOUSEShow Coupon Code
CODE
20%
OFF

20% Off Brita Fridge Filters

expires: ongoing

Used 6 timesLast Used about 1 month ago
100% Success
BRITA20Show Coupon Code
CODE
10%
OFF

10% Off Sitewide

expires: ongoing

Used 6 timesLast Used about 1 month ago
100% Success
BF10 Show Coupon Code
CODE
15%
OFF

15% Off Viqua Uv Systems

expires: ongoing

Used 6 timesLast Used about 1 month ago
100% Success
BF15UV Show Coupon Code
CODE
20%
OFF

20% Off All Furnace Filters + Free Shipping

expires: ongoing

Used 6 timesLast Used about 1 month ago
100% Success
BF20FURNACE Show Coupon Code
CODE
20%
OFF

20% Off + Free Shipping on All Air Filters

expires: ongoing

Used 7 timesLast Used 17 days ago
100% Success
20AIRFALLShow Coupon Code
CODE
50%
OFF

50% Off Tier1 & Tier1 Plus Fridge Filters

expires: ongoing

Used 7 timesLast Used 2 months ago
100% Success
BF50TIERShow Coupon Code
CODE
10%
OFF

10% Off Sitewide

expires: ongoing

Used 6 timesLast Used 2 months ago
100% Success
CM10Show Coupon Code
CODE
20%
OFF

20% Off Berkey Systems

expires: ongoing

Used 6 timesLast Used 21 days ago
100% Success
BF20BERKEY Show Coupon Code
CODE
15%
OFF

15% Off Water Test Kits

expires: ongoing

Used 6 timesLast Used 2 months ago
100% Success
TESTKIT15Show Coupon Code
CODE
15%
OFF

15% Off Berkey Systems + Free Shipping

expires: ongoing

Used 6 timesLast Used 2 months ago
100% Success
BERKEY15SHIP Show Coupon Code
CODE
$30
OFF

$30 Off on All Tier1 Reverse Osmosis System

expires: ongoing

Used 6 timesLast Used about 1 month ago
100% Success
CM30ROShow Coupon Code
CODE
15%
OFF

15% Off Viqua Uv Systems

expires: ongoing

Used 7 timesLast Used 2 months ago
100% Success
CM15UVShow Coupon Code
CODE
20%
OFF

20% Off on Furnace Filters

expires: ongoing

Used 7 timesLast Used 2 months ago
100% Success
CM20FURNACEShow Coupon Code