Discount Filter Store Promo Codes & Coupons November 2026

Purchase essential water quality testing kits for less than $40. Check for impurities and sediment levels yourself.

Get a discount on pleated air filters for your home or office. Various sizes and MERV ratings are included.

Browse a selection of Merv 13 furnace and air filters below this price point. Stock and sizes are limited.

Get complimentary shipping when your cart total reaches $50 or more. This applies to standard delivery within the US.

Discount applies to a range of replacement filters for hot tubs and spas. Ensure clean water for your relaxation.

Select pool and spa replacement filters are available from this price. Pricing depends on filter type and size.

Purchase two eligible o-rings and receive a third one at no cost. This offer is valid on selected accessory items.

Find tools for easy filter replacement starting at this price. This includes various wrench types for different housings.

Qualified military personnel can receive a discount on their entire order. Verification of service may be required.

Find select replacement fridge filters starting at this low price. Prices vary by model and brand.

Upgrade your home with 15% off whole house water filtration systems.

Discover savings on a variety of filters during our seasonal event. This promotion includes popular water and air filter types.