Discount Water Filters and Air Filters at Discount Filter Store.com

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

Water Filtration Systems & Filters

Discount Filter Store carries a wide variety of water filters and filtration systems to make sure that you have clean water everywhere you need it. We offer camping water filters, RV filters, water bottles for travelers on the go. Purify your office or home’s drinking water with countertop filter systems, commercial grade filters, and whole house filter systems. Our filters are protected by our 100% Price Match Guarantee. We are happy to offer you the lowest possible price on our filters, matching any lower price listed by competitors.

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Items 49 to 96 of 683 total

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  • PENTEK_CW_MF_FILTER

    PENTEK_CW_MF_FILTER

    $6.99 MSRP: $10.34
    Save 32%
  • PENTEK_DGD_2501_20_FILTER

    PENTEK_DGD_2501_20_FILTER

    $23.99 MSRP: $26.84
    Save 11%
  • PENTEK_DGD_2501_FILTER

    PENTEK_DGD_2501_FILTER

    $14.99 MSRP: $18.34
    Save 18%
  • PENTEK_DGD_5005_20_FILTER

    PENTEK_DGD_5005_20_FILTER

    $23.99 MSRP: $25.76
    Save 7%
  • PENTEK_DGD_5005_FILTER

    PENTEK_DGD_5005_FILTER

    $15.95
  • PENTEK_DGD_7525_20_FILTER

    PENTEK_DGD_7525_20_FILTER

    $27.99
  • PENTEK_DGD_7525_FILTER

    PENTEK_DGD_7525_FILTER

    $14.99 MSRP: $16.55
    Save 9%
  • PENTEK_ECP1_10_FILTER

    PENTEK_ECP1_10_FILTER

    $11.99 MSRP: $17.99
    Save 33%
  • PENTEK_ECP1_20BB_FILTER

    PENTEK_ECP1_20BB_FILTER

    $26.99 MSRP: $33.99
    Save 21%
  • PENTEK_ECP1_BB_FILTER

    PENTEK_ECP1_BB_FILTER

    $15.99 MSRP: $17.12
    Save 7%
  • PENTEK_ECP20_20_FILTER

    PENTEK_ECP20_20_FILTER

    $15.99 MSRP: $21.99
    Save 27%
  • PENTEK_ECP20_20BB_FILTER

    PENTEK_ECP20_20BB_FILTER

    $24.99 MSRP: $28.39
    Save 12%
  • PENTEK_ECP20_BB_FILTER

    PENTEK_ECP20_BB_FILTER

    $15.99 MSRP: $17.70
    Save 10%
  • PENTEK_ECP5_20BB_FILTER

    PENTEK_ECP5_20BB_FILTER

    $24.99 MSRP: $29.31
    Save 15%
  • PENTEK_ECP5_BB_FILTER

    PENTEK_ECP5_BB_FILTER

    $13.99 MSRP: $29.13
    Save 52%
  • PENTEK_ECP50_20BB_FILTER

    PENTEK_ECP50_20BB_FILTER

    $24.99 MSRP: $31.99
    Save 22%
  • PENTEK_ECP50_BB_FILTER

    PENTEK_ECP50_BB_FILTER

    $21.99 MSRP: $25.34
    Save 13%
  • PENTEK_EP_10_FILTER

    PENTEK_EP_10_FILTER

    $11.99 MSRP: $15.34
    Save 22%
  • PENTEK_EP_20_FILTER

    PENTEK_EP_20_FILTER

    $17.99 MSRP: $20.00
    Save 10%
  • PENTEK_EP_20BB_FILTER

    PENTEK_EP_20BB_FILTER

    $69.77
  • PENTEK_EP_BB_FILTER

    PENTEK_EP_BB_FILTER

    $27.99 MSRP: $32.32
    Save 13%
  • PENTEK_EPM_20_FILTER

    PENTEK_EPM_20_FILTER

    $15.99 MSRP: $19.34
    Save 17%
  • PENTEK_EPM_20BB_FILTER

    PENTEK_EPM_20BB_FILTER

    $47.99 MSRP: $59.99
    Save 20%
  • PENTEK_EPM_BB_FILTER

    PENTEK_EPM_BB_FILTER

    $26.99 MSRP: $34.49
    Save 22%
  • PENTEK_GAC20_BB_FILTER

    PENTEK_GAC20_BB_FILTER

    $69.99
  • PENTEK_NCP_20_FILTER

    PENTEK_NCP_20_FILTER

    $14.99 MSRP: $20.57
    Save 27%
  • PENTEK_NCP_20BB_FILTER

    PENTEK_NCP_20BB_FILTER

    $34.99 MSRP: $48.81
    Save 28%
  • PENTEK_NCP_BB_FILTER

    PENTEK_NCP_BB_FILTER

    $32.99 MSRP: $36.34
    Save 9%
  • PENTEK_P1_20_FILTER

    PENTEK_P1_20_FILTER

    $11.99 MSRP: $15.34
    Save 22%
  • TIER1_C5_20_FILTER
  • TIER1_EP10_10_FILTER

    TIER1_EP10_10_FILTER

    $7.99 MSRP: $10.34
    Save 23%
  • TIER1_EP5_10_FILTER

    TIER1_EP5_10_FILTER

    $8.49 MSRP: $11.49
    Save 26%
  • TIER1_EPM10_934_FILTER

    TIER1_EPM10_934_FILTER

    $17.99 MSRP: $30.99
    Save 42%
  • TIER1_P1_10_FILTER

    TIER1_P1_10_FILTER

    $3.99 MSRP: $7.99
    Save 50%
  • TIER1_P1_10BB_FILTER

    TIER1_P1_10BB_FILTER

    $8.99 MSRP: $16.99
    Save 47%
  • TIER1_P5_10_FILTER

    TIER1_P5_10_FILTER

    $3.99 MSRP: $10.34
    Save 61%
  • TIER1_P5_10BB_FILTER

    TIER1_P5_10BB_FILTER

    $11.99 MSRP: $24.64
    Save 51%
  • TIER1_P5_20_FILTER

    TIER1_P5_20_FILTER

    $4.99 MSRP: $9.19
    Save 46%
  • TIER1_P5_20BB_FILTER

    TIER1_P5_20BB_FILTER

    $20.99 MSRP: $25.76
    Save 19%
  • TIER1_R30_934_FILTER

    TIER1_R30_934_FILTER

    $15.99 MSRP: $17.99
    Save 11%
  • PENTEK_P1_FILTER

    PENTEK_P1_FILTER

    $6.99
  • Pentek R30-20 Replacement Water Filter Cartridge

    R30-20 Pentek Replacement Filter Cartridge

    $17.99 MSRP: $24.99
    Save 28%
  • PENTEK_S1_FILTER

    PENTEK_S1_FILTER

    $7.99 MSRP: $11.34
    Save 30%
  • PENTEK_WP25BB97P_FILTER

    PENTEK_WP25BB97P_FILTER

    $21.99
  • PENTEK_WP5BB97P_FILTER

    PENTEK_WP5BB97P_FILTER

    $20.99
  • PENTEK_WPX25BB97P_FILTER

    PENTEK_WPX25BB97P_FILTER

    $22.99
  • PENTEK_WS_10_FILTER

    PENTEK_WS_10_FILTER

    $19.99 MSRP: $24.83
    Save 19%
  • PX05-9-78 Purtrex Replacement Water Filter

    PX05-9-78 Purtrex Replacement Water Filter

    $5.99 MSRP: $9.99
    Save 40%

Items 49 to 96 of 683 total

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