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Watts 525

Reverse osmosis system

Watts 525 5-Stage RO Replacement Filters

The Watts 525 RO system features 5 stages of filtration. The sediment and carbon block pre-filters reduce small particulates, chlorine, tastes and odor before the membrane treats for particles fractions of a micron large. The GAC post-filter adds a polishing touch to the water before use.

See the replacement schedule

Compatible parts

Everything that fits the Watts 525

Ready Water RW-SED2510050 5-micron sediment filter, direct replacement for 93023 and PX05-9 7/8
Ready Water
Ready Water RW-SED2510050 Sediment Filter 5 Micron 2.5" x 10"
(89)
$8.99$12.99
Meets FDA requirements for food and beverage contact
Omnipure OMB934-5m 5-micron carbon block filter for standard 10-inch water filter housings
Omnipure
Omnipure OMB934-5m Carbon Block Filter 5 Micron 2.5" x 10"
(83)
$14.99$18.74
Reduces chlorine, taste and odor
NSF Certified performance
USA made compression molded
2.5" Drop-in carbon block element
AXEON TF - 1812 - 50 Reverse Osmosis Membrane 50 GPD 200359 200359 - ESP Water
AXEON
AXEON TF-1812-50 Reverse Osmosis Membrane 50 GPD 200359
(10)
$44.49$53.64
Thin Film Composite (TFC)
Omnipure K2533 inline GAC T33 carbon filter, 2 x 10 inch
Omnipure
Omnipure K2533 GAC T33 Granular Carbon Inline Filter 2" x 10"
(56)
$15.99$19.99
Reduces chlorine, taste and odor
NSF 42 Certified
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Replacement filter info

Your replacement schedule

Each stage of the Watts 525, the exact part that fits it, and when to change it.

  1. Stage 1: Sediment filter

    Part RW-SED2510050, Ready Water RW-SED2510050 Sediment Filter 5 Micron 2.5" x 10" $8.99

    Every 6–12 months

  2. Stages 2 to 3: Carbon block filter × 2

    Part OMB934-5m, Omnipure OMB934-5m Carbon Block Filter 5 Micron 2.5" x 10" $14.99 each

    Every 6–12 months

  3. Stage 4: RO membrane

    Part 200359, AXEON TF-1812-50 Reverse Osmosis Membrane 50 GPD 200359 $44.49

    Every 2 years

  4. Stage 5: Post carbon filter

    Part K2533-KK, Omnipure K2533 GAC T33 Granular Carbon Inline Filter 2" x 10" $16.99

    Every 6–12 months

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