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Watts Premier ST6DM (521934)

Reverse osmosis system

Watts Premier ST6DM (521934) 6-Stage RO Replacement Filters

Unike traditional RO systems, this Watts system features two membranes that need replacing every 24 months. Three pre-filters also hang down in standard, 10" filter housings and a GAC post-filter sits on top of the two membranes. See below for the correct replacement filters and parts.

See the replacement schedule

Compatible parts

Everything that fits the Watts Premier ST6DM (521934)

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-1812-25 25 GPD thin-film composite reverse osmosis membrane, part 200357
Pentair
AXEON 200360 TFC-1812-75 Reverse Osmosis Membrane 75 GPD
(9)
$48.99$58.07
Thin Film Composite (TFC)
NSF 58 Certified
Omnipure CL10ROT33-BB 5-micron inline GAC carbon filter with 1/4-inch female threads
Omnipure
Omnipure CL10ROT33 Inline Carbon Filter GAC 5 Mic 2" x 10"
(62)
$12.99$16.24
Reduces chlorine, taste and odor
NSF 42 Certified
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Replacement filter info

Your replacement schedule

Each stage of the Watts Premier ST6DM (521934), 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. Stages 4 to 5: RO membrane × 2

    Part 200360, AXEON 200360 TFC-1812-75 Reverse Osmosis Membrane 75 GPD $48.99 each

    Every 2 years

  4. Stage 6: Post carbon filter

    Part CL10ROT33-BB, Omnipure CL10ROT33 Inline Carbon Filter GAC 5 Mic 2" x 10" $12.99

    Every 6–12 months

Manuals & instructions

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