A complete 5-stage replacement set — sediment, GAC & carbon-block pre-filters, your choice of 50/75/100 GPD RO membrane, and a US-made Omnipure post-carbon — that fits most standard under-sink reverse osmosis systems.
Membrane
50 / 75 / 100 GPD
A full refresh for your under-sink RO system
This is the complete filter set for a standard 5-stage under-sink reverse osmosis system — everything that wears out, in one box. It carries three 10″ × 2.5″ pre-filters (spun sediment, granular activated carbon, and a carbon block), your choice of RO membrane in 50, 75, or 100 GPD, and a final US-made Omnipure inline post-carbon to polish taste right before the faucet.
The post-filter is threaded, so we include both ¼″ and ⅜″ quick-connect elbow adapters in every box — it connects to standard ¼″ or ⅜″ tubing with no extra parts to buy. Choose your membrane GPD from the options above and you’re set for a complete rebuild.
What’s inside — the 5 stages
Stage 1 · Sediment
Spun polypropylene, 5 micron
Traps dirt, sand, silt, rust and scale particles so they don’t clog the carbon or membrane downstream.
Stage 2 · GAC Carbon
Granular activated carbon
Helps reduce chlorine and organic compounds that affect taste and odor — and protects the membrane from chlorine.
Stage 3 · Carbon Block
CTO carbon block, 10 micron
A finer carbon-block polish that further helps reduce chlorine, taste and odor before water reaches the membrane.
Stage 4 · RO Membrane
TFC membrane — 50 / 75 / 100 GPD
The reverse-osmosis stage. Helps reduce total dissolved solids (TDS), fluoride, heavy metals, nitrates and more. Membrane made in USA.
Stage 5 · Post-Carbon
US-made Omnipure inline carbon
A final polishing stage after the tank that refines taste and odor at the faucet. Ships with both ¼″ and ⅜″ adapters.
Choosing your membrane (50 / 75 / 100 GPD)
Pick the membrane rating that matches your system and daily demand. All three share the same standard 1812 size and drop into the same housing — the difference is how fast they produce water.
50 GPD
The economical, most common choice — a like-for-like fit for standard tank systems built around a 50 GPD membrane.
75 GPD
A faster fill for households that draw more water through the day, with the same fit.
100 GPD
The highest output in this set — the quickest recovery for high-use setups. A direct drop-in upgrade in the same housing.
What this set helps reduce
- ✓Sediment — dirt, sand, silt, rust, scale particles
- ✓Chlorine, taste and odor
- ✓Total Dissolved Solids (TDS)
- ✓Fluoride
- ✓Heavy metals (lead, arsenic, mercury, chromium)
- ✓Nitrates and nitrites
- ✓Dissolved salts and many inorganic compounds
Actual performance depends on your feed-water quality, pressure, temperature, and proper pre-filtration. Not all contaminants are present in every water source.
Which systems does it fit?
This is a universal-fit set built to standard dimensions. It fits most standard 4- and 5-stage under-sink RO systems that use 10″ × 2.5″ (9.75″ × 2.5″) screw-in cartridges and a standard 1812 membrane, including these popular models:
APEC — ROES-50, RO-45, ROES-PH75, ROES-UV75, RO-90, RO-PERM, RO-Hi, WFS-1000
iSpring — RCC7, RCC7P, RCC7AK, RCC7P-AK, RCC1UP, RCC1UP-AK, RCC7AK-UV, RCW5
Watts / Watts Premier — WP-5, WP5-50, RO-Pure, RO-TFM-5SV
Express Water — RO5DX, RO10DX, ROALK10D (standard-housing models)
GE — GXRM10RBL
Also fits — Geekpure, Global Water, Oceanic, LiquaGen, Bluonics, Puromax, Flowmatic, PuROLine, Crystal Quest, and other standard open-housing RO systems.
How to confirm it fits your system
- Your pre-filter housings open with a wrench and take standard 10″ × 2.5″ cartridges.
- Your membrane housing takes a standard 1812 membrane.
- Your tubing is ¼″ or ⅜″ — both adapters are included.
This set does not fit
Proprietary “quick-change” / twist-in cartridge systems and tankless all-in-one units that use sealed, brand-specific filters instead of standard screw-in housings — for example Waterdrop G-series (tankless), Frizzlife PD-series (tankless), Home Master (modular all-in-one housings), Brondell Circle, and Culligan Aqua-Cleer quick-change units. If your filters twist out as one sealed piece, this set is not the right match. When in doubt, count your housings or send us a photo and we’ll confirm before you buy.
Compatible replacement set: these are high-quality MyWaterClub compatible filters, not original manufacturer (OEM) parts. Any brand names above are shown only to indicate the types of systems these standard-size filters fit, and do not imply affiliation with or endorsement by those manufacturers.
Replacement schedule
- Change the sediment, GAC, carbon-block and post-carbon filters roughly every 6–12 months (sooner on heavy sediment or high use).
- Change the RO membrane roughly every 2–3 years, or sooner if production slows or TDS reduction drops off.
- Between full sets, an annual pre-filter set (no membrane) keeps the system fresh at lower cost — see the cross-link below.
- After installing, run and discard the first tank of water, then let the system settle a few days before relying on your TDS reading.
Specifications
| Set type |
5-stage under-sink RO replacement set |
| Stage 1 |
Spun polypropylene sediment, 5 µm (10″ × 2.5″) |
| Stage 2 |
Granular activated carbon (GAC), 10″ × 2.5″ |
| Stage 3 |
CTO carbon block, 10 µm (10″ × 2.5″) |
| Stage 4 |
TFC RO membrane — 50 / 75 / 100 GPD (1812), made in USA |
| Stage 5 |
US-made Omnipure inline post-carbon |
| Adapters included |
¼″ and ⅜″ quick-connect elbows |
| Fits |
Standard 10″ × 2.5″ housings · standard 1812 membrane housings |
| Pre-filter life |
~6–12 months (water-quality dependent) |
| Membrane life |
~2–3 years |
| Brand |
MyWaterClub (compatible replacement set) |
| SKU |
RO5SET-50 / RO5SET-75 / RO5SET-100 (by membrane option) |
Free returns & exchanges
Not the right fit for your system? We’ll make it right. Contact us for a free return or exchange — we’d rather get you the correct set than have you keep one that doesn’t fit.
Related
All Replacement Sets
With & without RO membrane
View sets →
Please note: Reduction performance and filter life depend on your water chemistry, pressure, and usage, so results vary from home to home. This product is not certified to treat water of unknown quality and is not a substitute for testing your water. Descriptions use general, qualified language and are not health claims. When in doubt, test your water or ask us and we’ll help you choose the right set.
Reviews
There are no reviews yet.