Whole House Water Filter & Filtration Systems – Isopure Water
Whole House Water Filter & Filtration Systems – Isopure Water
New from IPW · Aero·RO Series
Pure water on demand. No tank required.
The Aero·RO S9 is a 700-gallon-per-day tankless reverse osmosis system. A built-in pump makes fresh RO water the moment you open the faucet — a steady ~0.48 GPM, with five stages of filtration in just two twist-off cartridges and a slim cabinet that frees up the space a tank used to take.
- 700 GPD tankless
- 5-stage filtration
- TDS monitoring
- Auto self-flush
- Tool-free filter changes
$325$375with code AERO50 · launch price ends Oct 31
Shop Aero·RO S9 See full specs
Ships from Santa Ana, CA1-year IPW warrantyReal support: (714) 541-6600
Launch price\ \ 700 GPD Production\ \ ≈0.48 GPM Steady flow\ \ ~6 in Cabinet depth
Here for something else? Find a replacement filter → Check your water quality → Build a whole-house system →
Water Filtration · Direct From the Source
Every drop in your home, crystal clear.
From a single sediment cartridge to a whole-house system — 4,500+ filters, membranes, and parts stocked in California and shipped fast, backed by people who actually know water.
Find Your Replacement Filter Check Your Water Quality Build Your Whole House System
4,500+ Products in stock
20+ yrs Filtration expertise
WQA Certified member · 20 years
Authorized dealer — genuine parts, no gray market
PentekWattsFleckClackOmnipureHydronixAqua Flo
Real support: (714) 541-6600
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Keep your water clean at home
→\ \ Filters & Cartridges\ \ Sediment · carbon · specialty · fridge](/content/collections/filters-cartridges-2020/index.html) →\ \ Whole House Systems\ \ Filter every tap in the home](/content/collections/whole-house-filtration-systems/index.html) →\ \ Under-Sink Filtration\ \ RO & countertop drinking systems](/content/collections/under-sink-countertop-water-filters/index.html) →\ \ Filtration Systems\ \ UV · softeners · spin-down & more](/content/collections/water-filtration-systems/index.html)
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What's in your water?
Look up your city's water. Then fix it.
Enter your ZIP and we'll pull local water quality data — chlorine, hardness, TDS, PFAS and more — then point you to the exact system and cartridges built for what's actually coming out of your tap.
Check your supply
ZIP codeSearch
Chlorine Elevated
Hardness 18 gpg
TDS 320 ppm
PFAS Detected
Filter Finder
Find your exact replacement filter
Tell us the system you have or the cartridge you're replacing, and we'll match you to the exact filters that fit.
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Taking a moment to wake up — open the Filter Finder in a new tab ↗
Isopure Water — Filter Finder
Find the right filter — no guesswork
Type your system or the number printed on your filter and we'll match it exactly. Don't have it handy? Just tell us what yours looks like.
What do you need a filter for?
Easiest: enter your system or the model/part number printed on your current filter.
🔎
don't have the number? tell us what yours looks like
A cartridge in a housingYou unscrew a sump/canister to swap it. Under-sink, RO, whole-house.Scan your filter’s labelSnap the printed model number and we’ll match it exactly.A whole system (RO or whole-house)Reverse-osmosis or whole-house / well unit — we'll show every filter it needs, by stage.
Still not sure? Measure it, send a photo, or chat with us →
What size cartridge does your housing take?
The hard constraint — it either physically fits or it doesn't.
← Start
💧Standard 10"10" × 2.5"Under-sink, RO, small whole-house.180 cartridges fit💧Standard 20"20" × 2.5"Double-length standard.114 cartridges fit🛢️Big Blue 10"10" × 4.5"Whole-house, high flow.108 cartridges fit🛢️Big Blue 20"20" × 4.5"Double-length whole-house.112 cartridges fit
Not sure? Measure the old cartridge. Most under-sink & RO systems use 10" × 2.5"; "Big Blue" housings are the fat 4.5"-wide ones.
What do you want it to do?
For housings.
← Size
🪨Sediment — dirt, sand & rustPleated, string-wound, melt-blown.🌫️Chlorine, taste & odorCarbon block, GAC & radial-flow.⚗️Specialty contaminantsFluoride, iron, lead, sulfur, scale.
Micron rating (optional)
Any micron0.5 µm1 µm5 µm10 µm20 µm50 µm
Your matches
← Change typeStart over
// Shareable URL
// Railway API (rule-based, existing tags)
Replacing a sealed inline filter
The easiest match is the number printed on your current filter.
← Start
🔎
Have your old filter handy?
Type the model/part number on it (e.g. “K2515”) — we’ll take you straight to the exact match, fitting and all.
Search by part #
or match by the fitting on the ends
🔌¼" Quick-Connectpush-in tubingMost common RO fitting. Tubing pushes straight in.21 filters🔌⅜" Quick-Connectpush-in tubingLarger push-in tubing.2 filters🔩⅛" Threaded (NPT)screw-in ⅛"Small threaded connection.3 filters🔩¼" Threaded (NPT)screw-in ¼"Threaded ¼ inch connection.27 filters🔩⅜" Threaded (NPT)screw-in ⅜"Threaded ⅜ inch connection.7 filters
🤔 Not sure which fitting you have? Here’s how to tell →
🔌
Quick-Connect (push-in)
Plastic tubing pushes straight into the cap and clicks in. No threads. Most RO systems use this.
🔩
Threaded (NPT / FPT)
The cap has screw threads — a fitting or pipe screws in. Measure across the opening: ⅛", ¼", or ⅜".
Still unsure? Send a photo of the ends and we’ll identify it →
Inline matches
← FittingStart over
// Railway API (inline, connection-keyed)
📸 Match your filter from a photo
Snap the label on your filter — we read the model and find the exact match plus compatibles.
← Start
📷
Take a photo or upload one
Point at the printed label / model number on your filter
No filter handy? Try a sample read:
K5522 labelK2515 labelCL10ROT40 labelWorn / blurry label
Reading the label…
Detecting model number
Start over
Add all stages to cartJust the ones due
// Railway API (curated junction table)
Exact match
← Start
Choose your system
Pick your unit and we’ll show every filter it needs, by stage.
← Start
🔍
All systemsReverse OsmosisUV & DisinfectionWhole-House
search = systems + filter part #s · housings = filter-size: + filter-type: · inline = filter-size:inline + connection · proprietary = curated junction table
Finder not showing? Open it in a new tab ↗
Photos of complete systems shown in the Filter Finder are for compatibility reference only — to help you identify your unit and the replacement filters that fit it. Isopure Water sells replacement filters, cartridges, and parts, not the branded systems pictured (unless a system is separately listed for sale on our store).
Learn
From the workbench
water cooler vs bottled water cost · Oct 2026\ \ Bottled Water vs. a Home Water Cooler: Which Is Actually Cheaper?\ \ Read article → how to test water at home · Oct 2026\ \ How to Test Your Water at Home (and What the Results Actually Mean)\ \ Read article → Spin-Down vs. Sediment Filters · Sep 2026\ \ Sediment Filters vs. Spin-Down Filters: What's the Difference?\ \ Read article →
Loox
Don Hee L.
The product offered great value for money and excellent quality, and the female staff member who...
Mark S.
It works perfectly.
Noreen G.
Cleaned well Good fit
Vernon P.
Good product. Ease of ordering and timely delivery makes Isopure my go to company.
Alicia F.
I am on a rain water catchment system. I collected rain water off the barn roof and use your...
Rj M.
Very efficient
David C.
Consistently great service!
Florencio H.
Culligan R/O AC30
Jerry L.
The replacement WaterPur housing for the water filter on my 11-year-old RV broke. This was the...
Tracey M.
Cover fits perfectly over the top
Jasmine S.
It was sent quickly 😊
Diana P.
Our water is iron rich so the 3 filters need to be changed often which is why I purchased in bulk.
Michael M.
The activated Charcoal keeps my house smelling like nothing! That’s a good thing. Plus it keeps...
Armando Armino P.
Always getting my filters from this supplier
Vernon P.
I have been using this coconut carbon in my aquarium room for years. Excellent product that keeps...
Duffy H.
Its the finer filter, the last one the water goes through.
Jonathan P.
Good filler, will buy more when I need replacement filters.
Charles M.
Always happy with order processing and product performance.
Charles M.
Alex N.
Great working with the team, especially Tai, his expertise in the field really help me make the...
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Hi there Meet the new Aero·RO S9, our 700 GPD tankless reverse osmosis system. Use code AERO50 for $50 off through Oct 31: https://www.isopurewater.com/discount/AERO50?redirect=/products/aero-ro-s9-700-gpd-tankless-reverse-osmosis-system
We're offline right now, but feel free to ask anything and we'll reply as soon as possible. To speak to a live agent, call our office at (714)-541-6600, Mon-Fri 9am-5pm.
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