Answered from our dataUpdated September 25, 2026

How much does a reverse osmosis system cost?

The 69 reverse osmosis systems we list run from $165 to $3,779, with a median of $367.

Prices are the list prices on our product pages, before installation.

  • 69 products behind this answer
  • 10 brands
  • updated September 25, 2026

Counted from the prices on our product pages. How we score and check

The 69 products behind this answer

Best overall score first. Each links to its full review, where the score is broken down.

Some links on this page earn us a commission. It never affects our scores or rankings. How this works

Waterdrop G3P600 Tankless Reverse Osmosis System, 600 GPD
Waterdrop G3P600 $539

1st of 69 in Reverse Osmosis

7.6
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Waterdrop G3P800 Tankless Reverse Osmosis System, 800 GPD
Waterdrop G3P800 $999

2nd of 69 in Reverse Osmosis

7.5
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APEC Water Systems ROES-50 Essence 5-Stage 50 GPD Reverse Osmosis System
APEC Water Systems ROES-50 $231

4th of 69 in Reverse Osmosis

7.3
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APEC Water Systems ROES-PH75 Essence Alkaline 6-Stage 75 GPD Reverse Osmosis System
APEC Water Systems ROES-PH75 $269

3rd of 69 in Reverse Osmosis

7.3
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Express Water RO5DX 5-Stage Reverse Osmosis System
Express Water RO5DX $190

5th of 69 in Reverse Osmosis

7.1
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APEC Water Systems RO-90 Ultimate 5-Stage 90 GPD Reverse Osmosis System
APEC Water Systems RO-90 $265

6th of 69 in Reverse Osmosis

7.0
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APEC Water Systems RO-PH90 Ultimate Alkaline 6-Stage 90 GPD Reverse Osmosis System
APEC Water Systems RO-PH90 $410

7th of 69 in Reverse Osmosis

6.9
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Aquasana SmartFlow Reverse Osmosis Under Sink Water Filter, 90 Contaminants
Aquasana SmartFlow RO $450

9th of 69 in Reverse Osmosis

6.7
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Waterdrop K19-S Countertop Reverse Osmosis System
Waterdrop K19-S $309

8th of 69 in Reverse Osmosis

6.7
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iSpring RCC7AK 6-Stage Alkaline Reverse Osmosis System, 75 GPD
iSpring RCC7AK $242

10th of 69 in Reverse Osmosis

6.7
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APEC Water Systems RO-Hi Ultimate Fast Flow 5-Stage 90 GPD Reverse Osmosis System
APEC Water Systems RO-Hi $368

11th of 69 in Reverse Osmosis

6.6
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Waterdrop K19-H Instant Hot Countertop RO System
Waterdrop K19-H $379

12th of 69 in Reverse Osmosis

6.6
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iSpring RCC7-BLK 5-Stage Reverse Osmosis System, Black Faucet, 75 GPD
iSpring RCC7-BLK $242

13th of 69 in Reverse Osmosis

6.6
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APEC Water Systems ROTL-A1000 Tankless 4-Stage 1000 GPD Reverse Osmosis System
APEC Water Systems ROTL-A1000 $599

14th of 69 in Reverse Osmosis

6.5
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US Water Systems American Made Reverse Osmosis System
US Water Systems American Made RO $649

15th of 69 in Reverse Osmosis

6.4
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Waterdrop D6 Under Sink Reverse Osmosis System, 600 GPD
Waterdrop D6 $399

16th of 69 in Reverse Osmosis

6.4
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iSpring RCC7 5-Stage Reverse Osmosis System, 75 GPD
iSpring RCC7 $231

17th of 69 in Reverse Osmosis

6.3
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Express Water ROC001 Countertop RO with Instant Hot
Express Water ROC001 $300

18th of 69 in Reverse Osmosis

6.2
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Express Water ROC001ALK Countertop RO with pH and Instant Hot
Express Water ROC001ALK $427

18th of 69 in Reverse Osmosis

6.2
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Express Water RO10 5-Stage RO System with Deluxe Chrome Faucet
Express Water RO10 $207

20th of 69 in Reverse Osmosis

6.2
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Express Water ROALK10 Alkaline Reverse Osmosis System
Express Water ROALK10 $233

20th of 69 in Reverse Osmosis

6.2
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Waterdrop G2P600 Under Sink RO System, 600 GPD
Waterdrop G2P600 $360

20th of 69 in Reverse Osmosis

6.2
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Express Water Model 6 ROT600 600 GPD Tankless RO System
Express Water Model 6 ROT600 600 GPD $395

23rd of 69 in Reverse Osmosis

6.2
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Express Water Model 6 ROT600ALK Tankless RO with Remineralization
Express Water Model 6 ROT600ALK $433

23rd of 69 in Reverse Osmosis

6.2
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Waterdrop K6 Instant Hot Reverse Osmosis System
Waterdrop K6 $799

23rd of 69 in Reverse Osmosis

6.2
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Aquasure Premier Advanced 75 GPD RO System
Aquasure Premier Advanced 75 GPD $190

26th of 69 in Reverse Osmosis

6.1
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Express Water ROELITE9 Elite Alkaline Reverse Osmosis System
Express Water ROELITE9 $307

27th of 69 in Reverse Osmosis

6.1
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APEC Water Systems ROES-100 Essence 5-Stage 100 GPD Reverse Osmosis System
APEC Water Systems ROES-100 $240

28th of 69 in Reverse Osmosis

6.1
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APEC Water Systems ROTL-AIO All-in-One Tankless 600 GPD Reverse Osmosis System
APEC Water Systems ROTL-AIO $300

30th of 69 in Reverse Osmosis

6.1
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Express Water ROALKUV10 Alkaline UV Reverse Osmosis System
Express Water ROALKUV10 $299

30th of 69 in Reverse Osmosis

6.1
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Kind Water Systems 6-Stage Reverse Osmosis Drinking Water System
Kind Water Systems 6-Stage RO $470

29th of 69 in Reverse Osmosis

6.1
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Express Water EZRO5 Countertop Reverse Osmosis System
Express Water EZRO5 $165

32nd of 69 in Reverse Osmosis

6.1
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Express Water RODI10 Deionization Reverse Osmosis System
Express Water RODI10 $231

33rd of 69 in Reverse Osmosis

6.1
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Waterdrop N1 Countertop Reverse Osmosis Dispenser
Waterdrop N1 $299

34th of 69 in Reverse Osmosis

6.1
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Express Water ROUV10 Ultraviolet Reverse Osmosis System
Express Water ROUV10 $270

35th of 69 in Reverse Osmosis

6.0
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iSpring RO500-BN 3-Stage Tankless Reverse Osmosis System, 500 GPD
iSpring RO500 $660

36th of 69 in Reverse Osmosis

6.0
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iSpring RO500AK-BN 3-Stage Alkaline Tankless Reverse Osmosis System, 500 GPD
iSpring RO500AK-BN $693

36th of 69 in Reverse Osmosis

6.0
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APEC Water Systems RO-CTOP-C Portable Countertop 90 GPD Reverse Osmosis System
APEC Water Systems RO-CTOP-C $270

38th of 69 in Reverse Osmosis

5.9
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iSpring RCC7AK-UV 7-Stage Alkaline UV Reverse Osmosis System, 75 GPD
iSpring RCC7AK-UV $357

38th of 69 in Reverse Osmosis

5.9
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iSpring RCC7P 5-Stage Reverse Osmosis System with Booster Pump, 75 GPD
iSpring RCC7P $364

40th of 69 in Reverse Osmosis

5.9
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APEC Water Systems ROES-PHUV75 Essence Alkaline UV 7-Stage 75 GPD Reverse Osmosis System
APEC Water Systems ROES-PHUV75 $367

41st of 69 in Reverse Osmosis

5.9
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APEC Water Systems ROTL-600 Premium Tankless 3-Stage 600 GPD Reverse Osmosis System
APEC Water Systems ROTL-600 $600

42nd of 69 in Reverse Osmosis

5.9
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APEC Water Systems RO-PERM Ultimate Permeate Pumped Reverse Osmosis System
APEC Water Systems RO-PERM $370

43rd of 69 in Reverse Osmosis

5.8
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Aquasure Premier Advanced Alkaline 75 GPD RO System
Aquasure Premier Advanced Alkaline 75 GPD $220

44th of 69 in Reverse Osmosis

5.8
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Aquasure Premier Pro 100 GPD RO System
Aquasure Premier Pro 100 GPD $240

44th of 69 in Reverse Osmosis

5.8
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iSpring RCC7P-AK 6-Stage Alkaline Reverse Osmosis System with Booster Pump, 75 GPD
iSpring RCC7P-AK $378

44th of 69 in Reverse Osmosis

5.8
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APEC Water Systems RO-QUICK90 Ultimate Compact 4-Stage 90 GPD Reverse Osmosis System
APEC Water Systems RO-QUICK90 $250

47th of 69 in Reverse Osmosis

5.8
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APEC Water Systems ROCT-C1 Countertop UV Reverse Osmosis System with Chilled Water
APEC Water Systems ROCT-C1 $499

48th of 69 in Reverse Osmosis

5.7
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iSpring RO5004F 6-Stage Tankless Reverse Osmosis System with UV, 500 GPD
iSpring RO5004F $330

48th of 69 in Reverse Osmosis

5.7
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Waterdrop G2 Tankless Reverse Osmosis System, 400 GPD
Waterdrop G2 $300

48th of 69 in Reverse Osmosis

5.7
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iSpring RO800G 2-Stage Tankless Reverse Osmosis System, 800 GPD
iSpring RO800G $528

51st of 69 in Reverse Osmosis

5.7
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iSpring RO800G+UVF8 2-Stage Tankless Reverse Osmosis System with UV, 800 GPD
iSpring RO800G+UVF8 $620

51st of 69 in Reverse Osmosis

5.7
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iSpring RO1200 4-Stage Dual-Flow Tankless Reverse Osmosis System, 1200 GPD
iSpring RO1200 $700

53rd of 69 in Reverse Osmosis

5.7
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iSpring RO1200AK 4-Stage Alkaline Dual-Flow Tankless Reverse Osmosis System, 1200 GPD
iSpring RO1200AK $751

54th of 69 in Reverse Osmosis

5.6
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Crystal Quest Countertop Reverse Osmosis System
Crystal Quest Countertop RO $202

55th of 69 in Reverse Osmosis

5.6
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iSpring RCC7D 6-Stage Deionization Reverse Osmosis System, 75 GPD
iSpring RCC7D $303

56th of 69 in Reverse Osmosis

5.6
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iSpring RO5004F-AK 6-Stage Alkaline Tankless Reverse Osmosis System with UV, 500 GPD
iSpring RO5004F-AK $420

57th of 69 in Reverse Osmosis

5.5
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iSpring RO600-BN 3-Stage Tankless Reverse Osmosis System, 600 GPD
iSpring RO600 $449

57th of 69 in Reverse Osmosis

5.5
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Aquasure Premier Elite 100 GPD RO System with Pump
Aquasure Premier Elite 100 GPD $340

59th of 69 in Reverse Osmosis

5.5
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Crystal Quest Thunder 1000C Ultrafiltration Reverse Osmosis Under Sink Water Filter
Crystal Quest Thunder 1000C RO $298

60th of 69 in Reverse Osmosis

5.5
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iSpring RO1000-BN Tankless Reverse Osmosis System, 1000 GPD
iSpring RO1000-BN $1,264

61st of 69 in Reverse Osmosis

5.4
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iSpring RCS5T 5-Stage Commercial Tankless Reverse Osmosis System, 500 GPD
iSpring RCS5T $683

62nd of 69 in Reverse Osmosis

5.2
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iSpring PH100 6-Stage Alkaline Under-Sink Reverse Osmosis System, 100 GPD
iSpring PH100 $374

63rd of 69 in Reverse Osmosis

5.2
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iSpring RO100 5-Stage Under-Sink Reverse Osmosis System, 100 GPD
iSpring RO100 $320

63rd of 69 in Reverse Osmosis

5.2
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iSpring RCS10T 5-Stage Commercial Tankless Reverse Osmosis System, 1000 GPD
iSpring RCS10T $740

65th of 69 in Reverse Osmosis

5.1
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iSpring CRO2000 4-Stage Commercial Tankless Reverse Osmosis System, 2000 GPD
iSpring CRO2000 $3,779

66th of 69 in Reverse Osmosis

5.0
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iSpring RCB3P 300 GPD Light Commercial Reverse Osmosis System with Booster Pump
iSpring RCB3P $704

67th of 69 in Reverse Osmosis

4.9
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iSpring CRO1000 4-Stage Commercial Tankless Reverse Osmosis System, 1000 GPD
iSpring CRO1000 $1,470

68th of 69 in Reverse Osmosis

4.8
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FilterSmart 4-Stage 50 GPD Reverse Osmosis System
FilterSmart 4-Stage $479

69th of 69 in Reverse Osmosis

4.3
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What this means

  • Equipment only. The prices on our product pages.
  • Running costs are not included. Installation, replacement filters, and salt for a softener.
  • Plan for what comes after. Filters and salt are bought again for as long as you own it.

The ranked lists

Every product we score in these categories, in order, with the reasons for each place.

1Waterdrop G3P600 2Waterdrop G3P800 3APEC ROES-PH75 The best reverse osmosis systems First: Waterdrop G3P600. Top 10 of 69 scored, 17 September 2026. See the ranking

Compare them head to head

Comparisons in Reverse Osmosis between products and brands in this answer.

Reverse OsmosisAPEC ROES‑PHUV75 vs Express Water ROALKUV105.9 vs 6.1Reverse OsmosisAPEC ROES‑PHUV75 vs Express Water ROUV105.9 vs 6.0Brand comparisonWaterdrop vs APEC Water SystemsEvery product both brands sell

Related questions

Counted from our data September 25, 2026 · How we score · All answers

About

We compare products properly: every one scored against published criteria, with what independent sources actually say kept separate from our own assessment.

The method is published so you can see what a score means. Where evidence is missing, the page says so rather than showing an invented number.

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