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Recent Product Reviews

Countertop Cold & Hot Water Purifier ★★★★★

저희 모든 가족들이 요즘 정수기 설치후 물을 자주 마시고 건강해 진것 같아요. 물맛도 너무 좋고 무엇보다 언제든지 따뜻한 물을 마실수 있어서 저희 87세 어머님이…

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Countertop Cold Water Purifier ★★★★★

Having to carry heavy bottles of water home from the grocery store is such a hassle, and the cost is pretty comparable to renting…

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All-In-One Under Sink Water Purifier ★★★★★

설치를 친절히 잘 해주셨습니다 잘 쓰고 있어요

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Countertop Cold Water Purifier ★★★★★

I love my Coway water purifier! Very convenient and easy to use daily. Water tastes really good and crispy. All my family and friends…

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Countertop Cold Water Purifier ★★★★★

I’m very happy with my Coway water purifier! The design is sleek and modern, and it fits perfectly in my kitchen. It’s very easy…

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11월 프로모션November Promotion주문 10/29 ~ 11/24Orders 10/29 - 11/24

Monthly Rental $19.99Monthly rental $19.99

6년 신규 렌탈 고객 · 전 제품 · 혜택은 12월부터 적용New 6-year rentals · all products · benefit starts in December

일시불 할인 공기청정기 AP-2021A 50% · 비데 BAS-42 20%Outright purchase AP-2021A 50% off · BAS-42 bidet 20% off

프로모션은 회사 사정에 따라 변경·조기 종료될 수 있습니다Promotion may change or end early at the company discretion

View Eligible Models & Details →See eligible models and terms →
Check Current Promotions

Monthly rental and purchase benefits and eligible models are listed on the promotions page.

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From Application to Installation

  1. 1KakaoTalk or phone
    Consult
  2. 2Place your orderProduct · Address
  3. 3AgreementAutoPay
  4. 4Scheduling
  5. 5InstallationMaintenance by Model
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주방 싱크대 하부에 복잡하게 설치된 역삼투압(RO) 정수기 필터와 거대한 저장 탱크
RO 탱크 관리의 현실 | 정수기 렌탈을 고려하는 이유
PRODUCT GUIDE · RO TANK CARE

The Reality of RO Tank Maintenance
Why Consider a Water Purifier Rental

RO purifiers can supply water relatively steadily even in low-pressure environments. But because they store purified water in a tank, consider how the unit will be maintained after installation. The differences between tankless and RO systems can be found on the CowayCA Product Comparison Page.

Key takeaway
With an RO tank-type purifier, what matters more than choosing the product is how consistently you can get filter replacements, tank inspections, cleaning, and repair service. Whether buying or renting is right for you depends on your maintenance situation and contract terms.

Why does an RO tank need maintenance?

An RO water purifier collects purified water in a storage tank and supplies it on demand. Because the water sits in storage, its taste or smell can vary depending on usage frequency, room temperature, tank design, and filter condition.

Stored waterWater sits in the tank for a period of time
Usage environmentCondition varies with temperature and usage frequency
Maintenance cycleFilters, tank, and hoses need regular inspection

Rather than a defect specific to one product, this is a maintenance factor common to any purifier that uses a storage tank.

Signs that the purifier may need attention

  • The first water in the morning smells or tastes different than usual
  • The filter replacement date has passed
  • Using the unit again after an extended absence from home
  • Tank cleaning or sanitizing hasn't been done in a long time
  • Water flow or condition has changed from before
Note: Hygiene can't be judged by tank material or stagnation time alone. The actual condition depends on the product's design, the usage environment, and the filter and tank maintenance history.

Does a PP tank eliminate the need for maintenance?

PP is known as a relatively durable, heat-resistant material and is sometimes used for purifier tanks. However, using PP alone does not eliminate the need for cleaning and inspection.

What matters is not just the tank material, but the overall maintenance system: filter replacement cycle, internal inspection method, whether in-home service is provided, and the scope of repairs.

The main difference between buying and renting is maintenance responsibility

Purchase

You own the unit and can decide on long-term use yourself. On the other hand, you may need to manage filter replacement, tank cleaning, and part replacement or repair schedules on your own.

  • Consider upfront cost and ownership
  • You manage the maintenance schedule yourself
  • Filter and repair costs may be charged separately

Rental

You pay a monthly fee for a set period and, depending on the contract, receive filter replacements or in-home maintenance visits. This can reduce your maintenance burden, but you should check the scope of service for your model and contract.

  • Spreads out the upfront cost
  • Check whether regular maintenance visits are included
  • Check the contract term, cancellation, and relocation terms

What to confirm before signing a rental contract

01Are filter replacements included?
02What tank cleaning and sanitizing is covered?
03What are the repair and relocation terms?
What to checkWhat to confirm during consultation
In-home serviceVisit frequency and how to schedule
Filter careWhat is replaced and whether the cost is included
Tank careWhether cleaning/sanitizing is provided and its scope
ServiceTerms for malfunctions, leaks, and part replacement
ContractTerm, tax, early cancellation, and relocation/reinstallation fees

What should low-pressure households check first?

If water pressure drops in the early morning, or you need a lot of water right away in the morning, a tank-type RO is worth considering. Because it draws on stored water, it can feel steadier than a tankless model during brief pressure dips. Once you've chosen your installation environment and product type, see the Coway Water Purifier Product Pagefor model-by-model details.

That said, if water pressure is too low, refilling the tank can take longer. Before deciding on a product, check the actual water pressure at the install site, your household's daily water use, and the scope of maintenance service.

Conclusion: Maintenance matters more than the RO label

An RO tank-type purifier can be a good choice in low-pressure environments. However, since it stores water in a tank, the filter and tank need consistent maintenance.

Buying lets you own the unit, but maintenance responsibility may fall on you. Renting comes with a monthly fee, but depending on the contract, you can access regular maintenance and repair service, which can help reduce the maintenance burden.

So rather than assuming renting is always better, the most realistic approach is to compare whether you have the time and willingness to maintain it yourself, whether the upfront cost or the monthly cost is easier on you, and what service is actually included. After comparing the buying and rental terms, Water purifier consultationcan help you confirm the right terms for your installation environment.

Water purifier consultation for your home

Be sure to check the water pressure at your install location, your household's water usage, and how maintenance is handled. CowayCA helps with consultation and order intake; final contract and payment terms follow Coway USA's official process and product-specific terms.

Category: Product Guide · Last updated: 2026-10-18 · Please confirm service and pricing for your specific product during consultation.
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