Do these 3 things before closing this tab:
1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minuteSpecial offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.
Waterdrop’s October Prime Big Deal Days promotion runs October 6–7, 2026, and covers reverse-osmosis systems, a countertop hot-and-cold dispenser, under-sink filters and refrigerator replacements. The prices below are dated reports from Waterdrop or Bob Vila, not confirmed live Amazon prices; check each listing for current price, stock and eligibility before buying.
Which Waterdrop products are included?
The promotion spans several kinds of water-treatment products, so start by comparing what each one does and how it fits your kitchen. A countertop unit avoids plumbing work; an under-sink system connects to kitchen plumbing; simpler filters and refrigerator cartridges serve narrower use cases. They are not interchangeable, and a standard filter should not be treated as equivalent to a full reverse-osmosis system.
| Product | Reported offer | What to know |
|---|---|---|
| Waterdrop X12 reverse-osmosis system | Waterdrop’s September 30 release lists $899, down from a stated $1,299 MSRP (31% off). | Company-announced promotion price; not independently confirmed as a live Amazon price. Waterdrop’s announcement |
| Waterdrop KJ600 (K6) instant-hot reverse-osmosis system | Bob Vila reported $499, compared with $799, on October 6. | Publisher-reported deal; check the current listing. Bob Vila’s deal report |
| Waterdrop CT01 instant hot-and-cold water dispenser | Waterdrop lists $199.49 versus a $289.99 MSRP. | The company describes it as installation-free, with six-stage filtration, 1.32-gallon capacity, hot and cold filtered water from 59°F to 203°F, and no wastewater. These are manufacturer descriptions. Waterdrop’s announcement |
| TSA, TSU and 10UA under-sink filters | Waterdrop says offers are up to 32% off. | Compact under-sink options for households that do not want a full RO system; the release does not state an individual price for each model. Waterdrop’s announcement |
| Waterdrop refrigerator replacement filters | Waterdrop says offers are up to 34% off. | Replacements are listed for selected LG, Whirlpool, GE and other refrigerator models. Confirm the exact refrigerator model before ordering. Waterdrop’s announcement |
How to choose the right type
Choose by installation and use
- Want to avoid under-sink installation? Consider a countertop dispenser or countertop RO system. The CT01 is a dispenser; the KJ600/K6 is an RO system with an instant-hot feature, so compare the function you actually need.
- Want filtration integrated with the kitchen plumbing? Compare under-sink RO systems such as the X12 with simpler under-sink filters such as the TSA, TSU and 10UA. They are different product categories, not equivalent levels of treatment.
- Only need a refrigerator cartridge? Shop by the refrigerator’s exact model number and the replacement-filter compatibility information, rather than by brand name alone.
Compare ongoing ownership, not only the sale price
Before choosing a system, check its available output against household demand, the space it requires, and whether its dispensing features are useful in your kitchen. Include replacement-filter cost and availability in the comparison: a discounted system can still require recurring model-specific cartridges. Waterdrop’s catalog lists model-specific replacements, including X Series and K6 examples, with different stated replacement intervals. Check Waterdrop’s replacement-filter catalog and confirm that the cartridge matches the exact system.
What to verify before ordering
- Open the Amazon listing during the October 6–7, 2026 promotion and verify the current price, stock and deal eligibility. The prices reported above are not a guarantee of the live listing price.
- Confirm the full system model and, for refrigerator cartridges, the refrigerator’s exact model number.
- Review the product’s installation requirements, dimensions, capacity and dispensing features against your household’s needs.
- Check the price, availability and stated replacement interval for compatible filters before comparing total ownership costs.
- Read performance or certification claims with care. The promotion announcement alone does not establish independent test results or confirm that a product makes water safe from a particular contaminant.
Amazon offers versus Waterdrop’s own-site sale
Waterdrop’s announcement says the promotion is available through Amazon and the company’s own store. Its official home page also displayed a Prime Fall Sale for October 6–7, alongside models including G3P800 and M6CG; that broader lineup does not establish that those models are part of the specific Amazon deal. Waterdrop’s home page
Free tools Windows power users keep installed
One-click scans. No signup required.
Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.
#1 Best Overall
Sale
Waterdrop G3P600 Tankless Reverse Osmosis Water Filter System, 600 GPD
- [Trusted certifications]: Waterdrop G3P600 reverse osmosis system is certified against NSF/ANSI 58 for TDS reduction and NSF/ANSI 372 certified for lead-free material. Also it has been tested and certified against NSF 42 to reduce chlorine, bad taste and odor. The tankless reverse osmosis system is also certified by the Federal Communications Commission. Besides, it meets the EU Standards and UKCA Standards for safety
- [8-stage filtration]: Tested by official third-party laboratory (SGS), the reverse osmosis system can effectively reduce TDS, chromium, PFAS, radium, fluoride, arsenic salt, iron, calcium, particles, chloride, chlorine and radioactive substances in your tap water. And our RO water filter system can reduce chemicals such as vinyl chloride, ethylhexyl acrylate, isobutylene, ethylene glycol, according to the reverse osmosis membrane technical manual
- [Smart display faucet]: The tankless reverse osmosis system is built with a smart display faucet. For instance, the TDS monitor tells you the quality of your filtered water, while the filter life tracker shows how soon you need to replace your filter
- [High capacity, 2:1 low drain ratio]: As an upgraded reverse osmosis system, this reverse osmosis water system produces 600 gallons of filtered water per day. By its low drain ratio, this system can produce only one cup of waste water for every two cups of pure water produced. Furthermore, with a fast and stable water flow rate, this RO system fills a 8 oz cup of water in 8 seconds, which is ideal for drinking and washing vegetables
- [Tankless design]: Waterdrop G3P600 reverse osmosis system has a stylish look. This tankless design saves 70% under sink space. You can change a filter in 3 seconds without moving the system or using any tools. Note: This reverse osmosis system requires under-sink electricity
Waterdrop’s separate clearance page showed offers for the G2, G5P700-PRO and G5P500. Those direct-site clearance listings are distinct from the Amazon Prime Big Deal Days prices. Waterdrop’s clearance page
Quick Recap
Best Value
Sale
Waterdrop G2P600 Under-Sink RO System, 600 GPD Tankless Water Filtration
- [NSF/ANSI 372 Certified] 600 GPD & 2:1 lowdrain ratio & Tankless Design & Easy installation. Two filters are included in the package. Search "G2P600" for replacement filters
- [7-stage filtration] The G2P600 system is certified by NSF/ANSI 372 for lead-free materials
- [600 GPD fast water flow] As an upgraded reverse osmosis system, the G2P600 tankless reverse osmosis system produces 600 gallons of filtered water per day. With a fast and stable water flow rate, this RO system fills a 200ml cup with water in 8 seconds, which is ideal for drinking, washing vegetables and fruit. The G2P600 RO water filtration system also meets the water needs of big families and companies
- [Affordable choice] The G2P600 tankless RO system reduces your replacement cost and upgrades the water-saving technology with a drain ratio of 2:1. Dispensing 2 cups of pure water will produce only 1 cup of waste water. Compared to traditional RO water purifiers, the RO system saves 60% more water. You can use waste water to mop the floor, wash your car, do laundry, etc.
- [Superior product design] You can finish the installation by yourself in 30 minutes. Due to the filter’s twist-and-pull design, you can change a filter in 3 seconds without moving the system or using any tools. In addition, the filter life indicators will remind you to replace the filter in advance
Rank #4
Sale
Waterdrop X12Alkaline Mineral Reverse Osmosis System 1200 GPD Silver Faucet
- [Trusted certification] Tested and certified by IAPMO R&T against NSF/ANSI 42 & 58 & 372 standard, and tested by SGS to reduce harmful substances
- [1200 GPD fast filtration] Experience the ultimate upgrade in water purification with our 1200 GPD high-speed tankless reverse osmosis water filter. Designed for family efficiency, it delivers healthy water, ensuring no more waiting, just instant, pure hydration for you at home
- [11-Stage RO filtration] This reverse osmosis water filter features 11-stage precision filtration including a robust 0.0001 μm RO membrane, composed of 16 layers. Enhanced with an LED light for assured water safety. It has been tested by SGS to reduce TDS, PFOA, PFOS, Chlorine, Fluoride, Arsenic, Lead and more, delivering healthy, pure water for you
- [Healthy alkaline minerals] This under-sink RO system uses innovative healthy boost-tech to infuse alkaline minerals such as Ca, Mg, etc. Not only enhances your health, and strengthens your bones, but also elevates your cooking and drinking flavors
- [Smart & elegant design] This reverse osmosis system features a smart digital faucet that supports quantitative water output to meet your various needs. At the same time, TDS and filter life are clearly displayed, making it easy to keep track of your water quality. Our elegant tankless design makes DIY installation a breeze and saves more under-sink space
Rank #3
Sale
Waterdrop G2 Reverse Osmosis System, 400 GPD Tankless RO Water Filtration
- [NSF/ANSI 372 Certified] 400 GPD & 1:1 low drain ratio & Tankless Design & Easy installation. Two filters are included in the package. Search "Waterdrop G2CF" and ''Waterdrop G2MRO' for replacement filters
- [7 Stage Filtration & effective filtration] The G2 system is certified by NSF/ANSI 372 for lead-free materials. The G2 RO System adopts a composite filter result in more effective filtration.
- [400 GPD & 1:1 pure to drain ratio] The Waterdrop G2 reverse osmosis system offers a fast water flow rate of up to 400 GPD. Get a cup of filtered water in about 12 seconds, satisfying your needs while saving time. Compared to the ordinary RO system, the Waterdrop RO system always has a stable water flow. This tankless RO has a low drain ratio of 1:1 and saves water waste by 300%
- [Innovative tankless design] The tankless design ensures the safety of your family’s drinking water. It also saves over 70% more under-sink storage space than does the ordinary RO system. Note that this reverse osmosis system requires under-sink electricity
- [Integrated product design] The advanced integrated design of the electrical and water circuits reduces leakage. The airtight housing reduces noise, while the process of installing and replacing the filter is faster and more convenient than with other filters. Due to the filters’ twist-and-pull design, you can replace them in 3 seconds. The installation of the RO System takes less than 30 minutes. NOTE: An electrical outlet and drilling holes is required to operate it
Rank #2
Sale
Waterdrop G3P800 Tankless Reverse Osmosis Water Filter System, 800 GPD
- [10-Stage filtration] Tested by official third-party laboratory (SGS), through 10-stage filtration, G3P800 can effectively reduce PFAS, fluoride, heavy metals like lead, chromium, iron, salts like nitrate and chloride as well as large particles and radioactive substances such as radium. Our RO system can reduce such as vinyl chloride, ethylhexyl acrylate, isobutylene, monobutyl ether, according to the reverse osmosis membrane technical manual
- [NSF/ANSI standard 42 & 53 & 58 & 372 certified] This tankless reverse osmosis system is certified by IAPMO R&T against NSF/ANSI 58 for reduction of TDS; NSF 42 & 53 to reduce chlorine, bad taste, odor and so on. Besides, the system is certified by NSF/ANSI 372 for lead-free materials
- [800 GPD high capacity, 3:1 pure to drain ratio] The Waterdrop G3P800 reverse osmosis system offers a higher water capacity (800 gallons per day), thereby meeting demands of a big family for pure water. Furthermore, by high water flow, it filters one cup of water in just 5s. By an advanced water dispensing technology, this tankless RO water filter system produces just a cup of wastewater for every three cups of filtered water produced
- [Smart faucet, LED function] G3P800 is equipped with a smart faucet, by which you can get the TDS level and water quality at a glance. The lifespan of LED lamp is up to 50 years. The LED can be automatically turned on when water flows by
- [Stylish look, tankless design] The RO system G3P800 has a stylish look. The tankless design saves under sink space and ensures the safety of water. The system can consistently produce water and ensures purity in every drop. You can get purified water anytime without waiting
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.
