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Waterdrop Reverse Osmosis Tankless Water Filter System With UV Sterilizing Light | G3P800


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Price: $999.00 USD
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Price: $999.00 USD
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Availability: 100 in stock

Most orders ship within 2-3 business days

If you want the cleanest water possible, this is it.

The G3P800 is the upgrade version of Waterdrop’s legendary G3 water filtration system. Much like its predecessor, the G3P800 is an affordable, consumer friendly reverse osmosis system for everyday use at home. The advanced UV (ultraviolet) light anchors this complete package; it reduces up to 99.9% of bacteria and viruses that may be present in your water.

✅  30-MIN INSTALL: Perfect for the do-it-yourselfer. Use the provided instructions for a simple 30-min install without any tools. Twist-and-pull to switch out filters in 3 seconds.

✅  KILLS 99.9% BACTERIA AND VIRUSES: Brand new LED UV technology sterilizes the water, and only activates when the water is passing through to save energy.
  24/7 CLEAN WATER: Upgraded filters and 7-layer RO membrane reduces chlorine, heavy metals, and other contaminants typically found in municipal water.
  SAVES MORE WATER: Helps save the environment with a 3:1 drain ratio, meaning only 1 cup of waste water for every 3 cups of purified water produced.
✅   RESULTS YOU CAN SEE: Total Dissolved Solids (TDS) monitor displays the water quality in real time and filter lights indicate when it's time to be changed.

Smart LED UV Water Sterilizer

Eliminates up to 99.9% of bacteria and viruses in your water with pure UV light. Only turns on when water is pumping, saving you energy and optimizing efficiency. You'll never have to replace the UV light as it lasts up to 50 years.

 Get More For You Money

With a 3:1 drain ratio, the G3P800 produces 3 times as much purified water for each unit of waste water than the WD-G3. Saves you money on your water bill and it's better for the environment, how cool is that?


Experience exceptionally great tasting water. The G3P800 reduces 1000+ harmful substances such as chlorine, heavy metals and other impurities.

Levels Up With Improved Materials

Big House / Big Office? No Problem

With the 800 Gallon Per Day output, this system keeps everyone hydrated, even in big houses and offices. 

Larger Capacity Faster Flow

Water Quality You Can See 👀

Keep tabs on your Total Dissolved Solids (TDS) with the real-time display on the front of the unit. Take the guessing out of filter life with the easy to read lifespan indicators.

Visible Water Quality

Saves Space

Join the tankless revolution, saving space and complexity under the sink. 

Effortless Installation




Filter Type (Included with purchase) Replace Every


6 Months


12 Months


24 Months
WD-MNR35 (Included with "remineralization" version only) 12 Months

Technical Specifications 
Model WD-G3P800-W
Size (L*W*H) 18.06”*5.65”*17.75”
Feed water temperature 41-100℉/ 5-38℃
Feed water pressure 14.5-87 psi/ 0.1-0.6 MPa
Feed water requirement Municipal tap water
Max daily production rate 800 GPD

G3 Instruction Manual

Shipping & Returns

As soon as you place your order, you will receive an order confirmation e-mail. This means that we have received your order in our system and pre-authorized your credit card for the purchase.  If your item is on backorder or unavailable, we will void the pre-authorization and reach out to you via e-mail.  If your item(s) are available for immediate shipment (within 3-5 business days), we will process the charges and submit the order for shipment.

Click here for detailed shipping and returns policy

Cancellation Policy

If you wish to cancel an order, please contact

If you contact us within 24 hours of purchase: We can cancel the order for you at no additional cost. The cancellation may take up to 3 days, thank you for your patience and understanding.

If the package is already shipped, we will issue a prepaid label and return your payment AFTER we have received the package from you. If you contact us after 24 hours of purchase: You need to bear the return fee if the package is already shipped (depends on our system, not the order status). The product has to be damage-free, packed in the packaging we sent to you, and with the original receipt of the purchase. We will return your payment AFTER we have received the package from you.

Return Policy

If you want to return the item, you need to bear the return fee yourself and pay 20% of the original order as a restocking fee. If you would like to return a product, please follow these guidelines: Reach out to for a Return Authorization. No returns will be honored without a Return Authorization. The package needs to come back with the original receipt of the purchase. The product has to be in the packaging we sent in the first place. The product has to be damage-free (not applicable for defective products), damage on the product will void the refund.

We offer a 30-day return guarantee. Warranty will begin from the date the product is received. If a product grows defective during the warranty period due to a quality issue rather than your own breakage or misuse, we can accept a return, provide free repair service, or issue a new replacement.

If you received a damaged / incorrect item and you want to file a claim, please email together with your order information and a picture of the damaged / incorrect product. We are eager to help.

Refund Policy

There are times when we may not have the product(s) that you choose in-stock or may face some issues with our inventory and quality check. In such cases, we may have to cancel your order. You will be intimated about it in advance so that you do not have to worry unnecessarily about your order. If you have purchased via online payment, then you will be refunded once our team confirms your request.

After receiving your request or your packages, it may take up 3-10 business days to refund your money.


Price Match

We work very hard to ensure that we offer the absolute best prices online.  If you find another online store that offers a lower price then us within six months of your purchase date please let us know by contacting us and we will refund your original payment for the difference. We want you to feel confident that you are getting the absolute best price for the product you are ordering.  If you find that our own website has a lower price for the same item you have ordered within six months of your purchase date will refund the difference as well.

To request your partial refund simply e-mail us a link to the same product on our website, or on our competitors website within six months from the date of your order and we will process the credit accordingly.

Our 100% Price Guarantee has some limitations:

  • You must purchase the item from our website before requesting your Price Match Guarantee
  • Promotions such as rebates and buy one, get one free offers are not eligible
  • The item must be in stock on the competitors website
  • The competitor must be an online store, they may not have a retail location
  • The website can not be a discounter or auction website (ie; eBay, overstock, etc..)
  • The competitor must be an Authorized Retailer of the product in question
  • The Price Match Guarantee includes the item price and the shipping charges, it excludes sales tax

Customer Reviews

Based on 1 review
Love the UV - Finally!

I've been waiting for Waterdrop to come out with a UV sterilizer in their RO line up. Finally! Instructions are easy enough to follow, luckily I already had a hole in my counter from a previous RO system. We don't use nearly enough water to take advantage of the 800 gallons per day, but we like the better drain ratio, knowing we're not creating as much waste. No more worries for boil-water alerts thanks to the UV, that gives us the safety and confidence we were looking for.