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Internet # 205088518

Model # SPOSITIVE-101

SinkPositive GreenFlow Toilet Tank Sink in Crisp White

$83.11
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  • Uses clean supply line water for gentle handwashing
  • Sink water drains into any connected toilet tank
  • Suitable for small bathrooms or restrooms with limited space

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Return this item within 90 days of purchase.

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Product Details

About This Product

In a tight space, you need modern solutions to maximize flexibility. The SinkPositive GreenFlow Toilet Tank Sink is the perfect space-saving solution for small bathrooms, tiny homes, RVs, and the eco-conscious. This sink replaces your toilet tank cover and uses the tank's refilling operation to pump fresh water to the sink faucet - draining the used water into the toilet tank for flushing. Our lifetime warranty guarantees the durability of this sink for as long as you own it.

Highlights

  • Dimensions: 17 in. x 9 in.
  • Perfect for small bathrooms, tiny homes, RVs, and eco-conscious homes
  • Replaces existing toilet tank cover
  • Always pumps clean water through the faucet
  • Recycles used water from the sink into the toilet tank for flushing
  • Protected by our lifetime warranty
  • Click here to learn more about Eco Options and Water Conservation
  • Return Policy

Product Information

Internet # 205088518

Model # SPOSITIVE-101

Specifications

Dimensions

Product Depth (in.)

9 in

Product Width (in.)

18 in

Details

Color Family

White

Color/Finish

Crisp White

Commercial / Residential

Residential

Material

Acrylonitrile Butadiene Styrene (ABS)

Models used with

Various

Product Weight (lb.)

3 lb

Returnable

90-Day

Style

Minimalist, Modern

Warranty / Certifications

Manufacturer Warranty

Lifetime Warranty - Everyday Promise

Questions & Answers

Where does the water come from
ByApr 27, 2025
1 Answer | 
Answer This Question

Hello! The fresh water line input for the toilet connects to the sink faucet. When the toilet is flushed the water is sent to the faucet and the sink drain fills the toilet bowl. It shuts off when the bowl is full. If you have any additional questions, we'd be happy to help! Reach out to our customer service team at customerservice@sinkology.com

By|Apr 28, 2025
    0/0


    Can I brush my teeth in an over the toilet sink?
    ByMar 2, 2025
    2 Answers | 
    Answer This Question

    Yes, absolutely! The water feeding it is the same as what comes out any other sink, and what you spit out will just flush away.

    By|Mar 3, 2025
      0/0

      Yes! You can brush your teeth in and over the sink! The fresh water line input for the toilet connects to the sink faucet. When the toilet is flushed the water is sent to the faucet and the sink drain fills the toilet bowl. It shuts off when the bowl is full. If you have any additional questions, we'd be happy to help! Reach out to our customer service team at customerservice@sinkology.com

      By|Mar 5, 2025
        0/0


        Does a faucet come with the sink or is that a separate purchase?
        ByMar 1, 2025
        1 Answer | 
        Answer This Question

        Yes! The faucet comes with the sink! If you have any additional questions, we'd be happy to help! Reach out to our customer service team at customerservice@sinkology.com

        By|Mar 5, 2025
          0/0


          Can I change the faucet or so I have to use the one that comes with the sink
          ByFeb 24, 2025
          1 Answer | 
          Answer This Question

          Hello! The faucet that comes with the sink is built into the sink, so it would not be able to be changed. Let us know if you have any additional questions!

          By|Feb 24, 2025
            0/0


            Why are there so many wrong answers to the questions, especially from the "TEAM"? This product is not Code compliant as a bathroom sink. The water that flows from the fill valve (ballcock) does not enter the tank. It goes down the overflow to the bowl.
            ByFeb 1, 2025
            1 Answer | 
            Answer This Question

            Thank you for reaching out! You are correct! The water that flows from the fill valve goes down the overflow to the bowl. Thank you for pointing that out. If there's anything we can help you with regarding the SinkPositive GreenFlow Toilet Tank we'd be happy to help! Please reach out to our customer service team at customerservice@sinkology.com

            By|Feb 15, 2025
              0/0


              Is this compatible with a Glacier Bay power flush single flush toilet?
              ByDec 5, 2024
              1 Answer | 
              Answer This Question

              Hello! The best thing about the SinkPositive GreenFlow Toilet Tank Sink is that the length of the sink is adjustable and can fit many different brands of toilet tanks. The specifications for this sink are: an adjustable length (side to side) of 16.5” - 22.5”, width of (front to back) 8”, and height of 9.25”. We would recommend determining the size of the toilet tank that you have or desire to have and go from there!

              By|May 3, 2025
                0/0

                (1)

                Will this fit on a 8x16 tank
                ByNov 15, 2024
                1 Answer | 
                Answer This Question

                Hello! The length of the SinkPositive Toilet Tank Sink is adjustable from 16.5" to 22.5". This sink may be slightly bigger than your tank - it should fit, but there's a chance it may move minimally from side to side with the extra half an inch. The width should fit perfectly as the width of the sink is 8".

                By|Nov 15, 2024
                  0/0


                  Does this work on Toto toilets?
                  ByNov 7, 2024
                  1 Answer | 
                  Answer This Question

                  Hello! Thank you for reaching out! The GreenFlow Toilet Tank Sink is adjustable in length and can fit a toilet tank that is 16.5" long to 22.5" long. If you would like to talk with our Customer Service team regarding the specific toilet you are looking at, we'd be happy to help talk through your specific situation and installation tips. Please contact customerservice@sinkology.com for further help.

                  By|Nov 12, 2024
                    0/0


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                    Customer Reviews

                    4.1 out of 5

                    • 4.1 out of 185 reviews
                    • 82% recommend this product
                    What Customers Say
                    Summarized by generative AI from text of customer reviews

                    Customers say the product is a practical solution for adding a sink to tight spaces, particularly in half baths or small toilet rooms. Many appreciate its ease of installation and space-saving design, although some experienced challenges with fit and stability. The quality of materials received mixed feedback, with some noting it felt lightweight or made of plastic rather than porcelain. Overall, it effectively addresses the need for handwashing in areas without traditional sinks, though some users suggest improvements in design and instructions.

                    Filter by:
                    Showing 1-10 of 185 reviews
                    for children's potty in tiny "closet" retrofit.
                    Installed this Sink Positive on a new HD Glacier Bay toilet & tank. For a home DIY in a tiny closet that turned into a kids potty room. Definitely neat and space saving. Useful for a kids sink. Only cold water (same as toilet line). Operates "on" when the toilet is flushed. No shut off feature. The Sink Positive is adjustable, for several tank styles, but I found it wobbles loosely, so I put some beads of caulk to glue the top sink to the toilet tank. ...
                    by
                      • Recommended
                      1 found this review helpful
                      Best value of the options out there
                      I have a 15 inch wide toilet tank, but opted for this product rather than one built for smaller tanks because it has several advantages: deeper sink, aerator faucet, and most importantly, the drain doesn't just drip water into the tank, it directs it into the overflow pipe so that none of the soapy water enters the tank, only the bowl. Unfortunately, I could not use the adjusting slider piece because my tank was just a little too deep front to back for the lid to fit with the narrower measurement caused by inserting the slider piece. I dealt with omitting it by leveling the sink with a piece of weather stripping foam set on the tank rim. So the result is good, if a little off center. Maybe not the best installation, but it gets the job done and the deeper sink & aerator faucet means no splashing. Pretty happy with this, as I have been told several times that adding a sink to this super narrow toilet room would require some very costly plumbing. This addresses the hand washing issue and is something I could install myself. Installation was simple and worked the first time.
                      by
                      • Verified Purchase
                      An inexpensive upgrade for a quarter bath
                      My quarter bath is now a half bath! I wish I had discovered this product years ago.
                      by
                      • Verified Purchase
                      • Recommended
                      Arrived on time.Well packaged. At first it seemed a bit flimsy and when put in didn't quite clic...
                      Arrived on time.Well packaged. At first it seemed a bit flimsy and when put in didn't quite click in but a little pressure and it set in place. Quite the talk of the town. Very very happy with it.
                      by
                      • Verified Purchase
                      • Recommended
                      6 found this review helpful
                      I have a toilet in a really small space off of my kitchen. For years I've grappled with costly re...
                      I have a toilet in a really small space off of my kitchen. For years I've grappled with costly renovations to extend the walls to make room for a sink. Along comes SinkPositive. A godsend, and I love it! It's convenient, very easy to install, and provides more than enough running water to wash your hands. In addition there's a nice lip to sit a soap bottle atop. Yay! It would be awesome if it was sturdier but, okay.
                      by
                      • Verified Purchase
                      • Recommended
                      5 found this review helpful
                      Love this little plastic sink. Perfect for my pool house that only has space for a toilet. And ...
                      Love this little plastic sink. Perfect for my pool house that only has space for a toilet. And we are saving water, bonus!
                      by
                      • Verified Purchase
                      • Recommended
                      2 found this review helpful
                      I love this little sink it's perfect for my basement bathroom (5×7) definitely would recommend.
                      I love this little sink it's perfect for my basement bathroom (5×7) definitely would recommend.
                      by
                      • Verified Purchase
                      • Recommended
                      3 found this review helpful
                      We have now had this product for over two weeks. We are very pleased with it. It solved the probl...
                      We have now had this product for over two weeks. We are very pleased with it. It solved the problem of having the toilet and sink separated into different areas in our master bathroom. Despite some negative review about the quality of the sink, we were impressed with how well it was made. I was actually expecting the thickness of the sink to be less than it actually was. It was easy to install and we use it every day.
                      by
                      • Verified Purchase
                      • Recommended
                      4 found this review helpful
                      Happy with the toilet tank retrofit sink/faucet
                      As advertised this took very little time to install and it works great. I thought it was a little pricey until I looked at DIY options and by the time you get done buying all the parts, drilling etc. it wouldn't save me a thing. So get this if you want easy with no headaches.
                      by
                      • DIY
                      • Verified Purchase
                      • Recommended
                      7 found this review helpful
                      Absolutely Love This
                      I absolutely love this sink. It does everything I wanted it to do. My only problem is with the 'feel/look' of it. It is light weight plastic and makes me wonder a little how sturdy it is. Over all we love it and it is a great conversation piece. It comes on 2-3 seconds after the toilet is flushed giving you plenty of time to lower the seat and get soap on your hands. So far we have been using it about 6 weeks and don't have a problem with splashing water on the walls and did not have to put up a backing to protect the walls. The soap sits on the side of the sink and the towel hangs beside the sink. Only when the grandkids come and use a LOT of soap do I notice the cloudy soapy look in the bowl water; so for now the grandkids are always remembering to wash their hand after a trip to the bathroom. It was installed very quickly and without special tools and worked the first time tried!
                      by
                      • DIY
                      • Verified Purchase
                      • Recommended
                      20 found this review helpful
                      Showing 1-10 of 185 reviews