Have a question about TOTO ST446EMNA AQUIA IV 15 1/2 INCH DUAL FLUSH 1.28 AND 0.9 GPF TOILET TANK ONLY WITH WASHLET+ AUTO FLUSH COMPATIBILITY? We are here to help - ask us anything!
Have a technical question? Delivery question or any questions at all, use the chat box to the left and ask away!
If you prefer to speak to us over the phone, call us! 800-634-0410
We do our best to provide accurate answers here, but sometimes we may lack details or context and mistakes can happen. For the most precise information, please call us directly at 1-800-634-0410. We're always happy to help!
Toto ST446EMNA Aquia IV 15 1/2 Inch Dual Flush 1.28 and 0.9 GPF Toilet Tank Only with Washlet+ Auto Flush Compatibility
The Toto Aquia IV Dual Flush 1.28 and 0.9 GPF Auto Flush Compatible Toilet Tank is designed for use with the Aquia IV dual flush bowl. The Aquia IV tank includes a tank to bowl gasket, tank to bowl hardware, and toilet bolt caps. The Aquia IV tank features Toto's Dual-Max dual flush option, allowing you to proactively conserve water usage. The chrome center-mounted push button that sits atop the tank allows you to choose between a 0.9 GPF rinse or 1.28 GPF for tougher jobs. This version of the Aquia tank offers Toto T40 WASHLET+ and Auto Flush compatibility for when you are ready to upgrade to a hands-free flush system with electronic bidet seat. The Aquia IV tank meets the standards for EPA Water Sense, and California’s CEC and CalGreen requirements. Additional items needed for installation and use must be purchased separately: toilet bowl, wax ring, toilet mounting bolts, and water supply lines.
Features:
Aquia IV toilet tank for use with Aquia IV toilet bowl
Dual flush system allows you to proactively conserve water - Select 1.28 GPF or 0.9 GPF
Lid-top chrome dual flush push button
Auto Flush compatible
Water Sense, CalGreen, and CEC compliant
Included parts: tank to bowl gasket, tank to bowl hardware, and toilet bolt caps
Purchased separately: Aquia IV bowl, wax ring, toilet mounting bolts, water supply lines, and optional WASHLET+ with Auto Flush kit
Elevate Everyday Rituals with TOTO Bath Innovation
Transform your sanctuary with Toto Bath collections celebrated for precision engineering, eco?smart technology, and timeless design. Begin with a water?saving Toto Bath Faucet that pairs effortlessly with a silky?smooth Toto Undermount Bath Sink. Add sculptural relaxation through a deep Toto Soaking Tub or an elegant Toto Freestanding Bathtub. Moreover, invigorate mornings with a tailored spa experience using Shower Toto components such as Toto Shower Heads and Toto Hand Showers. Because every detail matters, integrate Toto Seats on advanced Toto Toilets to enjoy seamless comfort and powerful, quiet flushing. Meanwhile, thoughtfully placed Toto Bath Accessories keep everyday essentials organized while reflecting cohesive style. Therefore, each fixture works in harmony to deliver unmatched hygiene, water efficiency, and refined aesthetics. Finally, maintain peak performance with genuine Toto Parts designed for long?term reliability.
Explore the Complete TOTO Collection for Total Harmony
Select sleek Toto Bath Faucets for modern vanities. Select roomy Toto Bath Tubs when spa?level soaking tops your wish list. Select durable Toto Bath Sinks to anchor powder rooms with grace. Additionally, coordinate luxury finishes by adding Toto Shower Hoses, Toto Shower Arms, or rehabilitative Toto Body Spray jets. Next, polish the bathscape with Toto Tub Fillers and matching Toto Tub Spouts that deliver laminar flow without splashing. Furthermore, commercial spaces maintain pristine standards using durable Toto Flush Valves and compatible Toto Tank Lids. Consequently, every TOTO category— from indulgent Toto Tubs to minimalist accessories— merges ergonomic comfort, advanced cleansing, and Japanese craftsmanship. Invest with confidence, knowing decades of research at TOTO USA guide each innovation toward healthier, more sustainable living.
We purchased a set for a shower enclosure with fears of being unable to install it. It took us some time to drill the holes through the porcelain tiles and adjust the vertical U extrusions on both walls for the fixed panels. Hanging the door was a bit difficult, especially adjusting the height and the opening. But overall we are very happy with the purchase. The set looks great and we saved a few dollars.
- Hflorez21
Great Sink
My family and I just completed a complete kitchen renovation and I got some great new things, but I have to say that this sink may be my favorite (as well as my husband and son's). It's deep, but not too deep. It's very roomy and stylish. I would highly recommend it to anyone who wants a larger stainless steel sink. I can fit large pans in it, multiple plates, glasses, etc. I can even polish large silver items in it.
- Amy M.
Fast Shipping & Friendly Service
Just got my Toto Neorest 550h. Amazing toilet. The prices from Kitchen & Bath Authority were unbeatable and considerably less than I was quoted elsewhere.
- FrankK-64131
Customer service is amazing!
I've gotten great service and quality from kbauthority for several years now, always friendly customer sales people and fast delivery
- Miked998
Loved it
Shopping online with KBAuthority was nothing but an incredible experience. I purchased a Brizo kitchen/shower system for my home and I wasn’t too sure about what I needed to purchase. So I spoke to a sales representative named Joe and he took me throughout the entire shopping process. He explained EVERYTHING from what I need to buy, why I need to buy, and how much it cost. I got everything in about 3 weeks (as promised). Since then, everything has been installed and the results are just outstanding. I don’t have any complaints and would definitely shop again.
- James Penso
Best price on delta products fast delivery !
Me and my husband ordered Delta products for two of the bathroom remodels that we are doing ,products arrived in about a week packaged really well and I got the best price possible on the web so very very happy!!! definitely recommend this company to others for any home remodel project
- Anne
Great Service, quick delivery time and as described.
We ordered two shower doors both came in about a week, the driver allowed us to inspect the products which was in good condition. Overall good shopping experience would recommend this company.
- RRWI
Great place
Got exactly what i needed and came in real fast love this place . Never had a problem on any order.
- Bubba1231
Wonderful Shopping Experience!
Can't say enough good things about this company. Wish every website was this organized. I wanted to replace our old, discolored door knocker. Went to the store, purchased the only one they had only to find out when I got home with it the CTC did not match. Never even knew there was a difference; thinking since you have to drill all the way through the door, this measurement would be standard. So, thank goodness for the internet! This site is so easy to use. Just select the CTC of your current knocker, if you are replacing one like I was, click and your choices appear! The knocker is absolutely gorgeous! Thank you KBAuthority.com!!
- nan_sky_76
Just What I Needed
I was looking for a 12" towel bar and all the stores on town only had 18" bars. I went online and found just what I needed at KBAuthority.com, the towel bar arrived through the mail, in less than 1 week, and is exactly what I was looking for.
- Lindakweed
Robern AIO mirrors
We were looking for Robern mirrors. KB Authority had them for half price. Ordering was easy and delivery was on time, within 2 weeks. We spoke with customer service several times to verify the order was moving along as the ability to follow the progress on line was somewhat limited. They were always very helpful.
- casbls
2nd satisfied purchase from KBA
some time ago I ordered a shower door and asked for help from cust service which worked out well.I ordered a bath/shower door last week and it arrived super fast and well packaged.
I definitely have KBA on my list for future purchases.
- try-to-be-handy
Instant Hot, Instant service
Our Franke instant hot gave out on us after 16 years and we had to get a new one. Looked all over for the one we wanted and found it on the KBA website for the best price. Not only was the price right but the service and quick delivery made the difference. I will keep them on my "Favorites" for any future needs.
- Judy
Great price and service
Excellent customer service, quick order and receiving as promised.
- ArisM
Price - Selection - SERVICE
I think I looked at every stainless steel prep faucet and pot filler on earth. No, seriously. Ended up going with KBA because they offered exactly what I wanted at the best price. When there was an issue with the mfg (Hans Grohe), I called KBA. They were super helpful, explained exactly what was going on, and offered me options. When you build, you spend countless hours sourcing materials and it can make you crazy. KBA was a pleasure to deal with.
- Sheri_lynchax
great price and service
I initially had difficulty actually placing my order, however by using the chat, my issues were quickly resolved. I always do a lot of research on price and shipping before buying. KBAuthority was best. I was very impressed on the packaging. There was no way my sink was going to be damaged by mishandling.
- rpmartinsen
Excellent service on sink purchase.
Great selection with excellent prices. Ordered a Franke sink with inserts. Delivered in less than 2 weeks. Happy with purchase. No complaints.
- sbteleky
Lowest prices on Hansgrohe
I ordered $1000 worth of bath fixtures from KB. Loved the interactive chat to confirm i ordered all the right parts. Post-sales communication was so-so - I ended up having to call to confirm the ship date - but probably slightly better than expected given prices 5% or more below competitors'.
- bathbuyer
Best Price on Delta Shower Fixtures
Searched and found this to be best price on Delta venetian bronze shower set for bathroom remodel, even with modest handling fee (which was probably less than the actual shipping cost). No issues with packaging or shipping time.
- pas_duh_2
Great Prices and Customer Service
Ordered a bunch of Hansgrohe stuff for our new home. Their prices were very competitive. We made a few changes throughout the process and customer service was very accommodating.
- stjules
Great Communication - Best prices - Quick delivery
I ordered a vanity, sink, faucet and other accessories. They had the best prices of any on line seller and no sales tax on the order due to out of state shipping. I estimate I save at least $300 by using KBAuthority. My only issue was with UPS - The weight of the contents was too much for the contents and the box was split open upon delivery - no damage to the contents but a concern.
- kathbla
Fast Delivery
Delivery was fast. I had also sent an email with a question and got a response back the same day. I had forgot to include my coupon code and asked if it could still be used. The representative applied my coupon and adjusted the price. Overall very good shopping experience Thank you!
- Gelenj
Second time ordering, same great service
This was my second order with this company, everything arrived on time and packaged well! I have another bathroom remodel and will use kauthority.com for the third time.
- HQ
Believer
I hesitated to make such a large purchase (shower doors) online, but given the same product was available at a handful of retailers I trust for MUCH MORE, I took a breath and trusted this would work out. Being protected by Google helped me make the leap. I'm glad I did. Arrived quickly, all parts intact, and the final product looks perfect in my bathroom. I'm a believer in KBAuthority, and now a returning customer.
- ChezD
Happy Customer
I'm thrilled with my purchase from KBAuthority.com! The product quality is exceptional, surpassing my expectations. Their customer support was prompt and helpful, ensuring a smooth transaction. Plus, the shipping was incredibly fast, and my order arrived in perfect condition. Highly recommend for a reliable and satisfying shopping experience!
- Jannice Woother
Great Store
KBAuthority.com is a game-changer! They offer top-notch products that have truly enhanced my home’s aesthetic. The customer service team was attentive and answered all my questions with ease. I was impressed with the quick shipping, and everything arrived safely. Definitely my go-to for home fixtures!
- TJ
Great!
Shopping at KBAuthority.com was a breeze! They provide high-quality products, and their extensive range made it easy to find exactly what I needed. The customer support was outstanding, guiding me through my purchase. The fast and reliable shipping was the cherry on top. Will shop again!
- Tom M
Piece of Cake!
Easy to order, sales customer support is fantastic... Joe really helped me answer my questions
- Dacid D.
Great Site
I ordered a 72x36 shower base. Ordering was easy. They even confirmed that it was actually me since it was being shipped to a different address. They called me to pick a delivery date. It was delivered on a pallet, was well packed, and in perfect condition.
I haven't installed it since it's a new construction.
I would order from them again.
- Lenore H
Faster then anticipated
When I tried to order the 2 vanities off the internet, the site said to contact them due to low quantity. Did so, was told they were temporarily out of stock would possibly be 2 to 3 weeks for them to receive and another week for me to get them. Placed the order over the phone with the rep (didn't have to have them asap). Was surprised when they were at my door within a week.
- Edward W
Fast!
Absolutely fantastic. Item was on back order, but I guess you found one and promptly shipped it. Really happy I found you online.
- Greg S.
First Time Buyer
Wasn't sure about KBAuthority, a first time purchase. So glad I took a chance ..Everything went perfect and look forward to future purchases!
- Paul S.
Tips & Ideas
How to Select the Right Bathroom Faucets For Your Home
You use your bathroom faucets every day, but chances are, you don’t give these fixtures a lot of thought. In reality, however, they can have a significant impact on the appearance and functionality of your bathroom. When planning for a full-scale...
Ask These Questions Before Starting Bathroom Renovations
Bathroom renovations are one of the most common home improvement projects, but they are also among the most complex and costly. While there is no denying that quality remodeling can greatly increase the bathroom’s style and functionality...
To say that COVID-19 (or the coronavirus) has disrupted our normal routines seems like a major understatement. From the cancellation of major sporting events to school closures across the country, many are finding themselves forced to make significant ...
Give Your Bathroom a Boost With the Latest TOTO Washlet!
When discussing ways to improve your bathroom, most homeowners focus on areas like the shower enclosure or the bathroom vanity. While upgrading these features can certainly go a long way in improving the aesthetics and functionality of this area, you c...
We’ve covered a lot of bathroom remodeling do’s on our blog, but to ensure that you get the results you want from your remodel, it can be just as important to be aware of and understand the things you shouldn’t do. With plumbing fixtures...
How the Toto Neorest Will Change Your Bathroom Experience
When it comes to redesigning your bathroom, the cabinets, countertops, and flooring typically get most of the attention. Despite how much use it gets every day, however, the toilet is usually an afterthought.
If you want to give your bathroom a truly luxurious upgrade, you can’t go wrong with the Toto Nearest Nx1 MS900CUMFG#01. This ultra high-efficiency dual-flush toilet is sure to transform your bathroom experience for the better. Here’s why...
How to Remodel Your Bathroom Without Breaking the Bank
Bathroom remodeling is one of the best ways to increase your property value and improve your living space. At the same time, however, these home improvement renovations tend to be among the more expensive upgrades you can make for your house. The cost ...
