Toto Aquia IV Toilet Tank...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$248.79
Toto Aquia IV Toilet Tank

Toto Aquia IV Toilet Tank

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Model: ST436EMNA#01
From the Aquia IV Collection
$248.79
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$248.79
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The TOTO Connelly Dual-Max, Dual Flush 1.28 and 0.9 GPF Toilet Tank with Right-Hand Trip Lever is designed for use with the Connelly dual flush bowl. The Connelly tank includes a tank to bowl gasket, tank to bowl hardware, and toilet bolt caps. The Connelly tank features TOTO's Dual-Max dual flush option, allowing you to proactively conserve water usage. The right-hand chrome trip lever allows you to choose between a 0.9 GPF rinse or 1.28 GPF for tougher jobs. The Connelly tank meets the standards for EPA WaterSense, 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, water supply lines, and toilet seat. The Connelly ST494M tank can be used on the CT494CEFG and CT494CEF bowls.

Features

  • Connelly toilet tank for use with Connelly toilet bowl
  • Dual-Max flushing system allows you to proactively conserve water - Select 1.28 GPF or 0.9 GPF
  • Right-hand chrome trip lever
  • WaterSense, CALGreen, and CEC compliant
  • Included parts: tank to bowl gasket, tank to bowl hardware, and toilet bolt caps
  • Purchased separately: Connelly bowl, wax ring, toilet mounting bolts, water supply lines, and toilet seat
  • compatible with the CT494CEFG and CT494CEF bowls
Model No Width Height GPF
ST446EMNA#12 15.5625 13.125 0.9|1.28
ST446EMNA#03 15.5625 13.125 0.9|1.28
ST446EMNA#11 15.5625 13.125 0.9|1.28
ST446EMNA#01 15.5625 13.125 0.9|1.28
ST436EMNA#01 16.5 15.25 1.28|0.9
ST436EMNR#01 16.5 15.25 1.28|0.9
ST448EMNA#01 19 13.8125 0.9|1.28
ST446EMNA#51 15.5625 13.125 0.9|1.28

Manufacturer Resources

CST446-Installation-Sheet

Product Specs

Collection:
Aquia IV
ADA Compliant:
Yes
Flush lever Location:
Left
Product Type:
Tanks
WaterSense:
Yes
Product Group:
Washroom/Bath
Product Subgroup:
Toilet Tank
Product Length:
6.375
Product Height:
15.25
Product Weight:
29
Product Width:
16.5
Department:
Plumbing

TOTO ST436EMNA#01 – Frequently Asked Questions

1) Is the TOTO Aquia IV toilet tank sold with a bowl, or do I have to buy the bowl separately?
Tank only. The Aquia IV tank ships with the tank-to-bowl gasket, tank-to-bowl hardware and toilet bolt caps, so the tank-to-bowl joint is covered. Everything else for a working install comes separately: the bowl, wax ring, toilet mounting (closet) bolts, water supply line and seat. If you're replacing a cracked tank on an existing bowl, that's exactly what this is for. If you're doing a new install, order the matching bowl and the rough-in parts on the same order so the truck doesn't come twice.
2) Does the Aquia IV tank come with the flush lever on the left or right side?
Both, plus a push button, and you pick one when you order. ST436EMNA#01 is the left-hand lever, ST436EMNR#01 is the right-hand lever, and ST446EMNA#01 is the push-button top-mount version. This matters more than people expect in a retrofit: if the tank sits in an alcove or beside a vanity wall, a lever on the wrong side is hard to reach and can rub the finished surface. Match the side of the tank you can actually get a hand to.
3) What are the dimensions of the TOTO Aquia IV ST436 tank, and will it clear a window sill or a shelf behind the toilet?
The ST436 tank measures 16.5 wide, 15.25 high and 6.375 deep in inches. The 15.25 inch height is the number that decides sill and shelf clearance, and you need lid removal room above that. The push-button ST446 tanks are shorter and narrower at 15.5625 by 13.125 inches, and the transitional ST448 is wider and lower at 19 by 13.8125 inches, so if headroom above the tank is tight, the ST446 or ST448 profile buys you close to two inches.
4) Can I use the Aquia IV tank to replace a leaking tank without replacing the whole toilet?
That's the normal use for it. The tank is sold on its own with the gasket, bolt hardware and caps needed to remount it, so a cracked or leaking tank on an otherwise sound bowl is a tank swap rather than a full fixture replacement. Two things to confirm before you order: the bowl has to be the matching Aquia IV bowl, since dual flush tanks are not interchangeable across bowl models, and the color code on the bowl needs to match the tank you pick. You'll also want a new supply line while the water is off.
5) How much water does the TOTO Aquia IV dual flush tank use per flush?
Two volumes: 0.9 gallons for liquid waste and 1.28 gallons for solids, selected at the lever or button. Both settings sit at or under the 1.28 gpf federal maximum, and the tank carries a WaterSense designation, which is what most utility rebate programs and green building checklists look for.
6) Should I order the traditional or the transitional Aquia IV tank?
It's a styling choice that also changes the footprint. The traditional tank in the ST436 form is 16.5 by 15.25 inches, taller and narrower; the transitional ST448EMNA#01 runs 19 inches wide by 13.8125 high, lower and broader. Both flush 0.9 and 1.28 gpf. Pick the one that matches the bowl profile you are pairing it with, and on a multi-unit standardization job pick one and stay on it so your spare tanks and lids interchange between apartments.
7) What colors does the TOTO Aquia IV tank come in besides white?
Five finishes: Cotton White (#01), Bone (#03), Colonial White (#11), Sedona Beige (#12) and Ebony (#51). The suffix on the model number is the color code, so ST446EMNA#51 is the Ebony push-button tank. If you're replacing a tank on an existing TOTO bowl, match the color code on the bowl rather than the color name, since Cotton White and Colonial White are two distinct shades and read wrong side by side.
8) Does the Aquia IV toilet tank meet ADA requirements for a commercial restroom?
The Aquia IV tank is listed as ADA compliant. On the flush control specifically, the lever and push-button versions are both operable without tight grasping or twisting, which is the part of the requirement the tank itself controls. The rest of an ADA compliant water closet, seat height and clearances, is set by the bowl and the layout, so specify the bowl accordingly.
9) How heavy is a TOTO Aquia IV tank, and can one person set it on the bowl?
29 pounds. That's a one-person lift for most installers, but it's awkward vitreous china at arm's length over a bowl, and a dropped tank cracks the bowl underneath it. Set the tank-to-bowl gasket and bolts before you lift, and snap the bolt caps on last.
How fast can I get the TOTO ST436EMNA#01 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the TOTO ST436EMNA#01 come with a warranty?
Absolutely. The TOTO ST436EMNA#01 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the TOTO ST436EMNA#01?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the TOTO ST436EMNA#01 from ZenSupply?
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