---
product_id: 310638346
title: "TWT173M 1.28 GPF Dual Flush In-Wall Toilet Tank Only with Copper Supply Line"
brand: "toto"
price: "₨527431"
currency: LKR
in_stock: true
reviews_count: 1
category: "Toto"
url: https://www.desertcart.lk/products/310638346-twt173m-1-28-gpf-dual-flush-in-wall-toilet-tank
store_origin: LK
region: Sri Lanka
---

# Dual-Max flush: 0.9 or 1.28 GPF Copper supply line: durable & corrosion-resistant In-wall tank system: sleek built-in design TWT173M 1.28 GPF Dual Flush In-Wall Toilet Tank Only with Copper Supply Line

**Brand:** toto
**Price:** ₨527431
**Availability:** ✅ In Stock

## Summary

> 🚽 Flush Smarter, Live Greener — The Future of Bathroom Efficiency

## Quick Answers

- **What is this?** TWT173M 1.28 GPF Dual Flush In-Wall Toilet Tank Only with Copper Supply Line by toto
- **How much does it cost?** ₨527431 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/310638346-twt173m-1-28-gpf-dual-flush-in-wall-toilet-tank)

## Best For

- toto enthusiasts

## Why This Product

- Trusted toto brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Water-Wise Dual Flush:** Choose between 0.9 or 1.28 gallons per flush for ultimate water savings without sacrificing performance.
- • **Eco-Friendly Efficiency:** Meets high standards for water conservation, helping you reduce your environmental footprint.
- • **Premium Copper Supply Line:** Ensures long-lasting durability and corrosion resistance for worry-free plumbing.
- • **Upgrade-Ready Compatibility:** Designed to integrate with advanced Toto systems for a future-proof bathroom upgrade.
- • **Seamless In-Wall Installation:** Built-in tank design maximizes bathroom space and delivers a clean, modern aesthetic.

## Overview

The Toto TWT173M is a high-efficiency in-wall toilet tank featuring a Dual-Max flush system with 0.9 and 1.28 gallons per flush options. Its sleek built-in design saves space while the included copper supply line offers enhanced durability. Ideal for eco-conscious professionals seeking a modern, water-saving upgrade, this tank supports seamless integration with advanced Toto bathroom systems.

## Description

IN WALL TANK SYSTEM W/ COPPER PIPE - 1.28GPF & .9GPF FOR CCT

Review: Buyer Beware! - I have a toto in-wall carrier and wanted to add atoto washlet. Lots of issues! 1. No where in the instructions, for the washer or the tank does it tell you that you need their PROPRIETARY shut-off valve. After the plumbers messed around with it for several hours and a couple of trips to a specialty plumbing store with no luck, I called toto and was told of the mystery, necessary part. 2. Poor customer service as the rep was very condescending and making excuses for why it isn't in the kit or instructios. 3. The PROPRIETARY chrome shut-off valve in question is $160.00! Yes, because charging 3 times what everyone else charges for these systems isn't enough. There is absolutely no reason, other than to rip you off, does this part need to be proprietary.

## Features

- Dual-Max flush promotes water conservation with a 0.9 or 1.28 GPF option

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B084KQYNQY |
| Batteries Required? | No |
| Best Sellers Rank | #457,857 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #48 in Toilet Water Tanks |
| Capacity | 1.28 Gallons |
| Customer Reviews | 3.8 3.8 out of 5 stars (8) |
| Date First Available | February 6, 2020 |
| Fit Type | built-in |
| Included Components | Product Only |
| Installation Method | wall |
| Item Package Quantity | 1 |
| Item Weight | 43 pounds |
| Item model number | WT173M |
| Manufacturer | TOTO |
| OEM Part Number | WT173MA |
| Part Number | WT173M |
| Product Dimensions | 47.5 x 26.25 x 5.75 inches |
| Product Grade | Like New |
| Style | DuoFit |
| UPC | 739268348677 |
| Usage | Inside |

## Product Details

- **Brand:** TOTO
- **Exterior Finish:** Copper
- **Item Weight:** 43 Pounds
- **Item dimensions L x W x H:** 47.5 x 26.25 x 5.75 inches
- **Material:** Plastic

## Images

![TWT173M 1.28 GPF Dual Flush In-Wall Toilet Tank Only with Copper Supply Line - Image 1](https://m.media-amazon.com/images/I/61zGwO5etzL.jpg)

## Customer Reviews

### ⭐ Buyer Beware!
*by J***1 on January 24, 2025*

I have a toto in-wall carrier and wanted to add atoto washlet. Lots of issues! 1. No where in the instructions, for the washer or the tank does it tell you that you need their PROPRIETARY shut-off valve. After the plumbers messed around with it for several hours and a couple of trips to a specialty plumbing store with no luck, I called toto and was told of the mystery, necessary part. 2. Poor customer service as the rep was very condescending and making excuses for why it isn't in the kit or instructios. 3. The PROPRIETARY chrome shut-off valve in question is $160.00! Yes, because charging 3 times what everyone else charges for these systems isn't enough. There is absolutely no reason, other than to rip you off, does this part need to be proprietary.

## Frequently Bought Together

- Toto TWT173M 1.28 GPF Dual Flush In-Wall Toilet Tank Only with Copper Supply Line
- TOTO CT426CFG#01 Toilets, Cotton White
- TOTO YT920#WH Toilets and Bidets, White Matte

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**Shop now:** [https://www.desertcart.lk/products/310638346-twt173m-1-28-gpf-dual-flush-in-wall-toilet-tank](https://www.desertcart.lk/products/310638346-twt173m-1-28-gpf-dual-flush-in-wall-toilet-tank)

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-12*