---
product_id: 310638346
title: "Toto TWT173M 1.28 GPF Dual Flush In-Wall Toilet Tank Only with Copper Supply Line"
brand: "toto"
price: "¥316583"
currency: JPY
in_stock: true
category: "Toto"
url: https://www.desertcart.jp/products/310638346-toto-twt173m-1-28-gpf-dual-flush-in-wall-toilet
store_origin: JP
region: Japan
---

# 1.28/0.9 GPF dual flush Copper supply line included In-wall tank design Toto TWT173M 1.28 GPF Dual Flush In-Wall Toilet Tank Only with Copper Supply Line

**Brand:** toto
**Price:** ¥316583
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Toto TWT173M 1.28 GPF Dual Flush In-Wall Toilet Tank Only with Copper Supply Line by toto
- **How much does it cost?** ¥316583 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/310638346-toto-twt173m-1-28-gpf-dual-flush-in-wall-toilet)

## 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

- • **Effortless Upgrade:** Compatible with standard in-wall setups for a hassle-free, professional-grade bathroom refresh.
- • **Eco-Smart Dual Flush:** Choose between 0.9 or 1.28 gallons per flush to slash water bills and boost sustainability.
- • **Trusted Toto Quality:** Backed by a top-tier brand with a 4.1-star rating, combining reliability with cutting-edge plumbing tech.
- • **Durable Copper Supply Line:** Premium corrosion-resistant copper piping ensures long-lasting, leak-free performance.
- • **Sleek In-Wall Installation:** Maximize bathroom space with a discreet, wall-mounted tank system that blends seamlessly with modern interiors.

## Overview

The Toto TWT173M is a high-efficiency in-wall toilet tank featuring a dual flush system with 0.9 and 1.28 gallons per flush options, designed to conserve water without sacrificing performance. It includes a durable copper supply line for reliable installation and is crafted by Toto, a trusted leader in plumbing fixtures.

## Description

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

## Features

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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B084KQYNQY |
| Best Sellers Rank | #331,181 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #35 in Toilet Water Tanks |
| Brand | TOTO |
| Brand Name | TOTO |
| Customer Reviews | 4.1 out of 5 stars 10 Reviews |
| Included Components | Product Only |
| Installation Method | wall |
| Installation Type | wall |
| Item Type Name | Toilets and Bidets |
| Item Weight | 43 pounds |
| Manufacturer | TOTO |
| Manufacturer Part Number | WT173M |
| Material | Plastic |
| Material Type | Plastic |
| Model Number | WT173M |
| Number of Items | 1 |
| Seat Material | Plastic |
| Seat Material Type | Plastic |
| UPC | 739268348677 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** TOTO
- **Installation Type:** wall
- **Item Weight:** 43 Pounds
- **Material:** Plastic
- **Seat Material Type:** Plastic

## Images

![Toto 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)

## 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.jp/products/310638346-toto-twt173m-1-28-gpf-dual-flush-in-wall-toilet](https://www.desertcart.jp/products/310638346-toto-twt173m-1-28-gpf-dual-flush-in-wall-toilet)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-11-10*