---
product_id: 310638346
title: "TWT173M 1.28 GPF Dual Flush In-Wall Toilet Tank Only with Copper Supply Line"
brand: "toto"
price: "€ 1417.65"
currency: EUR
in_stock: true
reviews_count: 1
category: "Toto"
url: https://www.desertcart.gr/products/310638346-twt173m-1-28-gpf-dual-flush-in-wall-toilet-tank
store_origin: GR
region: Greece
---

# 1.28/0.9 GPF dual flush Durable copper supply line In-wall space-saving design TWT173M 1.28 GPF Dual Flush In-Wall Toilet Tank Only with Copper Supply Line

**Brand:** toto
**Price:** € 1417.65
**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?** € 1417.65 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/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

- • **Eco-Smart Dual Flush:** Choose between 0.9 or 1.28 gallons per flush to slash water bills and boost sustainability.
- • **Water-Wise Leadership:** Join the eco-conscious pros reducing water waste without sacrificing performance.
- • **Effortless Compatibility:** Designed to integrate seamlessly with modern Toto fixtures for a cohesive bathroom upgrade.
- • **Premium Copper Supply Line:** Enjoy corrosion-resistant, long-lasting plumbing reliability that outperforms standard materials.
- • **Sleek In-Wall Installation:** Maximize bathroom aesthetics and space with a discreet, built-in tank system.

## 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 compromising performance. Its space-saving built-in design pairs with a durable copper supply line for enhanced longevity and reliability, making it an ideal upgrade for modern, eco-conscious bathrooms.

## 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 | #405,718 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #42 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.gr/products/310638346-twt173m-1-28-gpf-dual-flush-in-wall-toilet-tank](https://www.desertcart.gr/products/310638346-twt173m-1-28-gpf-dual-flush-in-wall-toilet-tank)

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-02-01*