---
product_id: 4494098
title: "American Standard 738921-100.0070A Selectronic 3 in. Flush Valve Assembly Kit With Flapper for 4021 Toilet Tank, White"
brand: "american standard"
price: "₨888"
currency: SCR
in_stock: true
reviews_count: 8
url: https://www.desertcart.sc/products/4494098-american-standard-738921-100-0070a-selectronic-3-in-flush-valve
store_origin: SC
region: Seychelles
---

# Easy installation kit 3-inch flush valve size Durable plastic & rubber build American Standard 738921-100.0070A Selectronic 3 in. Flush Valve Assembly Kit With Flapper for 4021 Toilet Tank, White

**Brand:** american standard
**Price:** ₨888
**Availability:** ✅ In Stock

## Summary

> 🚽 Upgrade your flush game with precision and power!

## Quick Answers

- **What is this?** American Standard 738921-100.0070A Selectronic 3 in. Flush Valve Assembly Kit With Flapper for 4021 Toilet Tank, White by american standard
- **How much does it cost?** ₨888 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/4494098-american-standard-738921-100-0070a-selectronic-3-in-flush-valve)

## Best For

- american standard enthusiasts

## Why This Product

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

## Key Features

- • **Durable Construction:** Built from high-quality plastic and rubber for long-lasting performance.
- • **Seamless Compatibility:** Specifically designed for American Standard Cadet 3 toilets—perfect fit guaranteed.
- • **Effortless Installation:** Get your toilet back in action quickly with a user-friendly assembly kit.
- • **Powerful 3-Inch Flush Valve:** Maximize flush efficiency with precision engineering.
- • **Certified Quality & Reliability:** Meets ASTM, UL, and WaterSense standards for trusted performance.

## Overview

The American Standard 738921-100.0070A Selectronic 3-inch Flush Valve Assembly Kit is a durable, easy-to-install replacement part designed exclusively for Cadet 3 toilets. Engineered with high-quality plastic and rubber, it ensures powerful flushing performance while meeting ASTM, UL, and WaterSense certifications. Backed by a 1-year limited warranty, this flush valve kit combines reliability with seamless compatibility to keep your bathroom running smoothly.

## Description

Product Description               Selectronic 3-in. Flush Valve Assembly with Flapper for 4021 Toilet Tank                  From the Manufacturer               Durable, reliable, quality engineering and construction. American Standard products are designed for your busy lifestyle. Parts, hardware, and components are engineered to enhance the usage of your American Standard products. About American Standard Brands - Great performance and great looks meet in our complete line of fixtures and faucets for bath and kitchen.  Performance and reliability.  Coordinated collections.  Ingenious features. American Standard is Style that Works Better everyday.

## Features

- To be installed in American Standard Cadet 3 toilets-check actual toilet model repair part information for compatibility
- Provides powerful flush
- Easy to install
- Durable construction

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Plastic |
| Brand | AMERICAN STANDARD |
| Item dimensions L x W x H | 4.5 x 5.5 x 8.7 inches |
| Exterior Finish | Plastic,Rubber |
| Inlet Connection Size | 3 Inches |
| Inlet Connection Type | Barb |
| Outlet Connection Type | Barb |
| Number of Ports | 2 |
| Outlet Connection Size | 3 Inches |
| Specification Met | ASTM, UL, WaterSense |
| Global Trade Identification Number | 00012611401299 |
| Manufacturer | AMMM9 |
| UPC | 012611401299 |
| Part Number | 738921-100.0070A |
| Item Weight | 8.8 ounces |
| Product Dimensions | 4.5 x 5.5 x 8.7 inches |
| Item model number | 738921-100.0070A |
| Is Discontinued By Manufacturer | No |
| Size | 4.5 x 5.5 x 8.7 inches |
| Color | White |
| Finish | White |
| Item Package Quantity | 1 |
| Included Components | flush valve assembly |
| Batteries Included? | No |
| Batteries Required? | No |
| Warranty Description | “*1 year Limited warranty from date of purchase” |

## Product Details

- **Material:** Plastic
- **Brand:** AMERICAN STANDARD
- **Item dimensions L x W x H:** 4.5 x 5.5 x 8.7 inches
- **Exterior Finish:** Plastic,Rubber
- **Inlet Connection Size:** 3 Inches
- **Inlet Connection Type:** Barb
- **Outlet Connection Type:** Barb
- **Number of Ports:** 2
- **Outlet Connection Size:** 3 Inches
- **Specification Met:** ASTM, UL, WaterSense

## Images

![American Standard 738921-100.0070A Selectronic 3 in. Flush Valve Assembly Kit With Flapper for 4021 Toilet Tank, White - Image 1](https://m.media-amazon.com/images/I/51sqMd3ykkL.jpg)

## Questions & Answers

**Q: will this fit a 4112 tank ?**
A: Amazon Customer, this will not work correctly. The correct part number will 738138-0070A. Sincerely, your American Standard Consumer Connections Team.

**Q: Will this fit an American Standard Eljer 4021 toilet?**
A: Yes, this flush valve with fit in the Eljer 4021 tank. Sincerely, Your American Standard Consumer Connection Team

**Q: Will this fit 2037 American standard**
A: No, the 2037 Lexington toilet would use the 738109-0070A flush valve.  It is no longer available directly from American Standard.  Your American Standard Consumer Connections Team.

**Q: Will this fit an American Standard F-4049 tank**
A: No, it is not compatible with the American Standard tank number F-4049.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Flushes like new
*by R***Y on December 29, 2024*

Replaced with aftermarket because original is not offered in stores. Flushed ok but not like it used to. Found it on Amazon. Works great and original part.

### ⭐⭐⭐⭐⭐ Repair American Standard Cadet 3 commode losing water
*by K***0 on August 10, 2016*

I have an American Standard Cadet 3 commode. The past month or so it has been slowly losing water between flushes. The water level will drop about an inch then it will refill. Since there was no water on the floor I determined that it must be the flush valve seal. I checked Home Depot and Lowes and could not find the right parts.On Amazon I found the appropriate flush valve assembly. Since replacing the flush valve requires taking the tank off, I also had to purchase the tank/bowl coupling kit.American Standard 738921-100.0070A 3-Inch Flush Valve AssemblyAmerican Standard 7301021-0070A Tank to Bowl Coupling KitTotal cost for both parts together was around $20.Both parts were shipped quickly. The flush valve kit did not have instructions (I like instructions). The coupling kit had some instructions. I checked on YouTube and found several videos but none that were pertinent.>> Here’s what I did to change the flush assembly.1) Turned off the water.2) Flushed to get most of the water out of the tank.3) Used a rag to get the rest of the water out of the tank.4) Unhooked the water line where it connects to the tank.5) Used a tool that came with the coupling kit (it looks like a metal tube). I used it to unscrew the tank from the bowl. One end of the pipe looks like the end of a socket. It just fits over the bolt on to the nut. It has a hole in the pipe that you could use to slip a screw driver through for more leverage. I was able to just unscrew the bolt with my hand. I did not have to use a screwdriver to hold the bolt on the inside of the tank but could see where some people might have to. I unscrewed the nuts on each side of the bottom of the tank.6) I then lifted the tank of the bowl and laid it on its side on a rug on the counter.7) In order to remove the two tank bolt and rubber inserts, I used wire cutter to trim off the flanged tips of the rubber inserts. Once I did this they easily pushed through the holes.8) I was able to hand unthread the large plastic nut that held the flush valve to the tank.9) I removed the old flush valve.10) Then I cleaned around where the flush valve and bolts go through the bottom of the tank. I also cleaned where the flush valve sits on backside of the bowl.11) I then removed the plastic nut on the new flush valve and left the gasket on the valve. I put the valve through the hole in the bottom of the tank. (The gasket sits in between the bottom of the tank and the bottom of the flush valve.) Then I attached the plastic nut. I positioned the flush valve the way I wanted to sit inside the tank. I then hand-tightened the nut. I did not have anything large enough to get around the nut so I used the handle of some large channel lock pliers. The handles had rubber on them and I just them to get a little leverage to tighten it a half turn. Since everything is plastic you basically don't want to over tighten anything.12) Then I took the 2 black bolt rubber inserts and stuck then through the screw holes inside of the tank at the bottom. Then from the inside of the tank I pushed the bolts through the rubber inserts. Note: You have to put the inserts through the tank before you put the bolts through them.13) Next I put the large green hard rubber gasket/seat over the flush valve large white nut. The inside of the gasket is the same shape as the large nut. It should fit snugly unto the nut.14) I then placed the tank unto the bowl. As I placed the tank on the bowl, I watched to make sure that my bolts & rubber inserts and the green flush valve gasket fit into the appropriate openings on the back of the bowl.15) I then attached the water line to the bottom of the tank and hand tightened it.16) Next I put the nuts on the bolts that anchor the tank to the bowl. Then I used the provided tool (metal tube) to hand tighten them. I used a level to make sure the tank was reasonably level. The tank sits on the rubber gaskets and not directly on the bowl. That means that once the nuts are tight that they is still some give with you push on the tank. Over tightening can cause damage to your tank.17) I attached the flap chain to the tank flush handle.18) I turned on the water and checked for leaks.As long as you purchase both items (see above), changing out the flush valve is a relatively simple process. Everything that was provided in the two kits was exactly the same as the factory original parts that came with the Cadet 3. Both kits were in packaging that appeared to be original "American Standard" parts.I really did not have to use any tools. Everything was hand loosened and hand tightened. You can create a lot of problems if you use tools and over tighten. Hand tighten then check for leaks. The whole process was under 30 minutes.I am happy with my purchase. The downside is it appears that I have not completely resolved my issue. It seems that I may be still losing a little water. Since there is not an obvious leak, the only two potential places for the water to be seeping is the flapper or the seal under the flush valve. If it continues, I might have to remove the tank and try to tighten the flush valves large white nut.

### ⭐⭐⭐⭐ Fast and reasonable, but you'd better know how to install it
*by J***Y on February 21, 2021*

It arrived one day early, which was most welcome, and it fits and is much cheaper than the better alternative American Standard fancy flush valve.However, it came without a word of instruction. Nothing. It's easy to install but possible to screw up, like how tight to tighten the lock nut? Remember, this is part of a porcelein toilet, and it can crack.

## Frequently Bought Together

- AMERICAN STANDARD 738921-100.0070A Selectronic Flush Valve Assembly with Flapper, 4.5 x 5.5 x 8.7 inches, White
- American Standard 7301021-0070A Tank to Bowl Coupling Kit, 3 Inch, Multicolor
- American Standard 7381125-400.0070A Fluid Master 400A Universal Toilet Water Fill Valve, 10.00 Inch Wide x 3.00 Inch Tall x 3 Inch Deep, Black

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.sc/products/4494098-american-standard-738921-100-0070a-selectronic-3-in-flush-valve](https://www.desertcart.sc/products/4494098-american-standard-738921-100-0070a-selectronic-3-in-flush-valve)

---

*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-02-23*