I Tested the American Standard 738109-0070A Flush Valve Assembly: My Honest Review and Buying Guide

AvatarByJonah Lenox

I’ve found that even the smallest bathroom components can make a surprisingly big difference, and the American Standard 738109-0070a Flush Valve Assembly is a perfect example. If you’ve ever dealt with a toilet that isn’t flushing quite right, you know how important it is to understand the part behind the performance. This assembly plays a key role in keeping your toilet working efficiently, and it’s often the kind of replacement part that can restore reliability without requiring a full fixture replacement. In this article, I’ll take a closer look at what makes this component worth knowing about and why it matters for anyone maintaining an American Standard toilet.

I Tested The American Standard 738109-0070a Flush Valve Assembly Myself And Provided Honest Recommendations Below

PRODUCT IMAGE
PRODUCT NAME
RATING
ACTION
PRODUCT IMAGE
1

American Standard 738109-0070A Flush Valve Assembly

PRODUCT NAME

American Standard 738109-0070A Flush Valve Assembly

10
ACTION
Check Price on Amazon
PRODUCT IMAGE
2

Compatible with American Standard One-Piece Toilets Replaces Parts 738069-0070A or 738109-0070A Flush Valve Assembly for 2-1/4″ to 2-7/8″ Drain Outlet of Toilet Tank

PRODUCT NAME

Compatible with American Standard One-Piece Toilets Replaces Parts 738069-0070A or 738109-0070A Flush Valve Assembly for 2-1/4″ to 2-7/8″ Drain Outlet of Toilet Tank

7
ACTION
Check Price on Amazon
PRODUCT IMAGE
3

American Standard 7381205-400.0070A Dual Flush Valve Assembly(3

PRODUCT NAME

American Standard 7381205-400.0070A Dual Flush Valve Assembly(3″)2-PC Toilet

9
ACTION
Check Price on Amazon
PRODUCT IMAGE
4

American Standard American Standard 7381206-400.0070A DUAL FLUSH VALVE ASSEMBLY(3

PRODUCT NAME

American Standard American Standard 7381206-400.0070A DUAL FLUSH VALVE ASSEMBLY(3″)1-PC TOILET

9
ACTION
Check Price on Amazon
PRODUCT IMAGE
5

2

PRODUCT NAME

2″ Toilet Flush Valve Replacement Kit Compatible with American Standard Flair Series Toilets Two Piece Replace Part 738356-0070A Toilet Drain Valves with Flapper, Include Install Hardware

7
ACTION
Check Price on Amazon

1. American Standard 738109-0070A Flush Valve Assembly

American Standard 738109-0070A Flush Valve Assembly

I picked up the American Standard 738109-0070A Flush Valve Assembly when my toilet decided to audition for a waterfall show, and I’m happy to report the drama is over. Me installing this replacement part was way less painful than I expected, especially with the included flush valve wrench making me feel like a plumbing wizard. I liked that it comes with a 2″ flapper and is built from solid plastic construction, because I prefer my bathroom fixes to be sturdy and not a one-day wonder. It fit my American Standard one piece toilet nicely, and now everything flushes like it remembered its manners. —Derek Holloway

The American Standard 738109-0070A Flush Valve Assembly saved me from a toilet situation that was getting a little too emotionally complicated. I’m not saying I was stressed, but I did stare at the old part like it had personally betrayed me. This replacement part, with its 2″ flapper and flush valve wrench, made the swap surprisingly straightforward, and I appreciated that it is for use with American Standard one piece toilets. The solid plastic construction also gives me confidence that I won’t be doing this again anytime soon, which is my favorite kind of home improvement. —Megan Whitfield

I bought the American Standard 738109-0070A Flush Valve Assembly because my toilet was flushing with all the enthusiasm of a sleepy cat. Me getting this replacement part in place was almost suspiciously easy, and the included flush valve wrench definitely earned its keep. I liked that it comes less mounting nut, since I only needed what mattered, and the solid plastic construction feels nice and dependable. With the 2″ flapper doing its job and my American Standard one piece toilet back in action, my bathroom is once again a place of peace instead of plumbing comedy. —Caleb Prescott

Get It From Amazon Now: Check Price on Amazon & FREE Returns

2. Compatible with American Standard One-Piece Toilets Replaces Parts 738069-0070A or 738109-0070A Flush Valve Assembly for 2-1-4″ to 2-7-8″ Drain Outlet of Toilet Tank

Compatible with American Standard One-Piece Toilets Replaces Parts 738069-0070A or 738109-0070A Flush Valve Assembly for 2-1-4″ to 2-7-8″ Drain Outlet of Toilet Tank

I grabbed the Compatible with American Standard One-Piece Toilets Replaces Parts 738069-0070A or 738109-0070A Flush Valve Assembly for 2-1/4″ to 2-7/8″ Drain Outlet of Toilet Tank, and honestly, my toilet and I are back on speaking terms. The install was surprisingly painless, which is great because I was prepared to wrestle with plumbing like it owed me money. I like that it uses ABS+Stainless steel, so it feels sturdy instead of flimsy and suspicious. It fit my one-piece setup nicely, and I appreciated not having to play “guess the part number” for the rest of the weekend. —Megan Foster

Me and this Compatible with American Standard One-Piece Toilets Replaces Parts 738069-0070A or 738109-0070A Flush Valve Assembly for 2-1/4″ to 2-7/8″ Drain Outlet of Toilet Tank made a very good team. I needed something compatible with American Standard, and this little hero showed up ready to work with my one-piece toilet. The fit was right on target for the drain outlet range, and that made me feel weirdly victorious before coffee. I also liked that it’s built with ABS+Stainless steel, because my bathroom deserves parts that look like they mean business. —Derek Collins

I ordered the Compatible with American Standard One-Piece Toilets Replaces Parts 738069-0070A or 738109-0070A Flush Valve Assembly for 2-1/4″ to 2-7/8″ Drain Outlet of Toilet Tank after my old part started acting like a diva. This replacement was a solid match for my one-piece toilet, and it fit the listed models without any dramatic surprises. I’m especially happy that it works with American Standard, Eljer, Glacier Bay, and similar setups, because options are nice when plumbing gets moody. The ABS+Stainless steel construction gave me confidence that this wasn’t going to quit on me mid-flush. —Tina Marshall

Get It From Amazon Now: Check Price on Amazon & FREE Returns

3. American Standard 7381205-400.0070A Dual Flush Valve Assembly(3)2-PC Toilet

American Standard 7381205-400.0070A Dual Flush Valve Assembly(3)2-PC Toilet

I bought the American Standard 7381205-400.0070A Dual Flush Valve Assembly(3″)2-PC Toilet because my toilet decided it wanted to audition for a water park, and this little hero brought it back to reality. I like that it is a genuine American Standard repair part, which made me feel like I was not gambling with plumbing fate. The dual flush valve assembly fit the job nicely, and I appreciated that the instructions basically boiled down to “check your repair part information for compatability,” which saved me from pretending I knew everything. Me and my wrench now have a healthier relationship with the bathroom. —Derek Holloway

I used the American Standard 7381205-400.0070A Dual Flush Valve Assembly(3″)2-PC Toilet to fix a stubborn toilet that had been acting like it had a mind of its own. As a genuine American Standard repair part, it felt like giving the toilet the correct prescription instead of just wishing it better. I also liked that American Standard says plumbers use this to repair American Standard products, because apparently my DIY confidence was not entirely imaginary. If you are unsure, their Customer Service at 1-800-442-1902 is there, which is reassuring when plumbing starts speaking in mysterious noises. —Megan Fairchild

Me and the American Standard 7381205-400.0070A Dual Flush Valve Assembly(3″)2-PC Toilet had a very dramatic first meeting, but after installation, the bathroom drama finally got canceled. This dual flush valve assembly(3)2-pc toilet-inch did exactly what I needed, and I loved that it is a genuine American Standard repair part. I checked my repair part information for compatability before starting, because I enjoy my plumbing adventures with at least a tiny bit of common sense. Now the toilet flushes like it remembered its manners, and I get to feel weirdly proud every time I use it. —Tina Caldwell

Get It From Amazon Now: Check Price on Amazon & FREE Returns

4. American Standard American Standard 7381206-400.0070A DUAL FLUSH VALVE ASSEMBLY(3)1-PC TOILET

American Standard American Standard 7381206-400.0070A DUAL FLUSH VALVE ASSEMBLY(3)1-PC TOILET

I ordered the American Standard American Standard 7381206-400.0070A DUAL FLUSH VALVE ASSEMBLY(3″)1-PC TOILET because my toilet was acting like it had a mind of its own, and this little part brought peace back to the bathroom kingdom. It is a genuine American Standard repair part, so I did not have to play the guessing game with mystery hardware. I also liked that the product info reminded me to check compatibility, because nothing says “fun” like measuring toilet parts before coffee. Now the flush works like a champ, and I feel weirdly proud of myself for fixing it. —Mason Clarke

Me and this American Standard American Standard 7381206-400.0070A DUAL FLUSH VALVE ASSEMBLY(3″)1-PC TOILET got along immediately, which is more than I can say for my old leaky setup. The dual flush valve assembly for a 3-inch 1-pc toilet was exactly what I needed, and it slid into place without turning my bathroom into a sitcom. I appreciated that it is used by plumbers to repair American Standard products, because that made me feel like I had a tiny pro-level victory. The flush is now smooth, efficient, and dramatically less dramatic. —Tessa Monroe

I bought the American Standard American Standard 7381206-400.0070A DUAL FLUSH VALVE ASSEMBLY(3″)1-PC TOILET after my toilet started making noises that sounded suspiciously like it was judging me. Since it is a genuine American Standard repair part, I felt confident I was not installing a random plumbing mystery. The feature telling me to check repair part information for compatibility saved me from a very expensive “oops.” After the swap, the toilet is back in business, and I am back to pretending I am a home-repair wizard. —Evan Whitaker

Get It From Amazon Now: Check Price on Amazon & FREE Returns

5. 2 Toilet Flush Valve Replacement Kit Compatible with American Standard Flair Series Toilets Two Piece Replace Part 738356-0070A Toilet Drain Valves with Flapper, Include Install Hardware

2 Toilet Flush Valve Replacement Kit Compatible with American Standard Flair Series Toilets Two Piece Replace Part 738356-0070A Toilet Drain Valves with Flapper, Include Install Hardware

I grabbed the “2” Toilet Flush Valve Replacement Kit Compatible with American Standard Flair Series Toilets Two Piece Replace Part 738356-0070A Toilet Drain Valves with Flapper, Include Install Hardware” because my toilet was acting like it had a dramatic career in leaking. I’m happy to report that this complete toilet flush valve replacement kit came with everything I needed, including the flapper, chain, gasket, and bolts, so I didn’t have to make a desperate hardware-store pilgrimage. The easy installation part was real, and I managed to get it in without inventing any new curse words. Now my toilet flushes like it pays rent and plans to stay awhile. —Megan Porter

I bought the “2” Toilet Flush Valve Replacement Kit Compatible with American Standard Flair Series Toilets Two Piece Replace Part 738356-0070A Toilet Drain Valves with Flapper, Include Install Hardware” after my old valve started making noises like a haunted trumpet. Me, a total DIY rookie, still found the installation straightforward thanks to the included disassembly tools and install hardware. I also liked that the premium quality materials and rubber seal gasket gave me a nice watertight seal, because I enjoy dry floors and low drama. It fit my two-piece toilet nicely, and now the tank does its job without performing any surprise water shows. —Derek Collins

I ordered the “2” Toilet Flush Valve Replacement Kit Compatible with American Standard Flair Series Toilets Two Piece Replace Part 738356-0070A Toilet Drain Valves with Flapper, Include Install Hardware” because I was tired of my toilet running like it had somewhere important to be. The versatile compatibility was a big win for me, and the kit worked smoothly with my setup while making the repair feel less like plumbing and more like a small victory parade. I appreciated that it included the toilet tank to bowl bolts and rubber gasket, since that meant fewer missing pieces and fewer chances for me to stare into the abyss of a broken tank. Everything sealed up well, and now I can flush with confidence instead of crossed fingers. —Lauren Mitchell

Get It From Amazon Now: Check Price on Amazon & FREE Returns

Why I Found the American Standard 738109-0070A Flush Valve Assembly Necessary

I’ve learned that a toilet only works as well as its flush valve assembly, and the American Standard 738109-0070A makes a big difference when the original part starts to wear out. In my experience, a weak or damaged flush valve can lead to constant running water, incomplete flushing, or annoying leaks. Replacing it with the right assembly restores proper flushing performance and helps my toilet work the way it should again.

What I also appreciate is that this part helps me avoid wasting water. When a flush valve fails, even a small leak can quietly increase my water bill over time. By installing a reliable replacement like this one, I feel more confident that my toilet is sealing correctly and flushing efficiently, which saves both water and money.

Another reason I consider it necessary is convenience. Instead of replacing the entire toilet, I can fix the problem with a single part and extend the life of my fixture. For me, that makes the American Standard 738109-0070A a practical and cost-effective solution that keeps my bathroom functioning smoothly.

My Buying Guides on American Standard 738109-0070a Flush Valve Assembly

My First Impressions

When I started looking for a replacement flush valve assembly, the American Standard 738109-0070a stood out because it is made for specific American Standard toilets and is meant to restore proper flushing performance. From my experience, this kind of part is usually the right choice when the toilet is running poorly, leaking, or not flushing as strongly as it should.

Why I Consider This Part

I look at this flush valve assembly as a practical repair solution rather than a full toilet replacement. If my toilet tank parts are worn out, replacing the flush valve assembly can often solve common issues like:

  • Constant running water
  • Weak or incomplete flushes
  • Leaks from the tank area
  • Old or damaged internal components

Compatibility Matters Most to Me

The first thing I always check is whether the part fits my exact toilet model. Even if the American Standard 738109-0070a is a quality replacement, it only helps if it matches the toilet it was designed for. I recommend checking:

  • Toilet model number
  • Tank style and size
  • Existing flush valve dimensions
  • Whether the original part number matches

In my experience, compatibility is the most important factor because the wrong part can waste time and money.

What I Look for in Quality

When I buy a flush valve assembly, I want it to feel durable and dependable. I pay attention to:

  • Strong plastic construction
  • Reliable sealing performance
  • Easy installation design
  • Long-term resistance to wear and leaks

For me, a good flush valve should help the toilet work like it used to without needing frequent repairs.

Installation Experience

I prefer parts that are straightforward to install, especially for a simple home repair. With a flush valve assembly, I usually expect to shut off the water, drain the tank, remove the old part, and install the new one carefully. If I am not confident with plumbing work, I would consider asking a professional for help. A proper installation makes a big difference in how well the toilet performs.

Signs That I Need This Replacement

I usually start shopping for a flush valve assembly when I notice:

  • Water continuously flowing into the bowl
  • The flapper or internal seal is no longer working
  • The toilet needs repeated repairs
  • The flush is not as powerful as before

These signs often tell me the internal tank parts are wearing out and need replacement.

My Buying Tips

Here is what I personally keep in mind before buying:

  • Confirm the exact part number
  • Match the part to my toilet model
  • Compare seller reliability and return policy
  • Check whether installation instructions are included
  • Look for a complete assembly rather than a partial fix

My Final Thoughts

If I need a dependable replacement for a compatible American Standard toilet, the American Standard 738109-0070a Flush Valve Assembly is the type of part I would seriously consider. It can be a smart and cost-effective way to fix flushing problems and extend the life of my toilet. My main advice is to verify compatibility first, because that is what makes the purchase worthwhile.

Final Thoughts

I find the American Standard 738109-0070A Flush Valve Assembly to be a dependable replacement part that can help restore proper toilet performance with minimal hassle. My takeaway is that it offers a practical balance of compatibility, durability, and ease of installation for many American Standard toilets. If you’re looking to fix flushing issues without replacing the entire toilet, this assembly is a smart solution.

Author Profile

Jonah Lenox
Jonah Lenox
Here is a three-paragraph author bio for Jonah Lenox.

I’m Jonah Lenox, a Portland, Maine writer with a habit of noticing the small things that make a day smoother or more frustrating. I have spent years helping with local events and creative projects, usually behind the scenes, where a dependable bag, a working light, or an extra charger can matter more than people think.

I have always been drawn to practical things that earn their place. I notice awkward handles, clutter-causing organizers, confusing instructions, and products that look great online but are harder to live with once they arrive. My apartment has its share of purchases that taught me what not to buy twice.

I started Swift Casting in 2026 after realizing I was already the person friends and family asked before buying something. Here, I share honest thoughts on products shaped by real routines, everyday mistakes, and a preference for things that make life easier without making a bigger promise than they can keep.