







🚀 Flush like a champion — upgrade to unstoppable performance!
The American Standard 7381983-400.0070AP is a premium 4-inch flush valve assembly designed exclusively for Champion two-piece toilets. Featuring the industry’s largest flush valve, it delivers a powerful, clog-preventing flush with durable stainless steel construction and precise OEM compatibility, ensuring long-lasting, maintenance-free performance.





| ASIN | B00263YXYI |
| Best Sellers Rank | #71,335 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #94 in Toilet Flush Valves #6,173 in Kitchen & Bath Fixtures |
| Brand Name | American Standard |
| Connector Type | Barb |
| Customer Reviews | 4.3 4.3 out of 5 stars (1,184) |
| Exterior Finish | Chrome |
| Global Trade Identification Number | 00012611413728 |
| Included Components | Flush Valve Assembly |
| Inlet Connection Size | 4 Inches |
| Inlet Connection Type | Barb |
| Item Dimensions | 4.6 x 5.7 x 6.8 inches |
| Item Type Name | Flush Valve Assembly for 1 Piece Toilets |
| Item Weight | 113 Grams |
| Manufacturer | AMMM9 |
| Manufacturer Warranty Description | “*1 year Limited warranty from date of purchase” |
| Material Type | Plastic |
| Model Number | 3280.040-0070A |
| Number of Ports | 1 |
| Outlet Connection Size | 4 Inches |
| Outlet Connection Type | Barb |
| Size | 6.40 in wide x 7.00 in tall x 10.3 in deep |
| Specification Met | WaterSense |
| Thread Size | 4 inches |
| Thread Type | National Pipe Thread (NPT) |
| UPC | 012611413728 |
| Unit Count | 1.0 Count |
| Valve Type | flush valve |
S**E
Don't be afraid. It's not that hard to replace it yourself.
Quite pleased with myself for installing. Youtube helped. The toilet works great now. Being a 65+ female accountant this job was a bit foreign to me. I didn't realize until I got the toilet tank off that if you are going thru the trouble of replacing the flush valve then you really should get a new gasket kit as well. It took another day for the gasket to arrive but in the end my toilet is poised to be working well for the next 10+ years.
S**N
Great
Perfect product
A**S
Works fine, like the original.
It works, but the squeal persisted. Apparently, it was a different issue, the taller narrow thing to the left of this flush valve. I have zero confidence in some handymen - even the diagnosis was wrong. My motto is, generally, do it yourself and it will get done right.
M**R
Excellent replacement
Easy installation. Works perfectly. Description says stainless steel, it is all plastic but works fine. One star off for description error
A**R
American standard flush valve replacement
Replacement valve was identical for what was in the toilet, pretty much cut and dry on the installation worked nicely
Y**D
Junk in a box!!!
Replaced because the sealant ring on the flush valve was worn out and toilet kept phantom flushing. The most difficult part of the procedure was taking the tank off because of the recessed taps on the tank bolts. However the new valve is leaking. I had read about the inferior design of the flush valve on this toilet, but I thought the new valve would get me at least to my remodel (two years) and I would replace the toilet anyhow. Nope, didn't make it one night. I am not going to ask for a refund or replacement because I have no confidence in this product at this point. I will minimize the use of this toilet and refill with the wall valve. My wife is happy because she will probably get the timeline on the downstairs moved forward! Don't recommend this product!!! My trust in American Standard is less than it was previously.
J**S
Worked
Perfect fit.
C**A
Very disappointed
This new design does not work nearly as well as my original that lasted over a decade. I was hoping to just quickly switch out the little flapper lid because a piece mysteriously broke off my original. This is not possible because they changed how it attaches. The instructions don't even mention my old style (maybe everyone else's broke long ago). I had to search all over and luckily someone on YouTube showed the original version but then learned I had to replace whole unit. This meant hiring a plumber because you need to take off the whole tank. Did this many years ago when they had reca but too old now. It's ridiculous to do this for a faulty flapper and now it doesn't even work well. A plumbing forum said trash the whole toilet because of dumb design.... I could've done that for the cost of parts to replace (this part plus the other separate kit with washers that are usually all in one kit. A competitor with a K has aftermarket kit but plumber wanted to go OEM. I may try that kit or get rid of my Champion toilet. I just replaced the expensive flush handle too so trying to deal with it.
N**O
El producto lo puede instalar uno mismo al ver el actual instalado y solo desatornillas y atornillas el nuevo
S**N
Easy to install but still would’ve been nice if it came with installation instructions. Just came as the piece… no box, no instructions, no bolts. But worked like a charm… so 5 stars
G**O
Es un diseño muy bueno y sus materiales de excelente calidad.
S**N
Everything fit perfectly and works great. Definitely recommend
A**R
I was pleased to find the reviews on Amazon that sait this would be a good replacement and upgrade for my 17 year old flush valve. The installation instructions were good except for 2 points. They said to use 4 new screws although they were not included and they did not warn that the fill valve may need to be rotated to clear the pipe on the side of this new style flush valve. Fortunately my old screws were in excellent condition and the float on the fill valve barely cleared. So far after a few weeks everything is working great.
Trustpilot
1 month ago
1 day ago