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Cadet 3 5.5-in. Compact Toilet Tank Flush Valve 1.28 GPF
- Durable construction
- Easy to install
- Chemical resistant flapper
- Check the repair part information for your toilet to confirm compatibility
Manufacturer Resources
Product Specs
- Product Type:
- Toilet Tank
- Product Group:
- Washroom/Bath
- Product Subgroup:
- Toilet
- Department:
- Plumbing
American Standard 738942-102.0070A – Frequently Asked Questions
1) Which American Standard toilets does the Cadet 3 flush valve 738942-102.0070A fit?
It's the replacement flush valve for American Standard Cadet 3 compact toilets that use a 5.5 inch valve and flush at 1.28 GPF. Cadet 3 covers several tank configurations over the years, so match the repair part information for your specific toilet model before you order, since a 5.5 inch valve will not seat correctly in a tank built around a different valve height.
2) My Cadet 3 keeps running between flushes. Is replacing the flush valve the right fix?
Usually, yes. Continuous or intermittent running on a Cadet 3 almost always traces to the flapper seal on the flush valve rather than the fill valve. Replacing the whole valve assembly, flapper included, rules out both a warped seat and a hardened flapper in one go. If the water level is instead creeping into the overflow tube, that's the fill valve and this part won't solve it.
3) Will this flush valve change how much water my toilet uses per flush?
No. The valve is matched to a 1.28 GPF flush, which is the same volume the Cadet 3 compact was built around. Installing it restores the original flush rate rather than converting the fixture to a different one. If your tank is a 1.6 GPF model, this is not the valve for it.
4) Is the flapper included with this American Standard flush valve or do I buy it separately?
The assembly comes with a chemical resistant flapper on it. That matters for property managers running in-tank cleaner tablets or chlorinated water, which is what chews through standard rubber flappers and causes the phantom running that shows up on the water bill.
5) Can maintenance staff swap this Cadet 3 flush valve without a plumber?
It's a standard tank-off repair: shut the supply, drain and remove the tank, pull the old valve and gasket, set the new one and re-hang the tank. American Standard lists it as easy to install, and no pipe work or soldering is involved. Budget a new tank-to-bowl gasket and bolts if the existing ones are corroded, as those are not part of the valve.
6) Can I use this valve on a non-American Standard toilet?
It is built as an American Standard Cadet 3 service part, and the 5.5 inch height plus the flapper seat geometry are specific to those tanks. For another brand of toilet, source the flush valve the fixture manufacturer specifies rather than adapting this one.
7) Does the finish option on this flush valve matter when ordering?
No. The valve is an in-tank component and ships unfinished, so there is nothing to match to your trim or fixture color. There is one configuration to order, part number 738942-102.0070A.
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Does the American Standard 738942-102.0070A come with a warranty?
Absolutely. The American Standard 738942-102.0070A is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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