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Toilet Tank to Bowl 3-in. Coupling Kit
- Durable construction
- Reliable performance
- Easy to install
- Check repair part information for compatibility
Manufacturer Resources
Product Specs
- Product Type:
- Toilet Tank
- Family:
- REPAIR PARTS
- Product Group:
- Washroom/Bath Accessories
- Product Subgroup:
- Parts and Accessories
- Product Length:
- 7.5
- Product Height:
- 12.913
- Product Weight:
- 0.485
- Product Width:
- 1
- Department:
- Plumbing
- Parts and Accessories Type:
- Toilet Tank
- Application:
- Toilet
- Country of Origin:
- United States
- Luxury/Non Luxury:
- Repair Parts
- Residential Commercial:
- Repair Parts
American Standard 7301021-0070A – Frequently Asked Questions
1) What does the American Standard 7301021 tank to bowl coupling kit actually include and do?
The 7301021 is a tank-to-bowl coupling kit for American Standard two-piece toilets. It's the hardware that joins the tank to the bowl and seals the joint, so it's what you replace when water seeps from between the tank and the bowl or the tank rocks on its mounting. It's sold as a repair part under MPN 7301021-0070A, with no applied finish on the hardware.
2) Will the American Standard 7301021 coupling kit fit any brand of two-piece toilet?
Treat it as an American Standard part. It's cataloged as an American Standard repair part for their toilet tanks, and tank-to-bowl bolt spacing, bolt length and gasket profile vary by manufacturer and by model within a brand. Match it against the repair part list for your specific toilet model before ordering rather than assuming a generic fit.
3) My toilet leaks at the base of the tank. Do I need a tank to bowl kit or a wax ring?
Two different leaks. Water appearing between the tank and the bowl, or dripping from the bolt heads inside the tank, is the tank-to-bowl joint, and that's what the 7301021 kit rebuilds: bolts, washers and the sealing gasket. Water pooling on the floor around the base of the fixture is the closet flange seal, and that needs a wax ring or waxless seal plus closet bolts, not this kit. Dry the outside of the bowl and watch where the water starts.
4) I'm a property manager replacing tank hardware across a building. Is the 7301021 kit something maintenance staff can install without a plumber?
It's a straightforward swap. Shut the supply, flush and sponge the tank dry, remove the old bolts and gasket, then set the new hardware and draw the tank down evenly. No soldering, no cutting, no threading of supply pipe. The one thing that decides success is that the kit matches your toilet model, so pull the model number off the inside of the tank first and check it against the repair part list.
5) Is the 7301021 coupling kit a residential-only part, or can I use it in a commercial restroom?
The kit is classified as a repair part rather than being restricted to either setting, so the deciding factor is the toilet, not the building. If the fixture is an American Standard two-piece tank-type toilet and the model matches, it's the same repair in an apartment as in an office restroom. Note that commercial restrooms are frequently flushometer (tankless) bowls, and this kit does nothing for those.
6) Does the American Standard 7301021 kit include the flush valve or the fill valve?
No. It's coupling hardware only, covering the tank-to-bowl connection. If the tank is running constantly you need a fill valve or flapper; if water is bypassing into the bowl from the tank you're looking at the flush valve. Those are separate repair parts and none of them come in this kit.
7) Should I replace the tank to bowl hardware whenever I pull an American Standard tank off the bowl?
Yes, and it's cheap insurance. The rubber gasket takes a compression set and the bolt washers deform, so reusing them after a pull is the usual reason a tank weeps a week after the repair. Anytime the tank comes off, whether you're changing the flush valve or resetting the bowl, put new coupling hardware back under it. Keeping a couple of these on the shelf saves the second trip.
8) How much does the American Standard 7301021 tank to bowl kit weigh, and how big is the package?
Light part. The kit is listed at 0.485 lb, with stated dimensions of 12.913 x 7.5 x 1. That's a small carded or bagged repair item, which matters if you're stocking a truck or a maintenance closet with a handful of them.
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Can I return it if it doesn’t work for me?
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reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the American Standard 7301021-0070A come with a warranty?
Absolutely. The American Standard 7301021-0070A is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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