Fluidmaster 502 Universal Toilet Flapper 3-Pack
- 3 flappers per pack
- Most 2 inch flush valves covered
- Adjustable dial for water saving
- 1.28 and 1.6 gallon toilets, also 3.5 gallon
- Rubber flapper, powder-coated plastic frame
- 5 year limited warranty
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A three-pack of adjustable Fluidmaster flappers for most two inch flush valves, with a dial for water use. They do not fit three inch valves, so measure the flush valve first.
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ASIN: B009XUGQQKModel: 502Category: Toilet Flappers
Overview
A homeowner fixing a running toilet gets three adjustable flappers here, each built to fit most flush valves of the common two inch size. A dial on the frame sets how much water each flush uses.
An adjustable dial and a firm frame make one pack cover several repairs or a few bathrooms. The limitation is the size limit: the listing covers two inch valves only, and it does not mention other valve diameters.
Who it's for
A house with a leaking flapper, or several toilets to refresh at once, suits the three pack. Those with unusual valves should check the flush valve diameter first.
Pros and cons
- Adjustable water-saving dial
- Three flappers per pack
- Firm frame holds its shape
- Resists chlorine and hard water
- Two inch valves only
- Dial needs setting after fitting
- Fit not guaranteed on every valve
Performance notes
The flapper seals the flush valve by pressing a rubber seat against the opening, so a straight, firm frame helps the seal. The dial changes how long the flapper stays open, which sets the water used per flush. Water chemistry affects rubber life, and the listing says it resists chlorine and hard water.
Specifications
| Brand | Fluidmaster |
|---|---|
| Model | 502 |
| Dimensions & fit | |
| Thread Size | 2 inches |
| Flush valve size | 2 inches |
| Item dimensions | 10.4 x 2.56 x 5.12 inches |
| Item weight | 7.36 ounces |
| Construction & materials | |
| Material Type | Rubber |
| Exterior Finish | Powder-coated Plastic |
| Included components | |
| Number Of Pieces | 3 |
| Warranty & support | |
| Manufacturer Warranty Description | 5-Year Limited Warranty |
| Other details | |
| Valve Type | Flapper |
| Outlet Connection Type | Direct Fit |
| Inlet Connection Type | Compression |
| Item Type Name | Toilet flapper |
Closest rivals on specs
Hibbent Large Toilet Flapper for Gerber 99-788 3 Inch- Item Weight 0.46 vs 0.26 pounds (+77%)
Lecyco Toilet Flapper for Gerber 99-788 2 Pack- Item Weight 0.46 vs 0.26 pounds (+77%)
Korky 3060BP Large Toilet Flapper 3 Inch- Item Weight 0.46 vs 0.2 pounds (+130%)
Frequently asked questions
How do I install the Fluidmaster 502 flapper?
The listing calls installation simple and easy, with a compression inlet and a direct fit outlet, but gives no steps. Follow the instructions on the pack.
Does the Fluidmaster 502 fit a three inch flush valve?
No. The listing says it fits most 2 inch flush valves and does not mention 3 inch valves.
What does the dial on the Fluidmaster 502 do?
It is described as an adjustable water-saving dial that optimizes flush performance and water use.