Gerber made many toilet tanks that are close in appearance, so buying a lid by color and approximate size alone is risky. The tank model number is the best starting point.
Where to find a Gerber tank model number
Gerber identifies the model number for many two-piece toilet tanks on the back wall inside the tank near the water line. You may also see a cast date, barcode or other production codes nearby. Record all of them before shopping.
Why the exact version can matter
Some Gerber families were produced in more than one version. A familiar example is the 28-590 family, where shape and production differences can matter when choosing a replacement lid. Do not treat a shared base number as proof that every lid from that family interchanges.
Measure and photograph before ordering
Take the lid off and measure the maximum width and depth. Photograph the entire top and underside straight on. Pay special attention to the rear edge, corner radius, underside feet and locating tabs. Those small features often separate two otherwise similar Gerber lids.
Use these details together
- Gerber tank model number
- Cast date if present
- Any lid markings
- Width and depth
- Top and underside shape
- Color
Browse the current Gerber toilet tank lid collection. Because original replacement lids are sourced individually, availability changes as lids sell and new ones come in.
For help locating a number on the toilet, see where to find your toilet model number.