Tank - Briggs 4930 or 4920 Color:Harvest Gold Tank Size: 18

Tank Size: 18

Tank P/N: 4057

Note: Gerber had an older version of the Viper toilet which looks nearly the same but the new lid and tank are slightly smaller and not interchangable

Lid P/N: 735200

Tank - Briggs 4930 or 4920 Color:Harvest Gold Tank Size: 18Manufacturer: Briggs Tank P N: 4930 or 4920 Rough In: 12" Bolt Width: 5. 5" Flush Valve Diameter: 2. 5" Gallons per Flush: 1. 6 or 3. 5 Internal parts and Briggs 7421 tank lid available separately. Why 1. 6 or 3. 5 GPF? Briggs made this originally as a 3. 5 gallon per flush toilet, and then during the changeover to 1. 6, they kept the porcelain the same and just changed out the internal parts to restrict the amount of water that would fill up in the