Tank - Briggs 4930 or 4920 Color:Harvest Gold Note: Gerber had an older

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

Toilet Model: Dual Flush

Tank Size: 18

Lid P/N: 735200

Tank P/N: 160 or 180 or 3121

Tank - Briggs 4930 or 4920 Color:Harvest Gold Note: Gerber had an olderManufacturer: 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