Gerber Avalanche 12 in. Rough-In 1.28 GPF Single Flush Toilet Tank in White

Item # 323637152 | Gerber Part # GWS38890 | UPC Code 719934940244 | UNSPSC Code 30181505
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Product Overview

Offering a sculpted, upscale design, the Avalanche toilet is designed to achieve the pinnacle of beauty and performance. Delivering a powerful flush and ease of installation, the Avalanche toilet features solid engineering for outstanding operation. Gerber's proprietary QuietClean technology provides a softer sounding flush and nearly twice the bowl rinsing power. This combined with the new KeepClean surface treatment maximizes bowl cleanliness. KeepClean is a super smooth, permanent glaze coating that prevents unsightly residue from sticking. KeepClean not only leaves the bowl cleaner as you flush but affords less manual cleaning. An elegantly contoured tank with flush-fit cover and slight edging detail on the bowl offers a streamlined yet stunning aesthetic. A 3" flush valve and extra-large, dual-fed siphon jet help power water into and around the bowl while the large, fully glazed 2" trapway ensures virtually clog-free performance. A rigid flapper and durable stainless steel flushing arm resist corrosion. A Fluidmaster 400A fill valve ensures fast tank refills. Boasting the largest footprint of Gerber's toilets, the Avalanche is an ideal option for both new installations and replacement applications to conceal flooring imperfections from previous toilet installations. Gerber offers an industry-leading 15-year warranty on parts and components and a limited lifetime warranty on vitreous china. Reach the peak of outstanding function and exquisite styling with Avalanche.

  • 12" Rough-In Tank; Bowl Options: Ada Round Front Gav31852, Elongated Gav31862 And Ada El Gav31828
  • Gerber KeepClean Surface Treatment
  • Gerber QuietClean Flush System
  • 3" Flush Valve for Maximum Water Force
  • Fluidmaster 400A Fill Valve
  • Corrosion-Resistant Rigid Flapper
  • Double Nut Multi-Point Tank-to-Bowl Mounting System for Tool-Free Installation
  • Chrome Metal Tank Lever with Solid Durable Stainless Arm
  • MaP Score Of 1,000 Grams
  • 60' Drain Line Carry (Standard Is 40')
  • IAPMO Certified
  • Flapper Replacement # G0099014

Proposition 65 Information

Prop65 Warning Icon WARNING: WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to


Bath Product Type
Toilet Tank
Certifications and Listings
UPC Certified (Uniform Plumbing Code)
Flushing Type
Single Flush
No Additional Items Included
Manufacturer Warranty
15 Years
Vitreous China
Product Depth (in.)
Product Height (in.)
Product Weight (lb.)
Product Width (in.)
Standard Color Family


15 Years