Gerber Avalanche Two-Piece Elongated 1.28 GPF Comfort Height Toilet

Model 21-808
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Glaze
Standard vitreous china
Design
Two-piece elongated Comfort Height, commercial-residential bridge build
Map Score
1000
Bowl Shape
Elongated
Flush Type
Gerber ViPER Gravity (3-inch flush valve)
Watersense
1

Gerber Avalanche Two-Piece Elongated 1.28 GPF Comfort Height Toilet Review

Gerber Avalanche Two-Piece Elongated 1.28 GPF Comfort Height: Trade-Grade Reliable Two-Piece

The Gerber Avalanche Two-Piece Elongated 1.28 GPF Comfort Height Toilet is one of Gerber's volume two-piece offerings — designed for plumbing professionals and property managers who need reliable, well-engineered two-piece toilets for residential and light commercial installations. At $229-$299 retail at Ferguson, Home Depot, and plumbing supply houses, the Avalanche delivers Gerber's signature trade-grade build quality with elongated bowl comfort, ADA comfort height, and Gerber's robust internal flush mechanism rated for higher use intensity than typical residential value-tier toilets.

Gerber's Trade-Grade Position

Gerber is one of the few "plumber's brands" in the US toilet market — brands that are well-known to plumbers but less familiar to consumer buyers. The brand sells primarily through plumbing supply houses (Ferguson, Hajoca, Winsupply) and trade-focused retail, with 90+ years of US plumbing manufacturing heritage. Gerber toilets are known for: standard-spec parts that any plumber can service, robust mechanical construction without designer aesthetic premium, and pricing competitive with American Standard at the trade tier.

Avalanche's Position in Gerber's Catalog

  • Viper Compact: $249-$329 — compact-projection trade toilet
  • Maxwell: $199-$269 — round-front 1.6 GPF heritage spec
  • Avalanche (this model): $229-$299 — volume elongated 1.28 GPF
  • Wicker Park: $399-$499 — modern one-piece

Elongated Bowl + Comfort Height

The Avalanche pairs the most ergonomically comfortable configuration: elongated bowl (~18.5" length) for adult seating comfort + ADA comfort height (~17" floor-to-rim) for easier sit-and-stand. This is the dominant US toilet configuration since 2010 and appropriate for most adult-focused bathroom installations.

1.28 GPF Trade-Grade Flush

Gerber's trade-grade flush mechanism is engineered for higher use intensity than typical residential value-tier flush valves. The Avalanche delivers reliable 1.28 GPF WaterSense performance with mechanical durability suitable for light commercial use and high-traffic residential installations (multi-family rental properties, primary master bathrooms).

Two-Piece Construction

Standard two-piece (separate tank and bowl). Tank-to-bowl gasket and mounting bolts included. The two-piece design is easier to ship, easier to install, and easier to service than one-piece alternatives — important for trade buyers handling multiple installations.

FluidMaster-Compatible Internals

The Avalanche uses FluidMaster-compatible flush mechanism components, with broad parts availability through plumbing supply houses indefinitely. Replacement parts cost $5-$25 at any hardware store or plumbing supply for fill valve, flush valve, flapper, or trip lever replacement at year 5-10 wear-out.

Specifications

  • Form factor: Two-piece floor-mount
  • Bowl shape: Elongated
  • Material: Vitreous china
  • Flush volume: 1.28 GPF single-flush
  • Rough-in: 12 inches
  • Seat height: ~17 inches (ADA comfort height)
  • Seat: Sold separately ($15-$45)
  • Color: Glossy White (standard), Bone (limited)
  • Warranty: 5 years vitreous china, 1 year mechanical (residential); 1 year all (commercial)
  • MaP rating: 800g+
  • Certifications: WaterSense, ADA compliant, ASME A112.19.2

Installation

  • Standard 12-inch rough-in
  • Cold water supply line
  • Wax ring + flange bolts ($15-$25 separate)
  • Seat purchased separately
  • Two-piece installation: 1.5-2 hours, $150-$350 (or trade-rate $120-$250 for plumbers familiar with Gerber)

Care

  • Standard porcelain cleaners safe
  • Pumice stones safe for mineral deposits
  • Bleach soaks safe
  • Avoid steel wool
  • Tank-to-bowl seal area: clean carefully

Pros

  • Trade-grade build quality with broad professional plumber familiarity
  • Elongated bowl + ADA comfort height — most ergonomic configuration
  • 1.28 GPF WaterSense certified
  • Robust mechanical construction rated for higher use intensity
  • FluidMaster-compatible parts — universal availability
  • Parts availability through plumbing supply houses indefinitely
  • Aggressive value-tier pricing $229-$299
  • Bone color option available (limited)
  • Light commercial-rated mechanical durability

Cons

  • Less aesthetic refinement than modern-design competitors at similar price
  • Seat sold separately ($15-$45 additional)
  • 5-year china warranty weaker than Delta lifetime china at similar/lower price
  • Lower consumer brand recognition (well-known to plumbers only)
  • Traditional profile reads utilitarian
  • Limited color options (White standard, Bone limited)
  • Available primarily through plumbing supply houses — Home Depot/Lowe's distribution intermittent

Who Should Buy

  • Property managers and landlords specifying reliable two-piece toilets for multi-unit residential
  • Plumbing contractors and trade buyers prioritizing reliability over aesthetics
  • Light commercial installations where Gerber's commercial-rated build matters
  • Renovations where modern design isn't priority but reliable elongated comfort height is
  • Buyers whose plumber recommended Gerber — trust the plumber's expertise on serviceability
  • Multi-bathroom installations needing consistent trade-grade specification

Comparison Decisions

  • Avalanche vs. Viper Compact ($249-$329): Avalanche has elongated bowl + standard projection; Viper Compact has elongated bowl + compact projection. Pick on bathroom geometry.
  • Avalanche vs. American Standard Cadet 3 Elongated ($199-$259): Cadet 3 wins on PowerWash flush engineering and EverClean glaze. Avalanche wins slightly on price and trade familiarity. Both excellent — Cadet 3 has more consumer brand recognition.
  • Avalanche vs. Delta Hatcher ($149-$199): Delta wins on price and lifetime china warranty. Avalanche wins on trade-grade build quality. Pick on warranty vs. reliability priority.
Pros
  • MaP 1000g — best-in-class evacuation in mid-tier WaterSense
  • Commercial-grade ceramic + commercial trapway in residential form
  • WaterSense 1.28 GPF + Comfort Height + elongated
  • Lifetime porcelain + 5-year tank trim warranty
  • Universal Korky/Fluidmaster aftermarket parts
  • Strong plumber-trade reputation
  • Made in Mexico at Globe Union facility
  • Top-mount premium chrome trip lever
Cons
  • Limited big-box retail availability (plumbing supply primary)
  • Gerber brand recognition limited among consumers
  • Premium over Glacier Bay All-in-One ($109-$159) — 2x the price
  • Conservative aesthetic (no designer styling)
  • SoftClose seat NOT included
  • Limited color selection

Full Specifications

Brand
Gerber Plumbing
Model Number
21-808
Glaze
Standard vitreous china
Design
Two-piece elongated Comfort Height, commercial-residential bridge build
Map Score
1000
Bowl Shape
Elongated
Flush Type
Gerber ViPER Gravity (3-inch flush valve)
Watersense
1
Ada Compliant
1
Height Inches
16.5
Warranty Years
5
Rough In Inches
12
Gallons Per Flush
1.28
Warranty Porcelain
Lifetime

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