Gerber Plumbing Ultra Flush Pressure Assisted 1.0/1.28/1.6 GPF Back-Outlet Elongated Toilet Bowl Only in White

Item # 309005926 | Gerber Plumbing Fixtures Part # GUF21375 | UPC Code 671052656516 | UNSPSC Code 30181511 | Catalog Page #291
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Product Overview

Harness the power of the ultimate flushing machine with an Ultra Flush 1.0/1.1/1.28/1.6 GPF Pressure Assist Toilet. Boasting top of the line professional performance, its unique rim provides complete rinsing coverage with every flush. The tank uses a pressure vessel which releases compressed air in a downward path and forces water into the bowl, pushing waste out through our extra-large 3 in. trapway. An exclusive six-point tank to bowl mounting system creates precise contact for superior stability and is designed to be tightened without tools.

  • Use with Gerber tanks, models: GRF28380, 28380, and GUF28380
  • 17 in.Tall, ErgoHeight, ADA Elongated, Floor Mounted, Back-Outlet Bowl for installation to in-wall plumbing with added comfort
  • 2 in. fully glazed trapway for clog-free waste removal
  • Dual fed siphon jets increases the speed and power of the flush, for a quick and clean bowl everytime
  • Generous water surface to thoroughly rinse bowl with each flush
  • 1.0 GPF, 1.28GPF, and 1.6GPF
  • Drain line carry 80 feet
  • Industry map rating: 1250g
  • 4.25 in. Veridical Rough-In
  • Toilet seat not included
  • WaterSense certified, Ultra High Efficiency Toilet (UHET) to save over 30% more water (vs 1.6 gpf/6 Lpf toilet) and money!
  • Limited Lifetime on Vitreous China, refer to attached warranty for more details
  • cUPC certified, meets CSA and UPC certification standards


Bath Product Type
Toilet Bowl
Bowl Shape
Certifications and Listings
ADA Compliant, ASME Certified, EPA Approved, IAPMO Certified
No Additional Items Included
Manufacturer Warranty
Limited Lifetime Warranty
Vitreous China
Product Depth (in.)
Product Height (in.)
Product Weight (lb.)
Product Width (in.)
Standard Color Family


Limited Lifetime Warranty