Delta Foundations Two-Piece Elongated 1.28 GPF Toilet

Model C43913
from Check current price
Check Price on Amazon
Free shipping with Amazon Prime · 30-day returns
Flush Type
Standard
Watersense
1
Gallons Per Flush
1.28

Delta Foundations Two-Piece Elongated 1.28 GPF Toilet Review

Delta Foundations: The Entry-Level Delta Two-Piece for Budget-Constrained Renovations

The Delta Foundations Two-Piece Elongated 1.28 GPF Toilet is Delta's most affordable two-piece — positioned below Hatcher ($149-$199), Conway ($179-$229), and Prelude ($149-$189) as the absolute entry-entry value option in the Delta catalog. At $129-$169 retail at Home Depot, Foundations is among the cheapest brand-name two-piece toilets available in US retail. The Delta brand name on a $129 toilet is unusual — most brand-recognition toilets start at $179+. The trade-off is feature minimalism: traditional profile (not modern), basic flush mechanism, no soft-close seat included, no decorative refinement, and Glossy White only. Foundations is what you buy when budget is the dominant constraint and any acceptable branded toilet will do.

Foundations vs. Other Delta Value Two-Pieces

  • Foundations (this model): $129-$169, traditional profile, no included seat, entry-entry tier
  • Prelude: $149-$189, slight upgrade in tank design, similar feature set, no seat included
  • Hatcher: $149-$199, more refined design language, sometimes includes seat depending on SKU
  • Conway: $179-$229, modern profile, design-focused, soft-close seat typically included
  • Avi: $189-$249, premium modern profile, one-piece-comparable refinement
  • Verano: $219-$279 (one-piece), squared contemporary profile

The price progression from Foundations to Verano covers a $90-$110 range — meaningful in absolute terms but small relative to total bathroom renovation costs. Most renovation buyers should consider stepping up from Foundations to Prelude or Hatcher for the modest price premium and improved design language.

Traditional American Two-Piece Profile

Foundations has traditional American two-piece geometry — tank-on-bowl with visible mounting bolts, traditional bowl curves, no skirted base, no decorative modern elements. The visual language reads utilitarian rather than designer — appropriate for rental properties, secondary bathrooms (basement, garage, mudroom), or budget renovations where toilet aesthetics aren't a priority. For master bathroom or main hallway bathroom installations where aesthetic matters more, step up to Hatcher (slightly more refined traditional) or Conway/Avi (modern profile).

1.28 GPF Single-Flush with FluidMaster

Foundations uses standard 1.28 GPF single-flush operation — WaterSense certified for water conservation, meeting ENERGY STAR water efficiency requirements. The internal flush mechanism uses FluidMaster-licensed components — same parts found across Delta's entire two-piece line and most US value-tier toilets. The practical implication: when fill valve, flush valve, or flapper fails at year 5-10, replacement parts are universally available at any hardware store for $5-$25 total. No Delta-specific parts ordering required for repairs.

  • Fluidmaster 400A fill valve — universal fit, $12-$18
  • Korky 528 flapper — universal fit, $7-$12
  • Fluidmaster Pro45 flush valve — universal fit, $18-$28

Water Savings vs. Older Toilets

Over 5,000 typical annual household flushes, the 1.28 GPF Foundations saves approximately 3,500 gallons annually vs. older 1.6 GPF toilets — about $40-$60/year in water cost savings depending on local water rates. Compared to pre-1992 3.5 GPF toilets (still common in older rental properties), the savings increase to approximately 11,000 gallons annually — $130-$180/year. For rental property landlords replacing older 3.5 GPF toilets across multiple units, the Foundations payback period is measured in months rather than years.

ADA Comfort Height

Foundations' seat height is approximately 17 inches floor-to-rim — within ADA comfort height range. Comfort height is easier for adults, elderly users, and mobility-limited users than older 15-inch "standard height" toilets. Comfort height has been the dominant US toilet standard since 2010.

No Seat Included: The Real Total Cost

Foundations ships without a toilet seat — must purchase separately. This is the most common buyer surprise on this SKU. Budget seat options:

  • Bemis basic round/elongated standard: $15-$25 at Home Depot
  • Bemis soft-close: $25-$45
  • Mayfair (Bemis subsidiary) decorator: $30-$60
  • Delta-spec soft-close seat: $35-$55

Realistic total cost (toilet + seat + installation supplies): $129 + $25 (seat) + $20 (wax ring/bolts) = $174 before plumber labor. The "$129 toilet" becomes a ~$175 toilet by the time it's ready to install.

Specifications

  • Form factor: Two-piece floor-mount, traditional
  • Bowl shape: Elongated
  • Material: Vitreous china
  • Flush volume: 1.28 GPF single-flush
  • Rough-in: 12 inches (standard US residential)
  • Seat height: ~17 inches (ADA comfort height)
  • Seat: Sold separately
  • Color: Glossy White
  • Warranty: Limited lifetime china to original purchaser, 5 years on flushing mechanism
  • MaP rating: 800g
  • Certifications: WaterSense, ADA compliant

Installation

  • Standard 12-inch rough-in fits most US homes built post-1970
  • Cold water supply line — 3/8" or 1/2" compression fitting
  • Wax ring + flange bolts ($15-$25 separate)
  • Tank-to-bowl gasket and mounting bolts included with toilet
  • Bowl installs first, then tank mounted on top — both pieces are single-person lifts
  • Installation labor: 1.5-2 hours for experienced plumber, $150-$350
  • DIY installation feasible for moderately experienced handypeople with adjustable wrench and basic plumbing knowledge

Care and Cleaning

  • Standard porcelain cleaners safe — Lysol Toilet Bowl, Clorox, Soft Scrub with Bleach, Scrubbing Bubbles
  • Pumice stones safe for mineral deposit removal
  • Avoid steel wool and abrasive scrub pads (will scratch glaze)
  • Tank-to-bowl seal area: clean carefully to avoid compromising the rubber gasket
  • Bleach soaks safe (overnight dwell fine)
  • Hard water deposits: CLR or Lime-Away, 10-15 minute dwell, scrub, flush

Pros

  • Aggressive entry-level pricing at $129-$169 — among cheapest brand-name toilets in US retail
  • Delta lifetime china warranty — exceptional for this price tier
  • 5-year flushing mechanism warranty above most competitors at this price
  • 1.28 GPF water-saving design with WaterSense certification
  • FluidMaster internals — universal parts availability for life of toilet
  • ADA comfort height
  • Standard 12-inch rough-in fits most US residential bathrooms
  • Delta brand recognition adds slight resale appeal vs. generic value-tier brands
  • Home Depot store pickup and Pro Xtra trade discount available

Cons

  • No seat included — adds $15-$50 to total cost
  • Traditional profile reads utilitarian rather than designer
  • Only Glossy White available — no warm-tone or modern color alternatives
  • Basic FluidMaster flush — no premium flush refinements or quiet operation
  • Less aesthetic refinement than even slightly more expensive Delta options (Prelude, Hatcher)
  • No decorative or modern profile alternatives
  • Bowl proportions tuned for budget rather than comfort — extended seating less ergonomic than premium two-pieces

Who Should Buy Foundations

  • Rental property landlords seeking lowest-cost branded toilet replacement at scale
  • Budget renovations where toilet aesthetic isn't a priority
  • Secondary bathrooms (basement, garage, mudroom, utility room) with utilitarian function
  • Flip property prep where Delta brand name on Zillow listing matters but cost is constrained
  • Home Depot Pro Xtra trade buyers needing volume orders of budget toilets for multi-unit installations
  • Households replacing pre-1992 3.5 GPF toilets with maximum water savings at minimum capital cost

Who Should Step Up

  • For $30-$80 more: Delta Prelude or Hatcher offers more refined profile and (in some configurations) included soft-close seat
  • For $60-$120 more: Conway or Avi deliver modern profile language
  • For $100-$180 more: Verano one-piece delivers premium aesthetic at one-piece form factor
  • For $200+ more: American Standard Cadet 3 ($199-$249) wins on flush performance (PowerWash + 4-inch flush valve) at modest premium
Pros
  • Modern design
  • Value pricing
Cons
  • Limited brand recognition

Full Specifications

Brand
Delta
Model Number
C43913
Flush Type
Standard
Watersense
1
Gallons Per Flush
1.28

Similar Toilets

TOTO

TOTO Drake II Two-Piece Elongated 1.28 GPF Toilet

1000 Elongated Tornado Flush (Gravity)
Check current price
4.9
View Details
Kohler

Kohler Cimarron Comfort Height Elongated Toilet

800 Elongated AquaPiston (Gravity)
Check current price
4.5
View Details
TOTO

TOTO Drake Two-Piece Elongated 1.28 GPF Toilet

Standard (CeFiONtect available on -CEFG variant) 800 Elongated
Check current price
View Details