This Irvine toilet tank features innovative AquaPiston technology, a patented flush engine that delivers a fast, powerful and virtually plug-free flush. A 1.28-gallon flush provides significant water savings of up to 16,500 gallons per year, compared to a 3.5-gallon toilet, without sacrificing performance. Pair this tank with the K-20148 bowl for a complete Irvine skirted toilet.
- 1.28 gallons per flush (gpf) 
- Standard left-hand Polished Chrome trip lever included 
- Supply line not included 
- Combines with the K-20485 bowl to create a complete K-20450 Irvine toilet 
- Alternative options available: Irvine toilet tank with ContinousClean - K-90097 
- Single-flush gravity uses the force of gravity and a precision-engineered tank, bowl, and trapway to create a strong siphon during flushing 
- AquaPiston canister allows water to flow out of the tank from all sides (360 degrees), increasing the power and effectiveness of the flush 
- Flush valve's 3:2 ratio harnesses the natural force of gravity and optimizes flush performance 
- Durable canister design has 90% less exposed seal material than a 3-inch flapper, for leak-free performance