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High Efficiency Toilet Rebate

CWLP water customers who replace an existing older toilet with a qualifying new high-efficiency (HE) toilet can apply for a $50 rebate from CWLP. (New construction does not qualify for the rebate.) The new toilet must bear a WaterSense® label, which indicates it will use at least 20 percent less water than the current federal standard of 1.6 gallons per flush while providing equal or superior flushing performance to standard models.

How to Get Your High-Efficiency Toilet Rebate

  • Purchase your qualifying HE toilet.
  • Complete your HE Toilet Rebate application and print it out (or print it out first and complete it by hand).
  • Mail or bring your rebate application, with your purchase receipt, within 60 days of purchase to:
    CWLP Energy Services Office
    1008 E. Miller Street
    Springfield, IL 62702

HE Toilet Rebate Printable Form
NOTE: To electronically submit this PDF from Google Chrome browser, you will need to use the Adobe extension. You can download and install the extension: open in Internet Explorer; email the form to; or print and mail the pdf to CWLP Energy Services, 1008 E. Miller St., Springfield, IL 62702.

One rebate is allowed per water account. Your rebate will be applied as a credit to your CWLP bill once the information on the application has been verified. Please allow up to 45 days for rebate processing.

For more information about CWLP's High-Efficiency Toilet Rebate, contact the CWLP Energy Services Office by phone at 217.789.2070 or by email (

WaterSense HE Toilet Benefits

Toilets manufactured before 1980 for residential use typically used up to 5 gallons of water per flush, while those manufactured between 1980 and 1994 used up to 3.5 gallons. Federal water conservation standards have required toilets manufactured since 1994 to use no more than 1.6 gallons per flush. Therefore, by replacing a 20- to 30-year-old toilet with one that now meets standard-efficiency requirements, you could save up to almost 3,000 gallons of water per year for every person who regularly uses that toilet.

But a WaterSense-labeled high-efficiency toilet would save you even more—up to an additional 0.6 gallons per flush. (Toilets bearing the WaterSense label use 1.28 gallons or less per flush.) This means that, depending on the technology style you choose (dual-flush, pressure-assist, single-flush gravity, or flushometer valve), by replacing your old toilet with a WaterSense-labeled HE Toilet instead of a new standard-efficiency (1.6 gallon-per-flush) model, you could save approximately 600 to 1,100 more gallons per year for every person who regularly uses that toilet.

How they work

Saving water does not mean sacrificing flushing performance. Today's high-efficiency toilets are far superior to the low-flow toilets of the early 1990s, which sometimes needed to be double- or triple-flushed. And you can be sure that a toilet bearing the WaterSense label will incorporate only the best of modern toilet technologies.

The most common types of HE Toilets in use in the U.S. today are dual-flush and pressure-assist models. The dual-flush high-efficiency toilet is a gravity flush unit that saves water by offering different flush volumes: a full 1.6 gallon flush for solids and a half-flush (0.8 gallons) for liquids. The pressure-assist HET has a seated compartment inside the tank that contains air and becomes pressurized when water from the supply line fills the compartment. When the flush button is pressed, pressurized air exerts force on the water in the compartment and shoots it into the bowl. The pressure-assist fixture creates a fast flush accompanied by a "whooshing" sound. Although slightly louder than standard toilets, these units make up for the extra noise in water savings, using just under one gallon of water per flush.