High Efficiency Toilet (HET) Replacement Program

Bathroom Toilets

According to recent studies presented by the Environmental Protection Agency (EPA), “Environmental, Public, and Consumer Benefits” and other notable related organizations, the average indoor potable water consumption in households can be decreased by more than 30% or more when water efficient toilets, showers, faucets, dish washers, and washing machines are used. Practicing efficient, non-excessive, use of water resources is crucial to the environment and saves each household money. Moreover, water conservation practices can offset demand and ease water restrictions during times of drought. Potable water production decreases while a household’s water bill savings rise. 

Graph of Toilet Water Consumption

Depending on its flush rate, a toilet can account for more than 16% to 24% of a household’s total indoor water consumption. A high-efficiency toilet can reduces the toilet water consumption by over 50%. This can add up to a total savings of 15,000 to 20,000 gallons per year in a household of four. 

Toilets play a big role in indoor water consumption, but it is also important to remember that Fixing leaks, water efficient showers, dishwaters and laundry washing machines are also part of conserving water. By following State of Hawaii and Maui County Code (MCC) laws and guidelines, DWS is committed to promoting water conservation awareness to the community and helping DWS customers save money. 

Plumbing Code

Maui County Ordinance Number 2108, a Bill for an Ordinance Amending Maui County Code 16.20.675 Section 1050.

Pertaining to the Plumbing Code took effect on December 31, 1992. This ordinance establishes a maximum rate of water flow or discharges for plumbing fixtures and devices in order to promote water conservation. These devices include:

  • Faucets (kitchen and bathroom)
  • Hose bibs
  • Showerheads
  • Urinals
  • Toilets

The maximum flow for toilets under the guideline is 1.6 gallons per flush, but there are now even more efficient toilets available today. To assist DWS customers, DWS has established the Toilet Replacement Program and also provides some fixtures mentioned above to DWS customers at no cost.

Dual Flush HET toilet

Under the new DWS HET Toilet Replacement Program, the public may choose to replace older qualifying toilets with new, Dual Flush HET toilets. The toilet has a dual flush with high-performance gravity 0.8/1.28 gallon per flush (gpf). The toilet bowl is ADA height compliant for residential installations. It is a Standard size being 16 ½ inches in Height by 14 inches in Width and 24 inches in Depth. Please measure to ensure that these dimensions work in your bathroom.

Restrictions Apply

Restrictions apply and toilet replacements are currently only available to single-family residential DWS customers.

Qualifying for a UHET Replacement

*UPDATE: Due to COVID-19, we have suspended distribution for this program until further notice. Please continue to apply for the Toilet Replacement Program "Since giveaways are on a first come, first serve basis, you will only be notified with instructions on how to receive your Toilet once your application is processed".

Read the full Program Rules and Guidelines (PDF) to find out if you qualify for a HET replacement. Additional Questions and Answers are provided at the end of the Program Rules and Guidelines document.


Submit an application. Selected participants will be notified via email within 1 to 2 weeks of submitting their online application.