Studies Overview

As part of an on-going dedication to educating people about environmentally sound plumbing, MJSI frequently updates this page with new materials and resources that we believe will to be timely and informative.

HydroRight™ Dual Flush Converter Proven to Save 30% of Overall Indoor Water Usage

Veritec Consulting, Inc.

Veritec Consulting conducted a study for Equity Residential, Moen and MJSI that was intended to reduce water demands in an apartment complex by retrofitting existing plumbing fixtures with water-saving plumbing products. The intent of the project was to quantify the water savings achieved when each product was installed separately as well as when all the products were installed together. This Technical Bulletin examines the results of the HydroRight Dual Flush Converter and the HydroClean® Toilet Fill Valve.

Toilet Flappers

The Weak Link of Water Conservation
By John Koeller, P.E.

Summary: The study was done to explore the flapper as an underestimated source of leakage and inefficiency. Specifically, it quantifies leaking due to flapper warping and corrosion. It also provides information regarding the negative effects of pairing a toilet with the incorrect after-market replacement flapper.

Study Finds 36% Water Savings with HydroClean® Toilet Fill Valve

Veritec Consulting, Inc.

Summary: This study was conducted as part of the Region of Halton’s (Ontario, Canada) on-going water efficiency initiative to determine the amount of water saved following the installation of the HydroClean toilet fill valve in a 159-unit condominium complex. Bill Gauley, Veritec Consulting and the developer of the de facto toilet performance standards that form the basis of the USEPA's WaterSense program, led the study.

Tampa Water Department Residential Water Conservation Study

The Impacts of High Efficiency Plumbing Retrofits in Single-Family Homes

Prepared By Peter W. Mayer, William B. DeOreo, Erin Towler, Leslie Martien, and David M. Lewis Submitted to the Tampa Water Department and the United States Environmental Protection Agency.

Summary: Measurements of water use in a sample were taken for every water using appliance in the home. The homes were then supplied with high-efficiency retrofit devices. Measurements were again taken six months later and the difference in water use was recorded.

Ultra-Low Flow Toilet Flapper Marketing and Implementation Strategies Program

Prepared for Tampa Bay Water in cooperation with Southwest Florida Water Management District

Summary: Literature designed to provide consumers with the awareness that replacing a toilet flapper with the incorrect replacement flapper can lead to large amounts of waste. Included are verifications of the fact that this inefficiency affects even low-flush toilets and a list of proper flapper replacements for a large number of makes and models of toilets.