Expert Advice on Green Buildings

MJSI Hydroright Dual Flush Converter

Product Review provided by: Claire Moloney, Cornell University
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Product Review

MJSI’s Hydroright Dual Converters turn regular toilets into water saving, dual flush toilets. The system, which can be installed in 5-10 minutes without tools, is shown to reduce water usage by 30%.

The Hydroright has won multiple awards, including Top 10 Green Building Products of 2011 from Sustainable Industries magazine and first runner-up for the Home Depot 2010 Merchandising Innovation Award.

Installing the Dual Flush Converter

The Hydroright can be installed in many types of toilets. According to MJSI, the 4 requirements for Hydroright to work properly in your toilet are as follows:

• Newer style fill valve (not the old ball system where there is a ball floating on the water in your tank). If you do need a newer style fill valve, we suggest the HydroClean Toilet Fill Valve, Model 660.

• You must have a round overflow tube.

• The overflow tube must have a height of 6” from base to top.

• Your flush valve opening must be 2 – 2 ½”. If you have a 3” flush valve opening, this product will not work with your current system.

• You must have a 10” clearance in your tank from bottom to top.

You can watch MJSI's video to learn how to install a Dual Flush Converter.

LEED Credit Overview
 

Since the Hydroright Dual Flush Converter can produce significant water savings, it can help to earn LEED points in the Water Efficiency credit category in multiple rating systems.

Since the Dual Flush Converter is ideal for retrofits, it most likely applies to the LEED for Existing Buildings: Operation and Maintenance (LEED EB:O+M) rating system.

In LEED EB:O+M, the Hydroright can help to earn Water Efficiency (WE) Prerequisite 1, Minimum Indoor Plumbing Fixture and Fitting Efficiency (0 points).

However, the Hydroright may help to earn LEED credits in the New Construction 2009 rating system as well. These include:

WE Prerequisite 1, Water Use Reduction (0 points): This requires a 20% reduction in baseline water usage. Since the Hydroright reduces water use by an average of 30%, it can help to earn this credit.

WE Credit 2, Innovative Wastewater Technologies (2 points): This credit aims to reduce demand for potable water by reducing potable water use for sewage by 50% or treating 50% of wastewater to tertiary standards. The Hydroright can help with the first option by reducing the amount of potable water used for sewage.

WE Credit 3, Water Use Reduction (2-4 points): This credit is the same as WE prerequisite 1, except with greater percentages of water reduction. LEED projects can earn 2 points for 30% water use reduction, 3 points for 35% reduction, and 4 points for 40% reduction. Since the Hydroright reduces toilet water use by an average of 30%, it can help to achieve this credit.

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