Gerber Plumbing Fixtures LLC’s Maxwell Dual Flush is the company’s latest high-efficiency toilet (HET). According to the EPA, using a HET product (in place of a standard 1.6 gallon per flush ...

In our tests of single- and dual-flush toilets ... As their name implies, these toilets have a flush valve that relies on gravity. Water drops from the tank into the bowl to move waste down ...

Gerber Plumbing is an industry leader when it comes to efficient toilets. The company has recently enhanced its Ultra Flush line with the addition of an EPA WaterSense approved 1.28 gallons per ...

Dual-flush toilets usually have a mechanical valve with a rubber seal in the cistern that opens to allow water to flow when flushed. That rubber seal can rapidly deteriorate, says Tucker.