I have toilets that use a pint (or less) per flush[1], and do not suffer from clogs or other issues. Part of the problem is the design of the toilet, where you need the water in the holding tank to &quot;flush&quot; everything past the elbow.<p>[1]<a href="http:&#x2F;&#x2F;www.sun-mar.com&#x2F;prod_flush_seal.html" rel="nofollow">http:&#x2F;&#x2F;www.sun-mar.com&#x2F;prod_flush_seal.html</a>