Contractor Magazine - Latest Comments in Up, Up and awayhttp://contractormag.disqus.com/enWed, 12 Nov 2008 06:06:45 -0000Re: Up, Up and awayhttp://contractormag.com/plumbing/cm_newsarticle_990/#comment-3700918<p>a controller that opens up the extraction valve to expose the waste line to the vacuum. The controller also opens a water valve that releases 0.5-gal to flush and wash down the fixture</p>plumbingWed, 12 Nov 2008 06:06:45 -0000