I received a call from Steve Jones (Fixerjones) who explained the operation of the Facet in detail. To put is in plain English, the facet must have an anti back flow to be able to pump fuel. Since there is no impeller or diaphragm as in a mechanical pump, the Facet utilizes a pulse operation and the ball acts as a back flow preventer when the pump is operating. It is not a true check valve as it will bleed fuel as some of you have determined by blowing air through it, the amount of seepage is minimal and should not affect operation in a parallel set up as Larry Flesner has well proven. Steve did emphasize the fact that these Facets are very sensitive to trash getting in them and sticking the pump in an open configuration which is not detectable by listening to the pump as it will continue to sound as if it is pulsing. A solution to this is to install 40 micron filters prior to the fuel entering the pump. I have some very simple modifications to do to my dual pump system to make it safer before I fly. THANKS TO ALL who have responded to this thread.
Mark Jones (N886MJ) Wales, WI USA E-mail me at flyk...@wi.rr.com Visit my KR-2S CorvAIRCRAFT web site at http://mywebpage.netscape.com/n886mj/homepage.html
