From: muratlanne@gmail.com   
      
   "Morris Dovey"  wrote in message   
   news:jdr68e$ro0$1@speranza.aioe.org...   
   > ...> Shutdown consists of removing power (if still on) from the   
   > pre-ignition heater, closing the first valve to stop the flow of H2 and to   
   > protect the pressure regulator, ...   
   > Morris Dovey   
      
   Can you find a normally-closed valve for that, so the power fail   
   configuration is safe?   
      
   jsw   
      
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