Index: firmware/App/Controllers/PermeateTank.c
===================================================================
diff -u -r2475e55c224cbd841d61b76f1618451efe6be1f5 -rd3e727d1ac6d0aa9e73f703e1bd8bde830a02bd6
--- firmware/App/Controllers/PermeateTank.c	(.../PermeateTank.c)	(revision 2475e55c224cbd841d61b76f1618451efe6be1f5)
+++ firmware/App/Controllers/PermeateTank.c	(.../PermeateTank.c)	(revision d3e727d1ac6d0aa9e73f703e1bd8bde830a02bd6)
@@ -378,7 +378,7 @@
 
         case PERMEATE_TANK_FULL_STATE:
             setValveState( M4_VALV, VALVE_STATE_CLOSED );
-            setValveState( M12_VALV, VALVE_STATE_CLOSED );
+            setValveState( M12_VALV, VALVE_STATE_OPEN );
             setValveState( P6_VALV, VALVE_STATE_OPEN );
             setValveState( P11_VALV, VALVE_STATE_OPEN );
             setValveState( P33_VALV, VALVE_STATE_OPEN );