set fluid conduit default to output only

src/main/java/crazypants/enderio/conduit/liquid/AbstractLiquidConduit.java

@@ -157,11 +157,11 @@ public abstract class AbstractLiquidConduit extends AbstractConduit implements I
         boolean res;
         if (mode == RedstoneControlMode.OFF) {
             // if checking for no signal, must be no signal from both
-            res = mode.isConditionMet(mode, signal)
+            res = RedstoneControlMode.isConditionMet(mode, signal)
                     && (col != DyeColor.RED || isConditionMetByExternalSignal(dir, mode, col));
         } else {
             // if checking for a signal, either is fine
-            res = mode.isConditionMet(mode, signal)
+            res = RedstoneControlMode.isConditionMet(mode, signal)
                     || (col == DyeColor.RED && isConditionMetByExternalSignal(dir, mode, col));
         }
         return res;
@@ -180,7 +180,12 @@ public abstract class AbstractLiquidConduit extends AbstractConduit implements I
             }
         }
 
-        return mode.isConditionMet(mode, externalSignal);
+        return RedstoneControlMode.isConditionMet(mode, externalSignal);
+    }
+
+    @Override
+    protected ConnectionMode getDefaultConnectionMode() {
+        return ConnectionMode.INPUT;
     }
 
     @Override