diff --git a/src/main/java/mekanism/client/gui/GuiGasTank.java b/src/main/java/mekanism/client/gui/GuiGasTank.java
index 30f368837..c4a12e9e0 100644
--- a/src/main/java/mekanism/client/gui/GuiGasTank.java
+++ b/src/main/java/mekanism/client/gui/GuiGasTank.java
@@ -2,6 +2,8 @@ package mekanism.client.gui;
 
 import java.util.ArrayList;
 
+import cpw.mods.fml.relauncher.Side;
+import cpw.mods.fml.relauncher.SideOnly;
 import mekanism.api.Coord4D;
 import mekanism.client.sound.SoundHandler;
 import mekanism.common.Mekanism;
@@ -11,12 +13,8 @@ import mekanism.common.tile.TileEntityGasTank;
 import mekanism.common.util.MekanismUtils;
 import mekanism.common.util.MekanismUtils.ResourceType;
 import net.minecraft.entity.player.InventoryPlayer;
-
 import org.lwjgl.opengl.GL11;
 
-import cpw.mods.fml.relauncher.Side;
-import cpw.mods.fml.relauncher.SideOnly;
-
 @SideOnly(Side.CLIENT)
 public class GuiGasTank extends GuiMekanism
 {
@@ -37,17 +35,18 @@ public class GuiGasTank extends GuiMekanism
 
 		String capacityInfo = tileEntity.gasTank.getStored() + "/" + tileEntity.MAX_GAS;
 
-		fontRendererObj.drawString(tileEntity.getInventoryName(), (xSize/2)-(fontRendererObj.getStringWidth(tileEntity.getInventoryName())/2), 6, 0x404040);
+		fontRendererObj.drawString(tileEntity.getInventoryName(), (xSize / 2) - (fontRendererObj.getStringWidth(tileEntity.getInventoryName()) / 2), 6, 0x404040);
 		fontRendererObj.drawString(capacityInfo, 45, 40, 0x404040);
 		fontRendererObj.drawString(MekanismUtils.localize("gui.gas") + ": " + (tileEntity.gasTank.getGas() != null ? tileEntity.gasTank.getGas().getGas().getLocalizedName() : MekanismUtils.localize("gui.none")), 45, 49, 0x404040);
 		fontRendererObj.drawString(MekanismUtils.localize("container.inventory"), 8, ySize - 96 + 2, 0x404040);
 
-		String name = tileEntity.dumping ? MekanismUtils.localize("gui.dumping") + "..." : MekanismUtils.localize("gui.idle");
-		fontRendererObj.drawString(name, 156-fontRendererObj.getStringWidth(name), 73, 0x404040);
+		String name = chooseByMode(tileEntity.dumping, MekanismUtils.localize("gui.idle"), MekanismUtils.localize("gui.dumping"), MekanismUtils.localize("gui.dumping_excess"));
+		fontRendererObj.drawString(name, 156 - fontRendererObj.getStringWidth(name), 73, 0x404040);
 
 		super.drawGuiContainerForegroundLayer(mouseX, mouseY);
 	}
 
+
 	@Override
 	protected void drawGuiContainerBackgroundLayer(float partialTick, int mouseX, int mouseY)
 	{
@@ -59,7 +58,7 @@ public class GuiGasTank extends GuiMekanism
 		int guiHeight = (height - ySize) / 2;
 		drawTexturedModalRect(guiWidth, guiHeight, 0, 0, xSize, ySize);
 
-		int displayInt = tileEntity.dumping ? 18 : 10;
+		int displayInt = chooseByMode(tileEntity.dumping, 10, 18, 26);
 		drawTexturedModalRect(guiWidth + 160, guiHeight + 73, 176, displayInt, 8, 8);
 
 		if(tileEntity.gasTank.getGas() != null)
@@ -86,4 +85,21 @@ public class GuiGasTank extends GuiMekanism
 			SoundHandler.playSound("gui.button.press");
 		}
 	}
+
+	private <T> T chooseByMode(TileEntityGasTank.Mode dumping, T idleOption, T dumpingOption, T dumpingExcessOption)
+	{
+		if(dumping.equals(TileEntityGasTank.Mode.IDLE))
+		{
+			return idleOption;
+		}
+		if(dumping.equals(TileEntityGasTank.Mode.DUMPING))
+		{
+			return dumpingOption;
+		}
+		if(dumping.equals(TileEntityGasTank.Mode.DUMPING_EXCESS))
+		{
+			return dumpingExcessOption;
+		}
+		return idleOption; //should not happen;
+	}
 }
diff --git a/src/main/java/mekanism/common/tile/TileEntityGasTank.java b/src/main/java/mekanism/common/tile/TileEntityGasTank.java
index 9a074d45c..6944c9eae 100644
--- a/src/main/java/mekanism/common/tile/TileEntityGasTank.java
+++ b/src/main/java/mekanism/common/tile/TileEntityGasTank.java
@@ -1,9 +1,8 @@
 package mekanism.common.tile;
 
-import io.netty.buffer.ByteBuf;
-
 import java.util.ArrayList;
 
+import io.netty.buffer.ByteBuf;
 import mekanism.api.Coord4D;
 import mekanism.api.gas.Gas;
 import mekanism.api.gas.GasRegistry;
@@ -26,6 +25,13 @@ import net.minecraftforge.common.util.ForgeDirection;
 
 public class TileEntityGasTank extends TileEntityContainerBlock implements IGasHandler, ITubeConnection, IRedstoneControl
 {
+	public enum Mode
+	{
+		IDLE,
+		DUMPING,
+		DUMPING_EXCESS
+	}
+
 	/** The type of gas stored in this tank. */
 	public GasTank gasTank = new GasTank(MAX_GAS);
 
@@ -34,7 +40,7 @@ public class TileEntityGasTank extends TileEntityContainerBlock implements IGasH
 	/** How fast this tank can output gas. */
 	public int output = 256;
 
-	public boolean dumping;
+	public Mode dumping;
 
 	/** This machine's current RedstoneControl type. */
 	public RedstoneControl controlType;
@@ -43,6 +49,7 @@ public class TileEntityGasTank extends TileEntityContainerBlock implements IGasH
 	{
 		super("GasTank");
 		inventory = new ItemStack[2];
+		dumping = Mode.IDLE;
 		controlType = RedstoneControl.DISABLED;
 	}
 
@@ -74,10 +81,15 @@ public class TileEntityGasTank extends TileEntityContainerBlock implements IGasH
 			}
 		}
 
-		if(!worldObj.isRemote && dumping)
+		if(!worldObj.isRemote && dumping.equals(Mode.DUMPING))
 		{
 			gasTank.draw(8, true);
 		}
+
+		if(!worldObj.isRemote && dumping.equals(Mode.DUMPING_EXCESS) && gasTank.getNeeded() < output)
+		{
+			gasTank.draw(output, true);
+		}
 	}
 
 	@Override
@@ -90,7 +102,7 @@ public class TileEntityGasTank extends TileEntityContainerBlock implements IGasH
 		else if(slotID == 0)
 		{
 			return (itemstack.getItem() instanceof IGasItem && ((IGasItem)itemstack.getItem()).getGas(itemstack) != null &&
-					((IGasItem)itemstack.getItem()).getGas(itemstack).amount == ((IGasItem)itemstack.getItem()).getMaxGas(itemstack));
+			    ((IGasItem)itemstack.getItem()).getGas(itemstack).amount == ((IGasItem)itemstack.getItem()).getMaxGas(itemstack));
 		}
 
 		return false;
@@ -114,7 +126,7 @@ public class TileEntityGasTank extends TileEntityContainerBlock implements IGasH
 	@Override
 	public int[] getAccessibleSlotsFromSide(int side)
 	{
-		return side == 1 ? new int[] {0} : new int[] {1};
+		return side == 1 ? new int[]{0} : new int[]{1};
 	}
 
 	@Override
@@ -155,7 +167,8 @@ public class TileEntityGasTank extends TileEntityContainerBlock implements IGasH
 
 			if(type == 0)
 			{
-				dumping = !dumping;
+				int index = (dumping.ordinal() + 1)%dumping.values().length;
+				dumping = Mode.values()[index];
 			}
 
 			for(EntityPlayer player : playersUsing)
@@ -172,11 +185,12 @@ public class TileEntityGasTank extends TileEntityContainerBlock implements IGasH
 		{
 			gasTank.setGas(new GasStack(GasRegistry.getGas(dataStream.readInt()), dataStream.readInt()));
 		}
-		else {
+		else
+		{
 			gasTank.setGas(null);
 		}
 
-		dumping = dataStream.readBoolean();
+		dumping = Mode.values()[dataStream.readInt()];
 		controlType = RedstoneControl.values()[dataStream.readInt()];
 
 		MekanismUtils.updateBlock(worldObj, xCoord, yCoord, zCoord);
@@ -188,7 +202,22 @@ public class TileEntityGasTank extends TileEntityContainerBlock implements IGasH
 		super.readFromNBT(nbtTags);
 
 		gasTank.read(nbtTags.getCompoundTag("gasTank"));
-		dumping = nbtTags.getBoolean("dumping");
+		if(nbtTags.hasKey("dumpingMode"))
+		{
+			dumping = Mode.valueOf(nbtTags.getString("dumpingMode"));
+		}
+		else //For backwards compatibility
+		{
+			boolean dumpingBool = nbtTags.getBoolean("dumping");
+			if(dumpingBool)
+			{
+				dumping = Mode.DUMPING;
+			}
+			else
+			{
+				dumping = Mode.IDLE;
+			}
+		}
 		controlType = RedstoneControl.values()[nbtTags.getInteger("controlType")];
 	}
 
@@ -198,7 +227,7 @@ public class TileEntityGasTank extends TileEntityContainerBlock implements IGasH
 		super.writeToNBT(nbtTags);
 
 		nbtTags.setTag("gasTank", gasTank.write(new NBTTagCompound()));
-		nbtTags.setBoolean("dumping", dumping);
+		nbtTags.setString("dumpingMode", dumping.name());
 		nbtTags.setInteger("controlType", controlType.ordinal());
 	}
 
@@ -213,11 +242,12 @@ public class TileEntityGasTank extends TileEntityContainerBlock implements IGasH
 			data.add(gasTank.getGas().getGas().getID());
 			data.add(gasTank.getStored());
 		}
-		else {
+		else
+		{
 			data.add(false);
 		}
 
-		data.add(dumping);
+		data.add(dumping.ordinal());
 		data.add(controlType.ordinal());
 
 		return data;
diff --git a/src/main/resources/assets/mekanism/gui/GuiGasTank.png b/src/main/resources/assets/mekanism/gui/GuiGasTank.png
index 5308566c1..8ea40c543 100644
Binary files a/src/main/resources/assets/mekanism/gui/GuiGasTank.png and b/src/main/resources/assets/mekanism/gui/GuiGasTank.png differ
diff --git a/src/main/resources/assets/mekanism/lang/de_DE.lang b/src/main/resources/assets/mekanism/lang/de_DE.lang
index fea0d843d..481effd6e 100644
--- a/src/main/resources/assets/mekanism/lang/de_DE.lang
+++ b/src/main/resources/assets/mekanism/lang/de_DE.lang
@@ -338,6 +338,7 @@ gui.newFilter=Neuer Filter
 gui.energy=Energie
 gui.gas=Gas
 gui.dumping=Ausleeren
+gui.dumping_excess=Ausleeren Über
 gui.modID=Mod-ID
 gui.key=Key
 gui.id=ID
diff --git a/src/main/resources/assets/mekanism/lang/en_US.lang b/src/main/resources/assets/mekanism/lang/en_US.lang
index 40571741e..a53c846a4 100644
--- a/src/main/resources/assets/mekanism/lang/en_US.lang
+++ b/src/main/resources/assets/mekanism/lang/en_US.lang
@@ -338,6 +338,7 @@ gui.newFilter=New Filter
 gui.energy=Energy
 gui.gas=Gas
 gui.dumping=Dumping
+gui.dumping_excess=Dumping Excess
 gui.modID=Mod ID
 gui.key=Key
 gui.id=ID