Take from inventory if no bucket is in the system

src/main/java/refinedstorage/apiimpl/network/grid/FluidGridHandler.java

@@ -11,10 +11,13 @@ import net.minecraftforge.fluids.capability.IFluidHandler;
 import refinedstorage.api.network.INetworkMaster;
 import refinedstorage.api.network.NetworkUtils;
 import refinedstorage.api.network.grid.IFluidGridHandler;
+import refinedstorage.api.storage.CompareUtils;
 
 import javax.annotation.Nullable;
 
 public class FluidGridHandler implements IFluidGridHandler {
+    private static final ItemStack EMPTY_BUCKET = new ItemStack(Items.BUCKET);
+
     private INetworkMaster network;
 
     public FluidGridHandler(INetworkMaster network) {
@@ -26,7 +29,21 @@ public class FluidGridHandler implements IFluidGridHandler {
         FluidStack stack = network.getFluidStorage().get(hash);
 
         if (stack != null) {
-            ItemStack bucket = NetworkUtils.extractItem(network, new ItemStack(Items.BUCKET), 1);
+            ItemStack bucket = NetworkUtils.extractItem(network, EMPTY_BUCKET, 1);
+
+            if (bucket == null) {
+                for (int i = 0; i < player.inventory.getSizeInventory(); ++i) {
+                    ItemStack slot = player.inventory.getStackInSlot(i);
+
+                    if (CompareUtils.compareStack(EMPTY_BUCKET, slot)) {
+                        bucket = slot;
+
+                        player.inventory.setInventorySlotContents(i, null);
+
+                        break;
+                    }
+                }
+            }
 
             if (bucket != null) {
                 bucket.getCapability(CapabilityFluidHandler.FLUID_HANDLER_CAPABILITY, null).fill(NetworkUtils.extractFluid(network, stack, 1000), true);

src/main/java/refinedstorage/gui/grid/GuiGrid.java

@@ -30,7 +30,6 @@ import refinedstorage.integration.jei.IntegrationJEI;
 import refinedstorage.network.*;
 import refinedstorage.tile.grid.IGrid;
 import refinedstorage.tile.grid.TileGrid;
-import refinedstorage.tile.grid.WirelessGrid;
 
 import java.io.IOException;
 import java.util.ArrayList;
@@ -269,7 +268,7 @@ public class GuiGrid extends GuiBase {
 
     @Override
     public void drawForeground(int mouseX, int mouseY) {
-        drawString(7, 7, t(grid instanceof WirelessGrid ? "gui.refinedstorage:wireless_grid" : "gui.refinedstorage:grid"));
+        drawString(7, 7, t(grid.getGuiTitle()));
         drawString(7, (grid.getType() == EnumGridType.CRAFTING || grid.getType() == EnumGridType.PATTERN) ? 153 : 114, t("container.inventory"));
 
         int x = 8;

src/main/java/refinedstorage/proxy/CommonProxy.java

@@ -252,6 +252,15 @@ public class CommonProxy {
             new ItemStack(RefinedStorageItems.PATTERN)
         ));
 
+        // Fluid Grid
+        RefinedStorageAPI.SOLDERER_REGISTRY.addRecipe(new SoldererRecipeBasic(
+            new ItemStack(RefinedStorageBlocks.GRID, 1, EnumGridType.FLUID.getId()),
+            500,
+            new ItemStack(RefinedStorageItems.PROCESSOR, 1, ItemProcessor.TYPE_ADVANCED),
+            new ItemStack(RefinedStorageBlocks.GRID, 1, EnumGridType.FLUID.getId()),
+            new ItemStack(Items.BUCKET)
+        ));
+
         // Wireless Grid
         GameRegistry.addRecipe(new ItemStack(RefinedStorageItems.WIRELESS_GRID, 1, ItemWirelessGrid.TYPE_NORMAL),
             "EPE",

src/main/java/refinedstorage/tile/grid/IGrid.java

@@ -19,6 +19,8 @@ public interface IGrid {
 
     IFluidGridHandler getFluidHandler();
 
+    String getGuiTitle();
+
     int getViewType();
 
     int getSortingType();

src/main/java/refinedstorage/tile/grid/TileGrid.java

@@ -209,6 +209,11 @@ public class TileGrid extends TileNode implements IGrid {
         return isConnected() ? network.getFluidGridHandler() : null;
     }
 
+    @Override
+    public String getGuiTitle() {
+        return getType() == EnumGridType.FLUID ? "gui.refinedstorage:fluid_grid" : "gui.refinedstorage:grid";
+    }
+
     public InventoryCrafting getMatrix() {
         return matrix;
     }

src/main/java/refinedstorage/tile/grid/WirelessGrid.java

@@ -96,6 +96,11 @@ public class WirelessGrid implements IGrid {
         return null;
     }
 
+    @Override
+    public String getGuiTitle() {
+        return "gui.refinedstorage:wireless_grid";
+    }
+
     @Override
     public int getViewType() {
         return viewType;

src/main/resources/assets/refinedstorage/lang/en_US.lang

@@ -7,6 +7,7 @@ gui.refinedstorage:grid=Grid
 gui.refinedstorage:grid.craft=Craft
 gui.refinedstorage:grid.pattern_create=Create Pattern
 gui.refinedstorage:wireless_grid=Wireless Grid
+gui.refinedstorage:fluid_grid=Fluid Grid
 gui.refinedstorage:disk_drive=Drive
 gui.refinedstorage:external_storage=External Storage
 gui.refinedstorage:importer=Importer