diff --git a/src/main/java/gregtech/common/tileentities/machines/basic/GT_MetaTileEntity_Pump.java b/src/main/java/gregtech/common/tileentities/machines/basic/GT_MetaTileEntity_Pump.java
index 4b410407..f91ce480 100644
--- a/src/main/java/gregtech/common/tileentities/machines/basic/GT_MetaTileEntity_Pump.java
+++ b/src/main/java/gregtech/common/tileentities/machines/basic/GT_MetaTileEntity_Pump.java
@@ -183,7 +183,7 @@ public class GT_MetaTileEntity_Pump extends GT_MetaTileEntity_Hatch {
         if (yHead <= 0) {
             return false;
         }
-        if ((!consumeFluid(getBaseMetaTileEntity().getXCoord(), yHead - 1, getBaseMetaTileEntity().getZCoord())) && (!getBaseMetaTileEntity().getAir(getBaseMetaTileEntity().getXCoord(), yHead - 1, getBaseMetaTileEntity().getZCoord()))) {
+        if ((!consumeFluid(getBaseMetaTileEntity().getXCoord(), yHead - 1, getBaseMetaTileEntity().getZCoord())) && (!getBaseMetaTileEntity().getBlock(getBaseMetaTileEntity().getXCoord(), yHead - 1, getBaseMetaTileEntity().getZCoord()).isAir(getBaseMetaTileEntity().getWorld(), getBaseMetaTileEntity().getXCoord(), yHead - 1, getBaseMetaTileEntity().getZCoord()))) {
             return false;
         }
         if (!GT_Utility.setBlockByFakePlayer(getFakePlayer(getBaseMetaTileEntity()), getBaseMetaTileEntity().getXCoord(), yHead - 1, getBaseMetaTileEntity().getZCoord(), MINING_PIPE_TIP_BLOCK, 0, false)) {
diff --git a/src/main/java/gregtech/common/tileentities/machines/multi/GT_MetaTileEntity_ConcreteBackfillerBase.java b/src/main/java/gregtech/common/tileentities/machines/multi/GT_MetaTileEntity_ConcreteBackfillerBase.java
index a285f136..73795647 100644
--- a/src/main/java/gregtech/common/tileentities/machines/multi/GT_MetaTileEntity_ConcreteBackfillerBase.java
+++ b/src/main/java/gregtech/common/tileentities/machines/multi/GT_MetaTileEntity_ConcreteBackfillerBase.java
@@ -92,8 +92,7 @@ public abstract class GT_MetaTileEntity_ConcreteBackfillerBase extends GT_MetaTi
     
 	private boolean isRefillableBlock(int aX, int aY, int aZ){
 		IGregTechTileEntity aBaseTile = getBaseMetaTileEntity();
-		if (aBaseTile.getTileEntity(aX, aY, aZ) != null) return false;
-		if (!aBaseTile.getAir(aX, aY, aZ) && aBaseTile.getBlock(aX, aY, aZ).getMaterial().isSolid()) return false;
+		if (!aBaseTile.getBlock(aX, aY, aZ).isAir(aBaseTile.getWorld(), aX, aY, aZ) || aBaseTile.getBlock(aX, aY, aZ).getMaterial().isSolid()) return false;
 		if (!GT_Utility.setBlockByFakePlayer(getFakePlayer(aBaseTile), aX, aY, aZ, GregTech_API.sBlockConcretes, 8, true)) return false;
 		return true;
 	}