craftbukkit/nms-patches/net/minecraft/world/level/block/entity/TileEntityConduit.patch

--- a/net/minecraft/world/level/block/entity/TileEntityConduit.java
+++ b/net/minecraft/world/level/block/entity/TileEntityConduit.java
@@ -28,6 +28,10 @@
 import net.minecraft.world.phys.AxisAlignedBB;
 import net.minecraft.world.phys.Vec3D;
 
+// CraftBukkit start
+import net.minecraft.server.level.WorldServer;
+// CraftBukkit end
+
 public class TileEntityConduit extends TileEntity {
 
     private static final int BLOCK_REFRESH_RATE = 2;
@@ -187,8 +191,20 @@
     }
 
     private static void applyEffects(World world, BlockPosition blockposition, List<BlockPosition> list) {
+        // CraftBukkit start
+        applyEffects(world, blockposition, getRange(list));
+    }
+
+    public static int getRange(List<BlockPosition> list) {
+        // CraftBukkit end
         int i = list.size();
         int j = i / 7 * 16;
+        // CraftBukkit start
+        return j;
+    }
+
+    private static void applyEffects(World world, BlockPosition blockposition, int j) { // j = effect range in blocks
+        // CraftBukkit end
         int k = blockposition.getX();
         int l = blockposition.getY();
         int i1 = blockposition.getZ();
@@ -202,7 +218,7 @@
                 EntityHuman entityhuman = (EntityHuman) iterator.next();
 
                 if (blockposition.closerThan(entityhuman.blockPosition(), (double) j) && entityhuman.isInWaterOrRain()) {
-                    entityhuman.addEffect(new MobEffect(MobEffects.CONDUIT_POWER, 260, 0, true, true));
+                    entityhuman.addEffect(new MobEffect(MobEffects.CONDUIT_POWER, 260, 0, true, true), org.bukkit.event.entity.EntityPotionEffectEvent.Cause.CONDUIT); // CraftBukkit
                 }
             }
 
@@ -210,6 +226,12 @@
     }
 
     private static void updateDestroyTarget(World world, BlockPosition blockposition, IBlockData iblockdata, List<BlockPosition> list, TileEntityConduit tileentityconduit) {
+        // CraftBukkit start - add "damageTarget" boolean
+        updateDestroyTarget(world, blockposition, iblockdata, list, tileentityconduit, true);
+    }
+
+    public static void updateDestroyTarget(World world, BlockPosition blockposition, IBlockData iblockdata, List<BlockPosition> list, TileEntityConduit tileentityconduit, boolean damageTarget) {
+        // CraftBukkit end
         EntityLiving entityliving = tileentityconduit.destroyTarget;
         int i = list.size();
 
@@ -230,9 +252,12 @@
             tileentityconduit.destroyTarget = null;
         }
 
-        if (tileentityconduit.destroyTarget != null) {
-            world.playSound((EntityHuman) null, tileentityconduit.destroyTarget.getX(), tileentityconduit.destroyTarget.getY(), tileentityconduit.destroyTarget.getZ(), SoundEffects.CONDUIT_ATTACK_TARGET, SoundCategory.BLOCKS, 1.0F, 1.0F);
-            tileentityconduit.destroyTarget.hurt(world.damageSources().magic(), 4.0F);
+        // CraftBukkit start
+        if (damageTarget && tileentityconduit.destroyTarget != null) {
+            if (tileentityconduit.destroyTarget.hurtServer((WorldServer) world, world.damageSources().magic().directBlock(world, blockposition), 4.0F)) {
+                world.playSound(null, tileentityconduit.destroyTarget.getX(), tileentityconduit.destroyTarget.getY(), tileentityconduit.destroyTarget.getZ(), SoundEffects.CONDUIT_ATTACK_TARGET, SoundCategory.BLOCKS, 1.0F, 1.0F);
+            }
+            // CraftBukkit end
         }
 
         if (entityliving != tileentityconduit.destroyTarget) {