diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8f03191..1533b1c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog],
 and this project adheres to [Semantic Versioning].
 
+## [0.4.0] - 2023-11-10
+
+### Added
+- added `EnderIOEvents.conduits` event to allow adding custom energy conduits
+
 ## [0.3.1] - 2023-09-22
 
 ### Changed
diff --git a/src/main/java/com/almostreliable/kubeio/kube/event/ConduitRegistryEvent.java b/src/main/java/com/almostreliable/kubeio/kube/event/ConduitRegistryEvent.java
index d9edfcb..11d7dc7 100644
--- a/src/main/java/com/almostreliable/kubeio/kube/event/ConduitRegistryEvent.java
+++ b/src/main/java/com/almostreliable/kubeio/kube/event/ConduitRegistryEvent.java
@@ -5,6 +5,7 @@
 import com.enderio.EnderIO;
 import com.enderio.api.conduit.ConduitItemFactory;
 import com.enderio.api.conduit.ConduitTypes;
+import com.google.common.base.Preconditions;
 import dev.latvian.mods.kubejs.event.EventJS;
 import dev.latvian.mods.rhino.util.HideFromJS;
 import net.minecraft.world.item.Item;
@@ -19,6 +20,13 @@ public class ConduitRegistryEvent extends EventJS {
     public static final Set<CustomConduitEntry> CONDUITS = new HashSet<>();
 
     public void registerEnergyConduit(String id, String name, int transferRate) {
+        Preconditions.checkArgument(!id.contains(":"), "id must not contain a colon (:)");
+        Preconditions.checkArgument(!id.contains(" "), "id must not contain a space");
+        Preconditions.checkArgument(
+            CONDUITS.stream().anyMatch(conduit -> conduit.id().equals(id)),
+            "id must be unique"
+        );
+
         var type = ConduitTypes.CONDUIT_TYPES.register(id, () -> new CustomEnergyConduitType(
             EnderIO.loc("block/conduit/" + id),
             transferRate