diff --git a/prototypes/entity/entity-generators.lua b/prototypes/entity/entity-generators.lua
index ae32d2f..9f6df39 100644
--- a/prototypes/entity/entity-generators.lua
+++ b/prototypes/entity/entity-generators.lua
@@ -690,7 +690,8 @@ data:extend({
       {
         {type = "output", position = {0, -1.5}}
       },
-      production_type = "output"
+      production_type = "output",
+      filter = "steam"
     },
 	fluid_input =
     {
@@ -1142,7 +1143,8 @@ data:extend({
       {
         {type = "output", position = {0, -1.5}}
       },
-      production_type = "output"
+      production_type = "output",
+      filter = "steam"
     },
 	fluid_input =
     {
@@ -1595,7 +1597,8 @@ data:extend({
       {
         {type = "output", position = {0, -1.5}}
       },
-      production_type = "output"
+      production_type = "output",
+      filter = "steam"
     },
     fluid_input =
     {
@@ -1863,7 +1866,8 @@ data:extend({
       {
         {type = "output", position = {0, -1.5}}
       },
-      production_type = "output"
+      production_type = "output",
+      filter = "steam"
     },
     fluid_input =
     {