diff --git a/apps/enp/serializers.py b/apps/enp/serializers.py
index 84a9ea9e..90633212 100644
--- a/apps/enp/serializers.py
+++ b/apps/enp/serializers.py
@@ -40,6 +40,8 @@ class EnvDataSerializer(CustomModelSerializer):
 
 
 class DrainEquipEnvSerializer(CustomModelSerializer):
+    equipment_number = serializers.CharField(
+        source='equipment.number', read_only=True)
     equipment_type = serializers.CharField(
         source='equipment.type', read_only=True)
     equipment_name = serializers.CharField(