diff --git a/src/controllers/installationController.js b/src/controllers/installationController.js
index e18ef9db..3b5bb3b7 100644
--- a/src/controllers/installationController.js
+++ b/src/controllers/installationController.js
@@ -760,23 +760,40 @@ exports.masterConnectedSlaveList = async (req, reply) => {
   try {
     const { connectedTo } = req.params;
 
-    // Find all tanks where connected_to matches the given parameter
-    const tanks = await Insensors.find({ connected_to: connectedTo,type: "slave"  });
+    // Step 1: Find all slave tanks where connected_to matches
+    const slaveTanks = await Insensors.find({ connected_to: connectedTo });
 
-    if (!tanks || tanks.length === 0) {
+    if (!slaveTanks || slaveTanks.length === 0) {
       return reply.status(404).send({ success: false, message: "No tanks found for the given connected_to value" });
     }
 
-    return reply.send({ success: true, data: tanks });
+    // Step 2: Fetch `tankLocation` and `typeOfWater` from the Tank schema
+    const tankDetails = await Tank.findOne({ hardwareId: connectedTo }, { tankLocation: 1, typeOfWater: 1 });
+
+    if (!tankDetails) {
+      return reply.status(404).send({ success: false, message: "Tank details not found for the given connectedTo" });
+    }
+
+    // Step 3: Count the number of connected slaves
+    const slaveCount = slaveTanks.length;
+
+    return reply.send({
+      success: true,
+      tankLocation: tankDetails.tankLocation,
+      typeOfWater: tankDetails.typeOfWater,
+      connectedSlaveCount: slaveCount,
+      data: slaveTanks,
+    });
 
   } catch (error) {
-    console.error("Error fetching tanks:", error);
+    console.error("Error fetching master connected slave data:", error);
     return reply.status(500).send({ success: false, message: "Internal Server Error" });
   }
 };
 
 
 
+
 exports.mastrerList = async (req, reply) => {
   try {
     const { customerId, installationId } = req.params;