diff --git a/test/test.backpressure.ts b/test/test.backpressure.ts
index 03ca798..5028cef 100644
--- a/test/test.backpressure.ts
+++ b/test/test.backpressure.ts
@@ -19,15 +19,15 @@ tap.test('should run backpressure test', async (toolsArg) => {
       writeFunction: async (chunk, tools) => {
         await new Promise((resolve) => setTimeout(resolve, 20)); // Slow processing
         console.log(`processed chunk ${chunk} in stream 2`);
-        // await tools.push(chunk);
-        return chunk;
+        await tools.push(chunk);
+        // return chunk;
       },
     }); // This stream processes data more slowly
     const stream3 = new SmartDuplex({
       objectMode: true,
       name: 'stream3',
       writeFunction: async (chunk, tools) => {
-        await new Promise((resolve) => setTimeout(resolve, 100)); // Slow processing
+        await new Promise((resolve) => setTimeout(resolve, 200)); // Slow processing
         console.log(`processed chunk ${chunk} in stream 3`);
       },
     });
diff --git a/ts/00_commitinfo_data.ts b/ts/00_commitinfo_data.ts
index cf76c88..7f1c5c3 100644
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartstream',
-  version: '3.0.26',
+  version: '3.0.27',
   description: 'simplifies access to node streams'
 }
diff --git a/ts/index.ts b/ts/index.ts
index 3baab0e..7f8e9ce 100644
--- a/ts/index.ts
+++ b/ts/index.ts
@@ -1,4 +1,3 @@
-export * from './smartstream.classes.passthrough.js';
 export * from './smartstream.classes.smartduplex.js';
 export * from './smartstream.classes.streamwrapper.js';
 export * from './smartstream.classes.streamintake.js';
diff --git a/ts/smartstream.classes.passthrough.ts b/ts/smartstream.classes.passthrough.ts
deleted file mode 100644
index 202cc0a..0000000
--- a/ts/smartstream.classes.passthrough.ts
+++ /dev/null
@@ -1,21 +0,0 @@
-import * as plugins from './smartstream.plugins.js';
-
-export class PassThrough extends plugins.stream.Duplex {
-  constructor(options?: plugins.stream.DuplexOptions) {
-    super(options);
-  }
-
-  _read(size: number): void {
-    // No-op: Data written will be automatically available for reading.
-  }
-
-  _write(chunk: any, encoding: BufferEncoding, callback: (error?: Error | null) => void): void {
-    if (this.push(chunk, encoding)) {
-      callback();
-    } else {
-      this.once('drain', () => {
-        callback();
-      });
-    }
-  }
-}
\ No newline at end of file
diff --git a/ts/smartstream.functions.ts b/ts/smartstream.functions.ts
index 88afca7..647e780 100644
--- a/ts/smartstream.functions.ts
+++ b/ts/smartstream.functions.ts
@@ -18,4 +18,13 @@ export function createTransformFunction<TInput, TOutput>(
   });
 
   return smartDuplexStream;
+}
+
+export const createPassThrough = () => {
+  return new SmartDuplex({
+    objectMode: true,
+    writeFunction: async (chunkArg, toolsArg) => {
+      return chunkArg;
+    }
+  })
 }
\ No newline at end of file