---
product_id: 412545848
title: "Fernco Inc.P1056-43 4-Inch by 3-Inch Stock Coupling"
brand: "fernco"
price: "360.56 DT"
currency: TND
in_stock: true
category: "Fernco"
url: https://www.desertcart.tn/products/412545848-fernco-inc-p1056-43-4-inch-by-3-inch-stock
store_origin: TN
region: Tunisia
---

# 4-inch to 3-inch seamless pipe connection Compact 4.46 x 3.52 x 4.03 inch dimensions Durable no-metal, corrosion-resistant design Fernco Inc.P1056-43 4-Inch by 3-Inch Stock Coupling

**Brand:** fernco
**Price:** 360.56 DT
**Availability:** ✅ In Stock

## Summary

> 🔧 Seamless connections, zero compromises.

## Quick Answers

- **What is this?** Fernco Inc.P1056-43 4-Inch by 3-Inch Stock Coupling by fernco
- **How much does it cost?** 360.56 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/412545848-fernco-inc-p1056-43-4-inch-by-3-inch-stock)

## Best For

- fernco enthusiasts

## Why This Product

- Trusted fernco brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Made in the USA:** Proudly manufactured domestically, ensuring top-tier craftsmanship and quality control.
- • **Compact & Lightweight:** At just 404 grams, this coupling is easy to handle and install in tight spaces.
- • **Corrosion-Free Durability:** No metal parts mean ultimate resistance to rust and wear, extending your plumbing’s lifespan.
- • **Effortless Pipe Integration:** Connects 4-inch and 3-inch pipes with zero hassle, ensuring a perfect fit every time.
- • **Trusted Quality from Fernco:** Backed by a 4.8-star rating from 185+ professionals who demand reliability.

## Overview

The Fernco Inc. P1056-43 is a high-quality, no-metal flexible coupling designed to connect 4-inch and 3-inch pipes effortlessly. Made from durable plastic and stainless steel components, it offers corrosion resistance and compact dimensions (4.46 x 3.52 x 4.03 inches) for easy installation. With a strong 4.8-star rating and made in the USA, this coupling is a trusted choice for professional-grade plumbing solutions.

## Description

Fernco 1056-43 Coupling Flex 4X3 No Metal

## Features

- Brand: Fernco
- Part Number: 1056-43
- Coupling Flex 4X3 No Metal
- Stock coupling
- Use to connect any two pipes
- 4.46-Inch x 3.52-Inch x 4.03-Inch

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000BQWWLS |
| Brand Name | Fernco |
| Colour | Black |
| Connector Type | Coupling |
| Country of Publication | USA |
| Customer Reviews | 4.7 4.7 out of 5 stars (185) |
| Exterior Finish | Black |
| Global Trade Identification Number | 00018578000117 |
| Included Components | Fernco 1056-43 Coupling Flex 4X3 No Metal |
| Item Dimensions | 14 x 12.7 x 10.2 Centimeters |
| Item Type Name | Fernco 1056-43 Coupling Flex 4X3 No Metal |
| Item Weight | 404 g |
| Manufacturer | Fernco Inc. |
| Manufacturer Part Number | 1056-43 |
| Material Type | Plastic, Stainless Steel |
| Model Number | P1056-43 |
| Number of Pieces | 1 |
| Size | 4 x 3 Inch |
| Thread Size | 4 inch |
| Thread Type | NPT |
| UPC | 018578000117 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Fernco
- **Colour:** Black
- **Connector Type:** Coupling
- **Exterior Finish:** Black
- **Item Weight:** 404 g
- **Item dimensions L x W x H:** 14 x 12.7 x 10.2 Centimeters
- **Material:** Plastic, Stainless Steel
- **Size:** 4 x 3 Inch
- **Thread Size:** 4 inch
- **Thread Type:** NPT

## Images

![Fernco Inc.P1056-43 4-Inch by 3-Inch Stock Coupling - Image 1](https://m.media-amazon.com/images/I/61fRguyeu8L.jpg)
![Fernco Inc.P1056-43 4-Inch by 3-Inch Stock Coupling - Image 2](https://m.media-amazon.com/images/I/31x3QdDorFL.jpg)
![Fernco Inc.P1056-43 4-Inch by 3-Inch Stock Coupling - Image 3](https://m.media-amazon.com/images/I/31qM7vDDnTL.jpg)
![Fernco Inc.P1056-43 4-Inch by 3-Inch Stock Coupling - Image 4](https://m.media-amazon.com/images/I/31J4+vJuQnL.jpg)
![Fernco Inc.P1056-43 4-Inch by 3-Inch Stock Coupling - Image 5](https://m.media-amazon.com/images/I/41SS2rvyBXL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: I have 3.25" pvc installed for a radon system.  Will this sleeve work or do I need to get a 4" x 4"?**
A: 3.52-Inch is the smaller side of this Fernco.  So it will fit your pipe.  However the other side of this Fernco is 4 ", and would work if your fitting it to a 4 inch pipe or other fixture.  I bought these Fernco 4x3 to join my Radon pipe to my radon inline fan. The fan was 4" on the inlet and the exhaust side.  Two Fernco couplings to complete one job.

**Q: Can someone please tell me what the outside dimensions on both sides are? I'm needing it for a different kind of project than pipe fitting.**
A: My coupling is already installed on the radon fan device, but I tried to take the O.D. measurements of the coupling for you; the 3" side measures 4.05" OD. The 4" side was more difficult to measure exactly with my calipers, but I measured it as 5" OD. I hope this helps you, but if your use requires dead accurate measurements, I would contact the manufacturer directly.

**Q: How flexible is the material? I have a 3.5 x 5.00 and am woondering if it will be flexible enough to stretch over the 5" end.**
A: I went into my garage and looked at one waiting for a project.  The large end measured 4 and a quarter inches inside diameter.  I loosened the band clamp on that end a lot and tried to stretch it.  It did flex some for me.  I think you may possibly be able to stretch it to 5 but not more.  The wall thickness of the rubber is about 3/8 inch so it won't stretch easily.  Using some Vaseline or other lube might help it go on.  I have not tried it on a 5 inch O.D. pipe.

**Q: will this fit over 4 inch pvc pipe**
A: It should fit the 4" PVC pipe, as that is what it is made for. I used it to connect to a 4" O.D. radon fan outlet to a 3" O.D. PVC pipe and it fit both fine. As another user commented, you can use Vaseline or a silicon lubricant on it if the fit is a little tight. Mine went on very easily with no lubricant and had to be tightened with the clamp.

## Frequently Bought Together

- Fernco 1056-43 Coupling Flex 4X3 No Metal
- RadonAway 23029-1 RP140 Radon Mitigation Fan, 4",White
- XYF Air Easy Read Manometer | U-Tube Air Pressure Indicator (Blue)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-10-13*