---
product_id: 432473506
title: "Supply Giant 6I5I Flexible Pvc Reducing Coupling with Stainless Steel Clamps, 6 x 4 Inch, Black, 6 x 4"
brand: "supply giant"
price: "$79.48"
currency: USD
in_stock: true
reviews_count: 5
category: "Supply Giant"
url: https://www.desertcart.us/products/432473506-supply-giant-6i5i-flexible-pvc-reducing-coupling-with-stainless-steel
store_origin: US
region: United States of America
---

# ASTM C1173 & UPC certified 6 x 4 inch flexible coupling Leak-proof & rot-proof seal Supply Giant 6I5I Flexible Pvc Reducing Coupling with Stainless Steel Clamps, 6 x 4 Inch, Black, 6 x 4

**Brand:** supply giant
**Price:** $79.48
**Availability:** ✅ In Stock

## Summary

> 🔗 Connect with confidence — the flexible coupling pros trust!

## Quick Answers

- **What is this?** Supply Giant 6I5I Flexible Pvc Reducing Coupling with Stainless Steel Clamps, 6 x 4 Inch, Black, 6 x 4 by supply giant
- **How much does it cost?** $79.48 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/432473506-supply-giant-6i5i-flexible-pvc-reducing-coupling-with-stainless-steel)

## Best For

- supply giant enthusiasts

## Why This Product

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

## Key Features

- • **Reliable Seal:** Leak-proof and rot-proof design ensures zero infiltration or exfiltration
- • **Certified Quality:** Meets ASTM C1173, CSA B602 standards & UPC approved for underground use
- • **Durable & Resilient:** Tough PVC resists chemicals, UV rays, fungus & sewer gases
- • **Versatile Application:** Ideal for drain, waste, vent, sewer, indoor & outdoor piping systems
- • **Universal Compatibility:** Seamlessly connects cast iron, copper, lead & steel pipes

## Overview

The Supply Giant 6x4 inch Flexible PVC Reducing Coupling with stainless steel clamps offers a durable, leak-proof connection compatible with multiple pipe materials. Certified to ASTM and UPC standards, it’s designed for both indoor and outdoor drain, waste, and vent systems, providing resilient performance against chemicals, UV, and sewer gases.

## Description

Supply Giant Flexible Couplings have found wide acceptance among sewer and plumbing contractors and municipalities because of their quality and ease of installation. Supply Giant pipe couplings and adapters are used for all types of in-house and sewer connections: drain, waste, vent piping, house-to-main, repairs, cut-ins, conductor, roof drains and increasers-reducers. Manufacturing thousands of different flexible coupling types, Supply Giant has the right solution for most applications. Made of tough elastomeric polyvinyl chloride (PVC), the flexible couplings are strong, resilient and unaffected by soil conditions. They are also resistant to chemicals, ultraviolet rays, fungus growth, and normal sewer gases due to the inert nature and physical properties of the PVC material. Supply Giant flexible couplings are leak-proof, rot-proof and seal against infiltration and exfiltration, giving you confidence in your pipe connections. ***CALIFORNIA PROPOSITION 65 WARNING: This product can expose you to chemicals including Phthalates content which are known to the State of California to cause cancer, and birth defects or other reproductive harm.

Review: Highly recomended!
Review: Perfect product but I had to replace it. I ordered the wrong size. It would help if dimensions (inside diameters) would be in the description.

## Features

- Flexible Coupling Compatible with cast iron, , copper, lead, and steel piping
- Flexible Connectors are Leak-Proof, Rot-Proof and Sealed Against Infiltration and Exfiltration,
- May be used for non-pressure drain, waste, and vent (DWV) piping systems and sewer systems indoors and outdoors
- Conforms to ASTM C1173, CSA B602, Certified and UPC Approved, Rated for underground use
- Each Rubber Fitting is marked with part number, size, and certifications

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07C7NFMRY |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #385,924 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #11,247 in Pipe Fittings |
| Brand | SUPPLYGIANT |
| Color | Black |
| Connector Type | Flange |
| Customer Reviews | 4.4 4.4 out of 5 stars (121) |
| Date First Available | April 16, 2018 |
| Exterior Finish | Brass |
| Global Trade Identification Number | 00804595048382 |
| Included Components | Coupling |
| Item Package Quantity | 1 |
| Item Weight | 14.4 ounces |
| Item dimensions L x W x H | 6 x 6 x 8 inches |
| Item model number | 6I5I |
| Manufacturer | Supply Giant |
| Material | Rubber |
| Measurement System | inch |
| Number of Pieces | 1 |
| Part Number | 6I5I |
| Product Dimensions | 6 x 6 x 8 inches |
| Shape | coupling |
| Size | 6 x 4 |
| Style | Single Unit |
| Thread Size | 4 inch |
| UPC | 804595048382 |
| Warranty Description | 15.262500000000001, 4838 |
| Water Consumption | 1 Gallons per Flush |

## Product Details

- **Brand:** SUPPLYGIANT
- **Color:** Black
- **Connector Type:** Flange
- **Exterior Finish:** Brass
- **Item Weight:** 0.9 Pounds
- **Item dimensions L x W x H:** 6 x 6 x 8 inches
- **Material:** Rubber
- **Number of Pieces:** 1
- **Size:** 6 x 4
- **Thread Size:** 4 inch

## Images

![Supply Giant 6I5I Flexible Pvc Reducing Coupling with Stainless Steel Clamps, 6 x 4 Inch, Black, 6 x 4 - Image 1](https://m.media-amazon.com/images/I/51UPU6mQNiL.jpg)

## Questions & Answers

**Q: Will this stretch  to connect a 6.5 pipe to a 4.5 pipe?**
A: looks like that is what is made for:
The small inside diameter is 4-7/16 inches  and the larger inside diameter is 6 -7/16 inches but it is flexible and should fit tightly in a pipe that is 6 -1/2"  outside diameter, smaller pipe outside diameter of 4 -1/2 inches.  You may need to coat inside of coupling with watered down dish wash soap to help slip it on.  Measure the outside diameter of the pipe you what to couple together...this looks like a fitting that adapts old 4 in terracotta sewer pipe to the newer 6 inch plastic pipe...I'm using for another project myself..  hope that helps

**Q: What is the outer diameter of both sides?**
A: 7 x 5

**Q: Will the 6” to 4” reducer work on a dust extraction system?**
A: if your system is similar to the system I know of and your tubes are true 4 inch x 6 inch it will work for yous

**Q: Will this work for connecting a 6 inch pvc to 4 inch pvc and i need to bend it about 45 degrees**
A: Not the right solution:   To do this right, you need a 6 inch to 4 inch PVC reducing adapter, a 4 inch 45 degree elbow, a few pieces of  6 inch & 4 inch PVC pipe, a can of PVC primer, a can of PVC solvent cement and maybe a saw to cut the pipe to size.  This is really easy to do.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by G***L on 10 August 2023*

Highly recomended!

### ⭐⭐⭐⭐⭐ Review
*by M***S on 16 January 2020*

Perfect product but I had to replace it. I ordered the wrong size. It would help if dimensions (inside diameters) would be in the description.

### ⭐⭐⭐⭐⭐ Review
*by A***R on 24 May 2021*

Just what I needed to finish my job.

## Frequently Bought Together

- Supply Giant 6I5I Flexible Pvc Reducing Coupling with Stainless Steel Clamps, 6.6" x 4.5" Inner Diameter for 6" x 4" Nominal Pipe, Black
- Fernco 1056-66 6-in. Flexible PVC Pipe Coupling for Cast Iron/Plastic/Steel Plumbing Connections in Black
- Fernco 1056-64 6" x 4" Flexible Pipe Coupling (Connects Cast Iron, PVC, Steel or Lead)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-22*