---
product_id: 80050189
title: "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"
brand: "supplygiant"
price: "239 zł"
currency: PLN
in_stock: true
reviews_count: 8
category: "Supplygiant"
url: https://www.desertcart.pl/products/80050189-supply-giant-6i5i-flexible-pvc-reducing-coupling-with-stainless-steel
store_origin: PL
region: Poland
---

# ASTM & UPC certified for underground use 6.6" x 4.5" inner diameter precision fit Stainless steel clamps for corrosion resistance 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

**Brand:** supplygiant
**Price:** 239 zł
**Availability:** ✅ In Stock

## Summary

> 🔗 Connect with confidence — the flexible coupling that keeps your system leak-proof and future-ready!

## Quick Answers

- **What is this?** 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 by supplygiant
- **How much does it cost?** 239 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/80050189-supply-giant-6i5i-flexible-pvc-reducing-coupling-with-stainless-steel)

## Best For

- supplygiant enthusiasts

## Why This Product

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

## Key Features

- • **Easy Identification:** Clearly marked with size, part number & certifications for hassle-free selection
- • **Certified Durability:** Meets ASTM C1173 & CSA B602 standards, trusted by pros and municipalities alike
- • **Versatile Application:** Ideal for indoor/outdoor DWV and sewer systems, from repairs to new installs
- • **Leak-Proof & Rot-Proof:** Engineered to prevent infiltration and exfiltration, ensuring lasting reliability
- • **Universal Compatibility:** Seamlessly connects cast iron, copper, lead & steel pipes

## Overview

The Supply Giant 6I5I Flexible PVC Reducing Coupling features a 6.6" x 4.5" inner diameter designed for 6" x 4" nominal pipes, reinforced with stainless steel clamps for superior corrosion resistance. Compatible with multiple pipe materials including cast iron and copper, it’s certified to ASTM and UPC standards for underground use. This leak-proof, rot-proof coupling is perfect for drain, waste, vent, and sewer systems, delivering professional-grade durability and ease of installation trusted by contractors and municipalities.

## 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.

Review: SUPER QUALITY - Highly recomended!
Review: Dimensions - 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, 6.6" x 4.5" Inner Diameter for 6" x 4" Nominal Pipe, Black - Image 1](https://m.media-amazon.com/images/I/31Ej7Egi6VL.jpg)
![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 - Image 2](https://m.media-amazon.com/images/I/31ZyqrPOpEL.jpg)
![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 - Image 3](https://m.media-amazon.com/images/I/411MCwMk2aL.jpg)
![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 - Image 4](https://m.media-amazon.com/images/I/418X-cK9MYL.jpg)
![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 - Image 5](https://m.media-amazon.com/images/I/41BTvFSZUIL.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

### ⭐⭐⭐⭐⭐ SUPER QUALITY
*by G***L on August 10, 2023*

Highly recomended!

### ⭐⭐⭐⭐⭐ Dimensions
*by M***S on January 16, 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.

### ⭐⭐⭐⭐⭐ Flexible Pvc Reducing Coupling with Stainless Steel Clamps, 6 x 4 Inch
*by A***R on May 24, 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 Poland*
*Store origin: PL*
*Last updated: 2026-01-23*