---
product_id: 13218514
title: "Frost King DE300 Standard Plastic Drain Away Downspout Extender, Extends 12-Feet, Green"
brand: "thermwell"
price: "95.56 DT"
currency: TND
in_stock: true
reviews_count: 8
category: "Thermwell"
url: https://www.desertcart.tn/products/13218514-frost-king-de300-standard-plastic-drain-away-downspout-extender-extends
store_origin: TN
region: Tunisia
---

# Custom trim to fit Auto-unrolls when wet Tool-free install Frost King DE300 Standard Plastic Drain Away Downspout Extender, Extends 12-Feet, Green

**Brand:** thermwell
**Price:** 95.56 DT
**Availability:** ✅ In Stock

## Summary

> 🌿 Keep your foundation dry and your curb appeal high with effortless style!

## Quick Answers

- **What is this?** Frost King DE300 Standard Plastic Drain Away Downspout Extender, Extends 12-Feet, Green by thermwell
- **How much does it cost?** 95.56 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/13218514-frost-king-de300-standard-plastic-drain-away-downspout-extender-extends)

## Best For

- thermwell enthusiasts

## Why This Product

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

## Key Features

- • **Customizable Length:** Trim to any length with scissors for a perfect fit tailored to your home.
- • **Durable Matte Finish:** Sleek green plastic with a modern matte finish blends seamlessly with your exterior.
- • **Compact & Lightweight:** At just 0.48 ounces and 12 feet long, it’s easy to handle and store when not in use.
- • **Rain-Responsive Design:** Automatically extends when it rains to protect your foundation from water damage.
- • **Effortless Installation:** No tools required—get it set up in minutes and enjoy hassle-free maintenance.

## Overview

The Frost King DE300 is a 12-foot green plastic downspout extender that automatically unrolls during rain to divert water away from your foundation. It installs easily without tools, trims to any length, and features a durable matte finish for a modern look. Lightweight and removable, it’s designed for efficient water management and easy seasonal storage.

## Description

Product Description Extender fits all standard downspouts. Takes water away from foundation. Installs easily, without the use of any tools. Unrolls automatically when it rains, and roll back up manually when it's dry. Trim to any length with scissors. Measurements are 12' x 7". From the Manufacturer Extender fits all standard downspouts. Takes water away from foundation. Installs easily, without the use of any tools. Unrolls automatically when it rains, and roll back up manually when it's dry. Trim to any length with scissors. Measurements are 12' x 7". Manufacturer Contact Information 1-800-526-5265

Review: It functions as expected and very helpful. - Good in cost and functionality
Review: It is cheapo plastic and will never work as advertized - OK. First, it looks NOTHING like the picture. In the picture, it has an end cap that seals. In the picture, it does not have holes all the way down the plastic. In the picture, it looks like flexible, yet sturdy plastic. What I got was cheap plastic not much thicker than a gallon Ziploc bag. It will last about a week in the sun and weather. Because it had not anchor at the end, it would also just blow around and be worthless. There is no simple way to roll this up. It will just unroll itself. Do not recommend & I returned. Cheap, and badly designed. I would have paid $15 dollars for something I could have used.

## Features

- Unrolls automatically when it rains, and roll back up manually when it's dry
- Takes Water Away From Foundation
- Installs Easily, Without The Use Of Any Tools
- Measurements Are 12' X 7"

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B003K1GKCS |
| Additional Features | Removable |
| Best Sellers Rank | #16,072 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #14 in Gutter Downspouts |
| Brand | Thermwell |
| Brand Name | Thermwell |
| Color | Green |
| Customer Reviews | 3.5 out of 5 stars 2,082 Reviews |
| Finish Type | Matte |
| Finish Types | Matte |
| Fits Hole Size | 3 Inches |
| Global Trade Identification Number | 00077578057576 |
| Included Components | Frost King DE300 Standard Plastic Drain Away Downspout Extender, Extends 12-Feet, Green |
| Item Depth | 7 inches |
| Item Type Name | Frost King DE300 Standard Plastic Drain Away Downspout Extender, Extends 12-Feet, Green |
| Item Weight | 13.61 g |
| Manufacturer | THERMWELL PRODUCTS |
| Manufacturer Contact Information | 1-800-526-5265 |
| Manufacturer Part Number | DE300 |
| Manufacturer Warranty Description | Warranty. |
| Material | Plastic |
| Material Type | Plastic |
| Model Number | DE300 |
| Number of Items | 1 |
| Product Style | Modern |
| Special Feature | Removable |
| Style | Modern |
| UPC | 077578057576 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Thermwell
- **Color:** Green
- **Finish Type:** Matte
- **Material:** Plastic
- **Special Feature:** Removable

## Images

![Frost King DE300 Standard Plastic Drain Away Downspout Extender, Extends 12-Feet, Green - Image 1](https://m.media-amazon.com/images/I/71KS7X5-oHL.jpg)
![Frost King DE300 Standard Plastic Drain Away Downspout Extender, Extends 12-Feet, Green - Image 2](https://m.media-amazon.com/images/I/91gENHiU2EL.jpg)

## Questions & Answers

**Q: Can I get this in white**
A: I would have liked white too but didn't see any available.

**Q: Will this work at the end of a drain pipe past the btm of a downspout?**
A: Yes yet it doesn't retract , it just lays there. If its windy it will fly around so i zip tie mine to the downspout.

**Q: Can you cut it?**
A: Yes.  It is just thick plastic material.

**Q: Can you place to go around corners if you unroll yourself?**
A: Probably, if it is not a tight corner. I think a sharp bend would make the water back-up. It is just a thin plastic tube.

## Customer Reviews

### ⭐⭐⭐⭐⭐ It functions as expected and very helpful.
*by M***K on May 5, 2026*

Good in cost and functionality

### ⭐ It is cheapo plastic and will never work as advertized
*by N***X on August 20, 2025*

OK. First, it looks NOTHING like the picture. In the picture, it has an end cap that seals. In the picture, it does not have holes all the way down the plastic. In the picture, it looks like flexible, yet sturdy plastic. What I got was cheap plastic not much thicker than a gallon Ziploc bag. It will last about a week in the sun and weather. Because it had not anchor at the end, it would also just blow around and be worthless. There is no simple way to roll this up. It will just unroll itself. Do not recommend & I returned. Cheap, and badly designed. I would have paid $15 dollars for something I could have used.

### ⭐⭐⭐⭐ It actually worked for me
*by N***) on September 17, 2018*

SO I bought this in anticipation of heavy rains from Florence. Glad I did. It helped move untold gallons across my driveway and away from the house. It is a little odd in that it does not completely unroll at first and it is hard to see it working. However I can state that it truly does as evidenced by the lack of water in front of my garage door. One extra bonus is that it acts like a bit of a water diverter too. Water that was rolling down my driveway was redirected by this device in addition to moving the gutter water.

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-06-06*