---
product_id: 13218514
title: "Frost King DE300 Standard Plastic Drain Away Downspout Extender, Extends 12-Feet, Green"
brand: "thermwell"
price: "S$18"
currency: SGD
in_stock: true
category: "Thermwell"
url: https://www.desertcart.sg/products/13218514-frost-king-de300-standard-plastic-drain-away-downspout-extender-extends
store_origin: SG
region: Singapore
---

# Tool-free installation Custom trim to length Auto unrolls in rain Frost King DE300 Standard Plastic Drain Away Downspout Extender, Extends 12-Feet, Green

**Brand:** thermwell
**Price:** S$18
**Availability:** ✅ In Stock

## Summary

> 🌿 Keep your foundation dry and your curb appeal high—effortless drainage, no excuses!

## 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?** S$18 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/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

- • **Tailored Fit:** Easily trim to any length with scissors for a perfect, customized drainage solution.
- • **Sleek & Durable:** Matte green finish blends with your exterior while built tough to last season after season.
- • **Hassle-Free Setup:** No tools required—install in minutes and keep your home safe without the fuss.
- • **Foundation Guardian:** Directs water away from your home’s foundation, preventing costly damage and erosion.
- • **Rain-Responsive Design:** Automatically extends when it rains to protect your foundation effortlessly.

## Overview

The Frost King DE300 is a 12-foot long, green plastic downspout extender that automatically unrolls during rain to divert water away from your foundation. It installs easily without tools, can be trimmed to any length, and fits all standard downspouts, providing a simple yet effective solution to protect your home from water damage.

## 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". P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); Manufacturer Contact Information 1-800-526-5265 See more

## 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 | Automatic |
| Best Sellers Rank | #16,128 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #16 in Gutter Downspouts |
| Brand Name | Thermwell |
| Color | Green |
| Customer Reviews | 3.4 3.4 out of 5 stars (2,121) |
| 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 Dimensions W x H | 7.2"W x 1.45"H |
| Item Type Name | Frost King - DE300 |
| Item Weight | 13.61 g |
| Manufacturer | Frost King |
| Manufacturer Contact Information | 1-800-526-5265 |
| Manufacturer Part Number | DE300 |
| Manufacturer Warranty Description | Warranty. |
| Material Type | Plastic |
| Model Number | Frost King - DE300 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Product Style | Modern |
| UPC | 077578057576 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Thermwell
- **Color:** Green
- **Finish Type:** Matte
- **Material:** Plastic
- **Product Dimensions:** 7.2"W x 1.45"H

## 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)

## Available Options

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

## 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.

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**Shop now:** [https://www.desertcart.sg/products/13218514-frost-king-de300-standard-plastic-drain-away-downspout-extender-extends](https://www.desertcart.sg/products/13218514-frost-king-de300-standard-plastic-drain-away-downspout-extender-extends)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-09-30*